diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tests/__init__.py
diff --git a/tests/test_cluster_health_parser.py b/tests/test_cluster_health_parser.py
new file mode 100644
index 0000000..b5c4ddd
--- /dev/null
+++ b/tests/test_cluster_health_parser.py
@@ -0,0 +1,147 @@
+import unittest
+
+from prometheus_es_exporter.cluster_health_parser import parse_response
+from tests.utils import convert_result
+
+
+# Sample responses generated by querying the endpoint on a Elasticsearch
+# server populated with the following data (http command = Httpie utility):
+# > http -v POST localhost:9200/foo/bar/1 val:=1 group1=a group2=a
+# > http -v POST localhost:9200/foo/bar/2 val:=2 group1=a group2=b
+# > http -v POST localhost:9200/foo/bar/3 val:=3 group1=b group2=b
+class Test(unittest.TestCase):
+    maxDiff = None
+
+    def test_endpoint(self):
+        # Endpoint: /_cluster/health?pretty&level=shards
+        response = {
+            'cluster_name': 'elasticsearch',
+            'status': 'yellow',
+            'timed_out': False,
+            'number_of_nodes': 1,
+            'number_of_data_nodes': 1,
+            'active_primary_shards': 5,
+            'active_shards': 5,
+            'relocating_shards': 0,
+            'initializing_shards': 0,
+            'unassigned_shards': 5,
+            'delayed_unassigned_shards': 0,
+            'number_of_pending_tasks': 0,
+            'number_of_in_flight_fetch': 0,
+            'task_max_waiting_in_queue_millis': 0,
+            'active_shards_percent_as_number': 50.0,
+            'indices': {
+                'foo': {
+                    'status': 'yellow',
+                    'number_of_shards': 5,
+                    'number_of_replicas': 1,
+                    'active_primary_shards': 5,
+                    'active_shards': 5,
+                    'relocating_shards': 0,
+                    'initializing_shards': 0,
+                    'unassigned_shards': 5,
+                    'shards': {
+                        '0': {
+                            'status': 'yellow',
+                            'primary_active': True,
+                            'active_shards': 1,
+                            'relocating_shards': 0,
+                            'initializing_shards': 0,
+                            'unassigned_shards': 1
+                        },
+                        '1': {
+                            'status': 'yellow',
+                            'primary_active': True,
+                            'active_shards': 1,
+                            'relocating_shards': 0,
+                            'initializing_shards': 0,
+                            'unassigned_shards': 1
+                        },
+                        '2': {
+                            'status': 'yellow',
+                            'primary_active': True,
+                            'active_shards': 1,
+                            'relocating_shards': 0,
+                            'initializing_shards': 0,
+                            'unassigned_shards': 1
+                        },
+                        '3': {
+                            'status': 'yellow',
+                            'primary_active': True,
+                            'active_shards': 1,
+                            'relocating_shards': 0,
+                            'initializing_shards': 0,
+                            'unassigned_shards': 1
+                        },
+                        '4': {
+                            'status': 'yellow',
+                            'primary_active': True,
+                            'active_shards': 1,
+                            'relocating_shards': 0,
+                            'initializing_shards': 0,
+                            'unassigned_shards': 1
+                        }
+                    }
+                }
+            }
+        }
+
+        expected = {
+            'status': 1,
+            'number_of_nodes': 1,
+            'number_of_data_nodes': 1,
+            'active_primary_shards': 5,
+            'active_shards': 5,
+            'relocating_shards': 0,
+            'initializing_shards': 0,
+            'unassigned_shards': 5,
+            'delayed_unassigned_shards': 0,
+            'number_of_pending_tasks': 0,
+            'number_of_in_flight_fetch': 0,
+            'task_max_waiting_in_queue_millis': 0,
+            'active_shards_percent_as_number': 50.0,
+            'indices_status{index="foo"}': 1,
+            'indices_number_of_shards{index="foo"}': 5,
+            'indices_number_of_replicas{index="foo"}': 1,
+            'indices_active_primary_shards{index="foo"}': 5,
+            'indices_active_shards{index="foo"}': 5,
+            'indices_relocating_shards{index="foo"}': 0,
+            'indices_initializing_shards{index="foo"}': 0,
+            'indices_unassigned_shards{index="foo"}': 5,
+            'indices_shards_status{index="foo",shard="0"}': 1,
+            'indices_shards_primary_active{index="foo",shard="0"}': 1,
+            'indices_shards_active_shards{index="foo",shard="0"}': 1,
+            'indices_shards_relocating_shards{index="foo",shard="0"}': 0,
+            'indices_shards_initializing_shards{index="foo",shard="0"}': 0,
+            'indices_shards_unassigned_shards{index="foo",shard="0"}': 1,
+            'indices_shards_status{index="foo",shard="1"}': 1,
+            'indices_shards_primary_active{index="foo",shard="1"}': 1,
+            'indices_shards_active_shards{index="foo",shard="1"}': 1,
+            'indices_shards_relocating_shards{index="foo",shard="1"}': 0,
+            'indices_shards_initializing_shards{index="foo",shard="1"}': 0,
+            'indices_shards_unassigned_shards{index="foo",shard="1"}': 1,
+            'indices_shards_status{index="foo",shard="2"}': 1,
+            'indices_shards_primary_active{index="foo",shard="2"}': 1,
+            'indices_shards_active_shards{index="foo",shard="2"}': 1,
+            'indices_shards_relocating_shards{index="foo",shard="2"}': 0,
+            'indices_shards_initializing_shards{index="foo",shard="2"}': 0,
+            'indices_shards_unassigned_shards{index="foo",shard="2"}': 1,
+            'indices_shards_status{index="foo",shard="3"}': 1,
+            'indices_shards_primary_active{index="foo",shard="3"}': 1,
+            'indices_shards_active_shards{index="foo",shard="3"}': 1,
+            'indices_shards_relocating_shards{index="foo",shard="3"}': 0,
+            'indices_shards_initializing_shards{index="foo",shard="3"}': 0,
+            'indices_shards_unassigned_shards{index="foo",shard="3"}': 1,
+            'indices_shards_status{index="foo",shard="4"}': 1,
+            'indices_shards_primary_active{index="foo",shard="4"}': 1,
+            'indices_shards_active_shards{index="foo",shard="4"}': 1,
+            'indices_shards_relocating_shards{index="foo",shard="4"}': 0,
+            'indices_shards_initializing_shards{index="foo",shard="4"}': 0,
+            'indices_shards_unassigned_shards{index="foo",shard="4"}': 1,
+        }
+        result = convert_result(parse_response(response))
+        self.assertEqual(expected, result)
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/tests/test_indices_stats_parser.py b/tests/test_indices_stats_parser.py
new file mode 100644
index 0000000..ae41c62
--- /dev/null
+++ b/tests/test_indices_stats_parser.py
@@ -0,0 +1,883 @@
+import unittest
+
+from prometheus_es_exporter.indices_stats_parser import parse_response
+from tests.utils import convert_result
+
+
+# Sample responses generated by querying the endpoint on a Elasticsearch
+# server populated with the following data (http command = Httpie utility):
+# > http -v POST localhost:9200/foo/bar/1 val:=1 group1=a group2=a
+# > http -v POST localhost:9200/foo/bar/2 val:=2 group1=a group2=b
+# > http -v POST localhost:9200/foo/bar/3 val:=3 group1=b group2=b
+# Some details are instance specific, so mileage may vary!
+class Test(unittest.TestCase):
+    maxDiff = None
+
+    # Endpoint: /_stats?pretty
+    response = {
+        '_shards': {
+            'total': 10,
+            'successful': 5,
+            'failed': 0
+        },
+        '_all': {
+            'primaries': {
+                'docs': {
+                    'count': 3,
+                    'deleted': 0
+                },
+                'store': {
+                    'size_in_bytes': 12690,
+                    'throttle_time_in_millis': 0
+                },
+                'indexing': {
+                    'index_total': 3,
+                    'index_time_in_millis': 45,
+                    'index_current': 0,
+                    'index_failed': 0,
+                    'delete_total': 0,
+                    'delete_time_in_millis': 0,
+                    'delete_current': 0,
+                    'noop_update_total': 0,
+                    'is_throttled': False,
+                    'throttle_time_in_millis': 0
+                },
+                'get': {
+                    'total': 0,
+                    'time_in_millis': 0,
+                    'exists_total': 0,
+                    'exists_time_in_millis': 0,
+                    'missing_total': 0,
+                    'missing_time_in_millis': 0,
+                    'current': 0
+                },
+                'search': {
+                    'open_contexts': 0,
+                    'query_total': 0,
+                    'query_time_in_millis': 0,
+                    'query_current': 0,
+                    'fetch_total': 0,
+                    'fetch_time_in_millis': 0,
+                    'fetch_current': 0,
+                    'scroll_total': 0,
+                    'scroll_time_in_millis': 0,
+                    'scroll_current': 0,
+                    'suggest_total': 0,
+                    'suggest_time_in_millis': 0,
+                    'suggest_current': 0
+                },
+                'merges': {
+                    'current': 0,
+                    'current_docs': 0,
+                    'current_size_in_bytes': 0,
+                    'total': 0,
+                    'total_time_in_millis': 0,
+                    'total_docs': 0,
+                    'total_size_in_bytes': 0,
+                    'total_stopped_time_in_millis': 0,
+                    'total_throttled_time_in_millis': 0,
+                    'total_auto_throttle_in_bytes': 104857600
+                },
+                'refresh': {
+                    'total': 3,
+                    'total_time_in_millis': 107
+                },
+                'flush': {
+                    'total': 0,
+                    'total_time_in_millis': 0
+                },
+                'warmer': {
+                    'current': 0,
+                    'total': 8,
+                    'total_time_in_millis': 6
+                },
+                'query_cache': {
+                    'memory_size_in_bytes': 0,
+                    'total_count': 0,
+                    'hit_count': 0,
+                    'miss_count': 0,
+                    'cache_size': 0,
+                    'cache_count': 0,
+                    'evictions': 0
+                },
+                'fielddata': {
+                    'memory_size_in_bytes': 0,
+                    'evictions': 0,
+                    'fields': {
+                        'group1': {
+                            'memory_size_in_bytes': 1024
+                        },
+                        'group2': {
+                            'memory_size_in_bytes': 2048
+                        }
+                    }
+                },
+                'completion': {
+                    'size_in_bytes': 0
+                },
+                'segments': {
+                    'count': 3,
+                    'memory_in_bytes': 7908,
+                    'terms_memory_in_bytes': 5976,
+                    'stored_fields_memory_in_bytes': 936,
+                    'term_vectors_memory_in_bytes': 0,
+                    'norms_memory_in_bytes': 576,
+                    'points_memory_in_bytes': 144,
+                    'doc_values_memory_in_bytes': 276,
+                    'index_writer_memory_in_bytes': 0,
+                    'version_map_memory_in_bytes': 0,
+                    'fixed_bit_set_memory_in_bytes': 0,
+                    'max_unsafe_auto_id_timestamp': -1,
+                    'file_sizes': {}
+                },
+                'translog': {
+                    'operations': 3,
+                    'size_in_bytes': 491
+                },
+                'request_cache': {
+                    'memory_size_in_bytes': 0,
+                    'evictions': 0,
+                    'hit_count': 0,
+                    'miss_count': 0
+                },
+                'recovery': {
+                    'current_as_source': 0,
+                    'current_as_target': 0,
+                    'throttle_time_in_millis': 0
+                }
+            },
+            'total': {
+                'docs': {
+                    'count': 3,
+                    'deleted': 0
+                },
+                'store': {
+                    'size_in_bytes': 12690,
+                    'throttle_time_in_millis': 0
+                },
+                'indexing': {
+                    'index_total': 3,
+                    'index_time_in_millis': 45,
+                    'index_current': 0,
+                    'index_failed': 0,
+                    'delete_total': 0,
+                    'delete_time_in_millis': 0,
+                    'delete_current': 0,
+                    'noop_update_total': 0,
+                    'is_throttled': False,
+                    'throttle_time_in_millis': 0
+                },
+                'get': {
+                    'total': 0,
+                    'time_in_millis': 0,
+                    'exists_total': 0,
+                    'exists_time_in_millis': 0,
+                    'missing_total': 0,
+                    'missing_time_in_millis': 0,
+                    'current': 0
+                },
+                'search': {
+                    'open_contexts': 0,
+                    'query_total': 0,
+                    'query_time_in_millis': 0,
+                    'query_current': 0,
+                    'fetch_total': 0,
+                    'fetch_time_in_millis': 0,
+                    'fetch_current': 0,
+                    'scroll_total': 0,
+                    'scroll_time_in_millis': 0,
+                    'scroll_current': 0,
+                    'suggest_total': 0,
+                    'suggest_time_in_millis': 0,
+                    'suggest_current': 0
+                },
+                'merges': {
+                    'current': 0,
+                    'current_docs': 0,
+                    'current_size_in_bytes': 0,
+                    'total': 0,
+                    'total_time_in_millis': 0,
+                    'total_docs': 0,
+                    'total_size_in_bytes': 0,
+                    'total_stopped_time_in_millis': 0,
+                    'total_throttled_time_in_millis': 0,
+                    'total_auto_throttle_in_bytes': 104857600
+                },
+                'refresh': {
+                    'total': 3,
+                    'total_time_in_millis': 107
+                },
+                'flush': {
+                    'total': 0,
+                    'total_time_in_millis': 0
+                },
+                'warmer': {
+                    'current': 0,
+                    'total': 8,
+                    'total_time_in_millis': 6
+                },
+                'query_cache': {
+                    'memory_size_in_bytes': 0,
+                    'total_count': 0,
+                    'hit_count': 0,
+                    'miss_count': 0,
+                    'cache_size': 0,
+                    'cache_count': 0,
+                    'evictions': 0
+                },
+                'fielddata': {
+                    'memory_size_in_bytes': 0,
+                    'evictions': 0,
+                    'fields': {
+                        'group1': {
+                            'memory_size_in_bytes': 1024
+                        },
+                        'group2': {
+                            'memory_size_in_bytes': 2048
+                        }
+                    }
+                },
+                'completion': {
+                    'size_in_bytes': 0
+                },
+                'segments': {
+                    'count': 3,
+                    'memory_in_bytes': 7908,
+                    'terms_memory_in_bytes': 5976,
+                    'stored_fields_memory_in_bytes': 936,
+                    'term_vectors_memory_in_bytes': 0,
+                    'norms_memory_in_bytes': 576,
+                    'points_memory_in_bytes': 144,
+                    'doc_values_memory_in_bytes': 276,
+                    'index_writer_memory_in_bytes': 0,
+                    'version_map_memory_in_bytes': 0,
+                    'fixed_bit_set_memory_in_bytes': 0,
+                    'max_unsafe_auto_id_timestamp': -1,
+                    'file_sizes': {}
+                },
+                'translog': {
+                    'operations': 3,
+                    'size_in_bytes': 491
+                },
+                'request_cache': {
+                    'memory_size_in_bytes': 0,
+                    'evictions': 0,
+                    'hit_count': 0,
+                    'miss_count': 0
+                },
+                'recovery': {
+                    'current_as_source': 0,
+                    'current_as_target': 0,
+                    'throttle_time_in_millis': 0
+                }
+            }
+        },
+        'indices': {
+            'foo': {
+                'primaries': {
+                    'docs': {
+                        'count': 3,
+                        'deleted': 0
+                    },
+                    'store': {
+                        'size_in_bytes': 12690,
+                        'throttle_time_in_millis': 0
+                    },
+                    'indexing': {
+                        'index_total': 3,
+                        'index_time_in_millis': 45,
+                        'index_current': 0,
+                        'index_failed': 0,
+                        'delete_total': 0,
+                        'delete_time_in_millis': 0,
+                        'delete_current': 0,
+                        'noop_update_total': 0,
+                        'is_throttled': False,
+                        'throttle_time_in_millis': 0
+                    },
+                    'get': {
+                        'total': 0,
+                        'time_in_millis': 0,
+                        'exists_total': 0,
+                        'exists_time_in_millis': 0,
+                        'missing_total': 0,
+                        'missing_time_in_millis': 0,
+                        'current': 0
+                    },
+                    'search': {
+                        'open_contexts': 0,
+                        'query_total': 0,
+                        'query_time_in_millis': 0,
+                        'query_current': 0,
+                        'fetch_total': 0,
+                        'fetch_time_in_millis': 0,
+                        'fetch_current': 0,
+                        'scroll_total': 0,
+                        'scroll_time_in_millis': 0,
+                        'scroll_current': 0,
+                        'suggest_total': 0,
+                        'suggest_time_in_millis': 0,
+                        'suggest_current': 0
+                    },
+                    'merges': {
+                        'current': 0,
+                        'current_docs': 0,
+                        'current_size_in_bytes': 0,
+                        'total': 0,
+                        'total_time_in_millis': 0,
+                        'total_docs': 0,
+                        'total_size_in_bytes': 0,
+                        'total_stopped_time_in_millis': 0,
+                        'total_throttled_time_in_millis': 0,
+                        'total_auto_throttle_in_bytes': 104857600
+                    },
+                    'refresh': {
+                        'total': 3,
+                        'total_time_in_millis': 107
+                    },
+                    'flush': {
+                        'total': 0,
+                        'total_time_in_millis': 0
+                    },
+                    'warmer': {
+                        'current': 0,
+                        'total': 8,
+                        'total_time_in_millis': 6
+                    },
+                    'query_cache': {
+                        'memory_size_in_bytes': 0,
+                        'total_count': 0,
+                        'hit_count': 0,
+                        'miss_count': 0,
+                        'cache_size': 0,
+                        'cache_count': 0,
+                        'evictions': 0
+                    },
+                    'fielddata': {
+                        'memory_size_in_bytes': 0,
+                        'evictions': 0,
+                        'fields': {
+                            'group1': {
+                                'memory_size_in_bytes': 1024
+                            },
+                            'group2': {
+                                'memory_size_in_bytes': 2048
+                            }
+                        }
+                    },
+                    'completion': {
+                        'size_in_bytes': 0
+                    },
+                    'segments': {
+                        'count': 3,
+                        'memory_in_bytes': 7908,
+                        'terms_memory_in_bytes': 5976,
+                        'stored_fields_memory_in_bytes': 936,
+                        'term_vectors_memory_in_bytes': 0,
+                        'norms_memory_in_bytes': 576,
+                        'points_memory_in_bytes': 144,
+                        'doc_values_memory_in_bytes': 276,
+                        'index_writer_memory_in_bytes': 0,
+                        'version_map_memory_in_bytes': 0,
+                        'fixed_bit_set_memory_in_bytes': 0,
+                        'max_unsafe_auto_id_timestamp': -1,
+                        'file_sizes': {}
+                    },
+                    'translog': {
+                        'operations': 3,
+                        'size_in_bytes': 491
+                    },
+                    'request_cache': {
+                        'memory_size_in_bytes': 0,
+                        'evictions': 0,
+                        'hit_count': 0,
+                        'miss_count': 0
+                    },
+                    'recovery': {
+                        'current_as_source': 0,
+                        'current_as_target': 0,
+                        'throttle_time_in_millis': 0
+                    }
+                },
+                'total': {
+                    'docs': {
+                        'count': 3,
+                        'deleted': 0
+                    },
+                    'store': {
+                        'size_in_bytes': 12690,
+                        'throttle_time_in_millis': 0
+                    },
+                    'indexing': {
+                        'index_total': 3,
+                        'index_time_in_millis': 45,
+                        'index_current': 0,
+                        'index_failed': 0,
+                        'delete_total': 0,
+                        'delete_time_in_millis': 0,
+                        'delete_current': 0,
+                        'noop_update_total': 0,
+                        'is_throttled': False,
+                        'throttle_time_in_millis': 0
+                    },
+                    'get': {
+                        'total': 0,
+                        'time_in_millis': 0,
+                        'exists_total': 0,
+                        'exists_time_in_millis': 0,
+                        'missing_total': 0,
+                        'missing_time_in_millis': 0,
+                        'current': 0
+                    },
+                    'search': {
+                        'open_contexts': 0,
+                        'query_total': 0,
+                        'query_time_in_millis': 0,
+                        'query_current': 0,
+                        'fetch_total': 0,
+                        'fetch_time_in_millis': 0,
+                        'fetch_current': 0,
+                        'scroll_total': 0,
+                        'scroll_time_in_millis': 0,
+                        'scroll_current': 0,
+                        'suggest_total': 0,
+                        'suggest_time_in_millis': 0,
+                        'suggest_current': 0
+                    },
+                    'merges': {
+                        'current': 0,
+                        'current_docs': 0,
+                        'current_size_in_bytes': 0,
+                        'total': 0,
+                        'total_time_in_millis': 0,
+                        'total_docs': 0,
+                        'total_size_in_bytes': 0,
+                        'total_stopped_time_in_millis': 0,
+                        'total_throttled_time_in_millis': 0,
+                        'total_auto_throttle_in_bytes': 104857600
+                    },
+                    'refresh': {
+                        'total': 3,
+                        'total_time_in_millis': 107
+                    },
+                    'flush': {
+                        'total': 0,
+                        'total_time_in_millis': 0
+                    },
+                    'warmer': {
+                        'current': 0,
+                        'total': 8,
+                        'total_time_in_millis': 6
+                    },
+                    'query_cache': {
+                        'memory_size_in_bytes': 0,
+                        'total_count': 0,
+                        'hit_count': 0,
+                        'miss_count': 0,
+                        'cache_size': 0,
+                        'cache_count': 0,
+                        'evictions': 0
+                    },
+                    'fielddata': {
+                        'memory_size_in_bytes': 0,
+                        'evictions': 0,
+                        'fields': {
+                            'group1': {
+                                'memory_size_in_bytes': 1024
+                            },
+                            'group2': {
+                                'memory_size_in_bytes': 2048
+                            }
+                        }
+                    },
+                    'completion': {
+                        'size_in_bytes': 0
+                    },
+                    'segments': {
+                        'count': 3,
+                        'memory_in_bytes': 7908,
+                        'terms_memory_in_bytes': 5976,
+                        'stored_fields_memory_in_bytes': 936,
+                        'term_vectors_memory_in_bytes': 0,
+                        'norms_memory_in_bytes': 576,
+                        'points_memory_in_bytes': 144,
+                        'doc_values_memory_in_bytes': 276,
+                        'index_writer_memory_in_bytes': 0,
+                        'version_map_memory_in_bytes': 0,
+                        'fixed_bit_set_memory_in_bytes': 0,
+                        'max_unsafe_auto_id_timestamp': -1,
+                        'file_sizes': {}
+                    },
+                    'translog': {
+                        'operations': 3,
+                        'size_in_bytes': 491
+                    },
+                    'request_cache': {
+                        'memory_size_in_bytes': 0,
+                        'evictions': 0,
+                        'hit_count': 0,
+                        'miss_count': 0
+                    },
+                    'recovery': {
+                        'current_as_source': 0,
+                        'current_as_target': 0,
+                        'throttle_time_in_millis': 0
+                    }
+                }
+            }
+        }
+    }
+
+    def test_endpoint_cluster(self):
+
+        expected = {
+            'primaries_docs_count{index="_all"}': 3,
+            'primaries_docs_deleted{index="_all"}': 0,
+            'primaries_store_size_in_bytes{index="_all"}': 12690,
+            'primaries_store_throttle_time_in_millis{index="_all"}': 0,
+            'primaries_indexing_index_total{index="_all"}': 3,
+            'primaries_indexing_index_time_in_millis{index="_all"}': 45,
+            'primaries_indexing_index_current{index="_all"}': 0,
+            'primaries_indexing_index_failed{index="_all"}': 0,
+            'primaries_indexing_delete_total{index="_all"}': 0,
+            'primaries_indexing_delete_time_in_millis{index="_all"}': 0,
+            'primaries_indexing_delete_current{index="_all"}': 0,
+            'primaries_indexing_noop_update_total{index="_all"}': 0,
+            'primaries_indexing_is_throttled{index="_all"}': 0,
+            'primaries_indexing_throttle_time_in_millis{index="_all"}': 0,
+            'primaries_get_total{index="_all"}': 0,
+            'primaries_get_time_in_millis{index="_all"}': 0,
+            'primaries_get_exists_total{index="_all"}': 0,
+            'primaries_get_exists_time_in_millis{index="_all"}': 0,
+            'primaries_get_missing_total{index="_all"}': 0,
+            'primaries_get_missing_time_in_millis{index="_all"}': 0,
+            'primaries_get_current{index="_all"}': 0,
+            'primaries_search_open_contexts{index="_all"}': 0,
+            'primaries_search_query_total{index="_all"}': 0,
+            'primaries_search_query_time_in_millis{index="_all"}': 0,
+            'primaries_search_query_current{index="_all"}': 0,
+            'primaries_search_fetch_total{index="_all"}': 0,
+            'primaries_search_fetch_time_in_millis{index="_all"}': 0,
+            'primaries_search_fetch_current{index="_all"}': 0,
+            'primaries_search_scroll_total{index="_all"}': 0,
+            'primaries_search_scroll_time_in_millis{index="_all"}': 0,
+            'primaries_search_scroll_current{index="_all"}': 0,
+            'primaries_search_suggest_total{index="_all"}': 0,
+            'primaries_search_suggest_time_in_millis{index="_all"}': 0,
+            'primaries_search_suggest_current{index="_all"}': 0,
+            'primaries_merges_current{index="_all"}': 0,
+            'primaries_merges_current_docs{index="_all"}': 0,
+            'primaries_merges_current_size_in_bytes{index="_all"}': 0,
+            'primaries_merges_total{index="_all"}': 0,
+            'primaries_merges_total_time_in_millis{index="_all"}': 0,
+            'primaries_merges_total_docs{index="_all"}': 0,
+            'primaries_merges_total_size_in_bytes{index="_all"}': 0,
+            'primaries_merges_total_stopped_time_in_millis{index="_all"}': 0,
+            'primaries_merges_total_throttled_time_in_millis{index="_all"}': 0,
+            'primaries_merges_total_auto_throttle_in_bytes{index="_all"}': 104857600,
+            'primaries_refresh_total{index="_all"}': 3,
+            'primaries_refresh_total_time_in_millis{index="_all"}': 107,
+            'primaries_flush_total{index="_all"}': 0,
+            'primaries_flush_total_time_in_millis{index="_all"}': 0,
+            'primaries_warmer_current{index="_all"}': 0,
+            'primaries_warmer_total{index="_all"}': 8,
+            'primaries_warmer_total_time_in_millis{index="_all"}': 6,
+            'primaries_query_cache_memory_size_in_bytes{index="_all"}': 0,
+            'primaries_query_cache_total_count{index="_all"}': 0,
+            'primaries_query_cache_hit_count{index="_all"}': 0,
+            'primaries_query_cache_miss_count{index="_all"}': 0,
+            'primaries_query_cache_cache_size{index="_all"}': 0,
+            'primaries_query_cache_cache_count{index="_all"}': 0,
+            'primaries_query_cache_evictions{index="_all"}': 0,
+            'primaries_fielddata_memory_size_in_bytes{index="_all"}': 0,
+            'primaries_fielddata_evictions{index="_all"}': 0,
+            'primaries_fielddata_fields_memory_size_in_bytes{index="_all",field="group1"}': 1024,
+            'primaries_fielddata_fields_memory_size_in_bytes{index="_all",field="group2"}': 2048,
+            'primaries_completion_size_in_bytes{index="_all"}': 0,
+            'primaries_segments_count{index="_all"}': 3,
+            'primaries_segments_memory_in_bytes{index="_all"}': 7908,
+            'primaries_segments_terms_memory_in_bytes{index="_all"}': 5976,
+            'primaries_segments_stored_fields_memory_in_bytes{index="_all"}': 936,
+            'primaries_segments_term_vectors_memory_in_bytes{index="_all"}': 0,
+            'primaries_segments_norms_memory_in_bytes{index="_all"}': 576,
+            'primaries_segments_points_memory_in_bytes{index="_all"}': 144,
+            'primaries_segments_doc_values_memory_in_bytes{index="_all"}': 276,
+            'primaries_segments_index_writer_memory_in_bytes{index="_all"}': 0,
+            'primaries_segments_version_map_memory_in_bytes{index="_all"}': 0,
+            'primaries_segments_fixed_bit_set_memory_in_bytes{index="_all"}': 0,
+            'primaries_segments_max_unsafe_auto_id_timestamp{index="_all"}': -1,
+            'primaries_translog_operations{index="_all"}': 3,
+            'primaries_translog_size_in_bytes{index="_all"}': 491,
+            'primaries_request_cache_memory_size_in_bytes{index="_all"}': 0,
+            'primaries_request_cache_evictions{index="_all"}': 0,
+            'primaries_request_cache_hit_count{index="_all"}': 0,
+            'primaries_request_cache_miss_count{index="_all"}': 0,
+            'primaries_recovery_current_as_source{index="_all"}': 0,
+            'primaries_recovery_current_as_target{index="_all"}': 0,
+            'primaries_recovery_throttle_time_in_millis{index="_all"}': 0,
+            'total_docs_count{index="_all"}': 3,
+            'total_docs_deleted{index="_all"}': 0,
+            'total_store_size_in_bytes{index="_all"}': 12690,
+            'total_store_throttle_time_in_millis{index="_all"}': 0,
+            'total_indexing_index_total{index="_all"}': 3,
+            'total_indexing_index_time_in_millis{index="_all"}': 45,
+            'total_indexing_index_current{index="_all"}': 0,
+            'total_indexing_index_failed{index="_all"}': 0,
+            'total_indexing_delete_total{index="_all"}': 0,
+            'total_indexing_delete_time_in_millis{index="_all"}': 0,
+            'total_indexing_delete_current{index="_all"}': 0,
+            'total_indexing_noop_update_total{index="_all"}': 0,
+            'total_indexing_is_throttled{index="_all"}': 0,
+            'total_indexing_throttle_time_in_millis{index="_all"}': 0,
+            'total_get_total{index="_all"}': 0,
+            'total_get_time_in_millis{index="_all"}': 0,
+            'total_get_exists_total{index="_all"}': 0,
+            'total_get_exists_time_in_millis{index="_all"}': 0,
+            'total_get_missing_total{index="_all"}': 0,
+            'total_get_missing_time_in_millis{index="_all"}': 0,
+            'total_get_current{index="_all"}': 0,
+            'total_search_open_contexts{index="_all"}': 0,
+            'total_search_query_total{index="_all"}': 0,
+            'total_search_query_time_in_millis{index="_all"}': 0,
+            'total_search_query_current{index="_all"}': 0,
+            'total_search_fetch_total{index="_all"}': 0,
+            'total_search_fetch_time_in_millis{index="_all"}': 0,
+            'total_search_fetch_current{index="_all"}': 0,
+            'total_search_scroll_total{index="_all"}': 0,
+            'total_search_scroll_time_in_millis{index="_all"}': 0,
+            'total_search_scroll_current{index="_all"}': 0,
+            'total_search_suggest_total{index="_all"}': 0,
+            'total_search_suggest_time_in_millis{index="_all"}': 0,
+            'total_search_suggest_current{index="_all"}': 0,
+            'total_merges_current{index="_all"}': 0,
+            'total_merges_current_docs{index="_all"}': 0,
+            'total_merges_current_size_in_bytes{index="_all"}': 0,
+            'total_merges_total{index="_all"}': 0,
+            'total_merges_total_time_in_millis{index="_all"}': 0,
+            'total_merges_total_docs{index="_all"}': 0,
+            'total_merges_total_size_in_bytes{index="_all"}': 0,
+            'total_merges_total_stopped_time_in_millis{index="_all"}': 0,
+            'total_merges_total_throttled_time_in_millis{index="_all"}': 0,
+            'total_merges_total_auto_throttle_in_bytes{index="_all"}': 104857600,
+            'total_refresh_total{index="_all"}': 3,
+            'total_refresh_total_time_in_millis{index="_all"}': 107,
+            'total_flush_total{index="_all"}': 0,
+            'total_flush_total_time_in_millis{index="_all"}': 0,
+            'total_warmer_current{index="_all"}': 0,
+            'total_warmer_total{index="_all"}': 8,
+            'total_warmer_total_time_in_millis{index="_all"}': 6,
+            'total_query_cache_memory_size_in_bytes{index="_all"}': 0,
+            'total_query_cache_total_count{index="_all"}': 0,
+            'total_query_cache_hit_count{index="_all"}': 0,
+            'total_query_cache_miss_count{index="_all"}': 0,
+            'total_query_cache_cache_size{index="_all"}': 0,
+            'total_query_cache_cache_count{index="_all"}': 0,
+            'total_query_cache_evictions{index="_all"}': 0,
+            'total_fielddata_memory_size_in_bytes{index="_all"}': 0,
+            'total_fielddata_evictions{index="_all"}': 0,
+            'total_fielddata_fields_memory_size_in_bytes{index="_all",field="group1"}': 1024,
+            'total_fielddata_fields_memory_size_in_bytes{index="_all",field="group2"}': 2048,
+            'total_completion_size_in_bytes{index="_all"}': 0,
+            'total_segments_count{index="_all"}': 3,
+            'total_segments_memory_in_bytes{index="_all"}': 7908,
+            'total_segments_terms_memory_in_bytes{index="_all"}': 5976,
+            'total_segments_stored_fields_memory_in_bytes{index="_all"}': 936,
+            'total_segments_term_vectors_memory_in_bytes{index="_all"}': 0,
+            'total_segments_norms_memory_in_bytes{index="_all"}': 576,
+            'total_segments_points_memory_in_bytes{index="_all"}': 144,
+            'total_segments_doc_values_memory_in_bytes{index="_all"}': 276,
+            'total_segments_index_writer_memory_in_bytes{index="_all"}': 0,
+            'total_segments_version_map_memory_in_bytes{index="_all"}': 0,
+            'total_segments_fixed_bit_set_memory_in_bytes{index="_all"}': 0,
+            'total_segments_max_unsafe_auto_id_timestamp{index="_all"}': -1,
+            'total_translog_operations{index="_all"}': 3,
+            'total_translog_size_in_bytes{index="_all"}': 491,
+            'total_request_cache_memory_size_in_bytes{index="_all"}': 0,
+            'total_request_cache_evictions{index="_all"}': 0,
+            'total_request_cache_hit_count{index="_all"}': 0,
+            'total_request_cache_miss_count{index="_all"}': 0,
+            'total_recovery_current_as_source{index="_all"}': 0,
+            'total_recovery_current_as_target{index="_all"}': 0,
+            'total_recovery_throttle_time_in_millis{index="_all"}': 0,
+        }
+        result = convert_result(parse_response(self.response, parse_indices=False))
+        self.assertEqual(expected, result)
+
+    def test_endpoint_indices(self):
+
+        expected = {
+            'primaries_docs_count{index="foo"}': 3,
+            'primaries_docs_deleted{index="foo"}': 0,
+            'primaries_store_size_in_bytes{index="foo"}': 12690,
+            'primaries_store_throttle_time_in_millis{index="foo"}': 0,
+            'primaries_indexing_index_total{index="foo"}': 3,
+            'primaries_indexing_index_time_in_millis{index="foo"}': 45,
+            'primaries_indexing_index_current{index="foo"}': 0,
+            'primaries_indexing_index_failed{index="foo"}': 0,
+            'primaries_indexing_delete_total{index="foo"}': 0,
+            'primaries_indexing_delete_time_in_millis{index="foo"}': 0,
+            'primaries_indexing_delete_current{index="foo"}': 0,
+            'primaries_indexing_noop_update_total{index="foo"}': 0,
+            'primaries_indexing_is_throttled{index="foo"}': 0,
+            'primaries_indexing_throttle_time_in_millis{index="foo"}': 0,
+            'primaries_get_total{index="foo"}': 0,
+            'primaries_get_time_in_millis{index="foo"}': 0,
+            'primaries_get_exists_total{index="foo"}': 0,
+            'primaries_get_exists_time_in_millis{index="foo"}': 0,
+            'primaries_get_missing_total{index="foo"}': 0,
+            'primaries_get_missing_time_in_millis{index="foo"}': 0,
+            'primaries_get_current{index="foo"}': 0,
+            'primaries_search_open_contexts{index="foo"}': 0,
+            'primaries_search_query_total{index="foo"}': 0,
+            'primaries_search_query_time_in_millis{index="foo"}': 0,
+            'primaries_search_query_current{index="foo"}': 0,
+            'primaries_search_fetch_total{index="foo"}': 0,
+            'primaries_search_fetch_time_in_millis{index="foo"}': 0,
+            'primaries_search_fetch_current{index="foo"}': 0,
+            'primaries_search_scroll_total{index="foo"}': 0,
+            'primaries_search_scroll_time_in_millis{index="foo"}': 0,
+            'primaries_search_scroll_current{index="foo"}': 0,
+            'primaries_search_suggest_total{index="foo"}': 0,
+            'primaries_search_suggest_time_in_millis{index="foo"}': 0,
+            'primaries_search_suggest_current{index="foo"}': 0,
+            'primaries_merges_current{index="foo"}': 0,
+            'primaries_merges_current_docs{index="foo"}': 0,
+            'primaries_merges_current_size_in_bytes{index="foo"}': 0,
+            'primaries_merges_total{index="foo"}': 0,
+            'primaries_merges_total_time_in_millis{index="foo"}': 0,
+            'primaries_merges_total_docs{index="foo"}': 0,
+            'primaries_merges_total_size_in_bytes{index="foo"}': 0,
+            'primaries_merges_total_stopped_time_in_millis{index="foo"}': 0,
+            'primaries_merges_total_throttled_time_in_millis{index="foo"}': 0,
+            'primaries_merges_total_auto_throttle_in_bytes{index="foo"}': 104857600,
+            'primaries_refresh_total{index="foo"}': 3,
+            'primaries_refresh_total_time_in_millis{index="foo"}': 107,
+            'primaries_flush_total{index="foo"}': 0,
+            'primaries_flush_total_time_in_millis{index="foo"}': 0,
+            'primaries_warmer_current{index="foo"}': 0,
+            'primaries_warmer_total{index="foo"}': 8,
+            'primaries_warmer_total_time_in_millis{index="foo"}': 6,
+            'primaries_query_cache_memory_size_in_bytes{index="foo"}': 0,
+            'primaries_query_cache_total_count{index="foo"}': 0,
+            'primaries_query_cache_hit_count{index="foo"}': 0,
+            'primaries_query_cache_miss_count{index="foo"}': 0,
+            'primaries_query_cache_cache_size{index="foo"}': 0,
+            'primaries_query_cache_cache_count{index="foo"}': 0,
+            'primaries_query_cache_evictions{index="foo"}': 0,
+            'primaries_fielddata_memory_size_in_bytes{index="foo"}': 0,
+            'primaries_fielddata_evictions{index="foo"}': 0,
+            'primaries_fielddata_fields_memory_size_in_bytes{index="foo",field="group1"}': 1024,
+            'primaries_fielddata_fields_memory_size_in_bytes{index="foo",field="group2"}': 2048,
+            'primaries_completion_size_in_bytes{index="foo"}': 0,
+            'primaries_segments_count{index="foo"}': 3,
+            'primaries_segments_memory_in_bytes{index="foo"}': 7908,
+            'primaries_segments_terms_memory_in_bytes{index="foo"}': 5976,
+            'primaries_segments_stored_fields_memory_in_bytes{index="foo"}': 936,
+            'primaries_segments_term_vectors_memory_in_bytes{index="foo"}': 0,
+            'primaries_segments_norms_memory_in_bytes{index="foo"}': 576,
+            'primaries_segments_points_memory_in_bytes{index="foo"}': 144,
+            'primaries_segments_doc_values_memory_in_bytes{index="foo"}': 276,
+            'primaries_segments_index_writer_memory_in_bytes{index="foo"}': 0,
+            'primaries_segments_version_map_memory_in_bytes{index="foo"}': 0,
+            'primaries_segments_fixed_bit_set_memory_in_bytes{index="foo"}': 0,
+            'primaries_segments_max_unsafe_auto_id_timestamp{index="foo"}': -1,
+            'primaries_translog_operations{index="foo"}': 3,
+            'primaries_translog_size_in_bytes{index="foo"}': 491,
+            'primaries_request_cache_memory_size_in_bytes{index="foo"}': 0,
+            'primaries_request_cache_evictions{index="foo"}': 0,
+            'primaries_request_cache_hit_count{index="foo"}': 0,
+            'primaries_request_cache_miss_count{index="foo"}': 0,
+            'primaries_recovery_current_as_source{index="foo"}': 0,
+            'primaries_recovery_current_as_target{index="foo"}': 0,
+            'primaries_recovery_throttle_time_in_millis{index="foo"}': 0,
+            'total_docs_count{index="foo"}': 3,
+            'total_docs_deleted{index="foo"}': 0,
+            'total_store_size_in_bytes{index="foo"}': 12690,
+            'total_store_throttle_time_in_millis{index="foo"}': 0,
+            'total_indexing_index_total{index="foo"}': 3,
+            'total_indexing_index_time_in_millis{index="foo"}': 45,
+            'total_indexing_index_current{index="foo"}': 0,
+            'total_indexing_index_failed{index="foo"}': 0,
+            'total_indexing_delete_total{index="foo"}': 0,
+            'total_indexing_delete_time_in_millis{index="foo"}': 0,
+            'total_indexing_delete_current{index="foo"}': 0,
+            'total_indexing_noop_update_total{index="foo"}': 0,
+            'total_indexing_is_throttled{index="foo"}': 0,
+            'total_indexing_throttle_time_in_millis{index="foo"}': 0,
+            'total_get_total{index="foo"}': 0,
+            'total_get_time_in_millis{index="foo"}': 0,
+            'total_get_exists_total{index="foo"}': 0,
+            'total_get_exists_time_in_millis{index="foo"}': 0,
+            'total_get_missing_total{index="foo"}': 0,
+            'total_get_missing_time_in_millis{index="foo"}': 0,
+            'total_get_current{index="foo"}': 0,
+            'total_search_open_contexts{index="foo"}': 0,
+            'total_search_query_total{index="foo"}': 0,
+            'total_search_query_time_in_millis{index="foo"}': 0,
+            'total_search_query_current{index="foo"}': 0,
+            'total_search_fetch_total{index="foo"}': 0,
+            'total_search_fetch_time_in_millis{index="foo"}': 0,
+            'total_search_fetch_current{index="foo"}': 0,
+            'total_search_scroll_total{index="foo"}': 0,
+            'total_search_scroll_time_in_millis{index="foo"}': 0,
+            'total_search_scroll_current{index="foo"}': 0,
+            'total_search_suggest_total{index="foo"}': 0,
+            'total_search_suggest_time_in_millis{index="foo"}': 0,
+            'total_search_suggest_current{index="foo"}': 0,
+            'total_merges_current{index="foo"}': 0,
+            'total_merges_current_docs{index="foo"}': 0,
+            'total_merges_current_size_in_bytes{index="foo"}': 0,
+            'total_merges_total{index="foo"}': 0,
+            'total_merges_total_time_in_millis{index="foo"}': 0,
+            'total_merges_total_docs{index="foo"}': 0,
+            'total_merges_total_size_in_bytes{index="foo"}': 0,
+            'total_merges_total_stopped_time_in_millis{index="foo"}': 0,
+            'total_merges_total_throttled_time_in_millis{index="foo"}': 0,
+            'total_merges_total_auto_throttle_in_bytes{index="foo"}': 104857600,
+            'total_refresh_total{index="foo"}': 3,
+            'total_refresh_total_time_in_millis{index="foo"}': 107,
+            'total_flush_total{index="foo"}': 0,
+            'total_flush_total_time_in_millis{index="foo"}': 0,
+            'total_warmer_current{index="foo"}': 0,
+            'total_warmer_total{index="foo"}': 8,
+            'total_warmer_total_time_in_millis{index="foo"}': 6,
+            'total_query_cache_memory_size_in_bytes{index="foo"}': 0,
+            'total_query_cache_total_count{index="foo"}': 0,
+            'total_query_cache_hit_count{index="foo"}': 0,
+            'total_query_cache_miss_count{index="foo"}': 0,
+            'total_query_cache_cache_size{index="foo"}': 0,
+            'total_query_cache_cache_count{index="foo"}': 0,
+            'total_query_cache_evictions{index="foo"}': 0,
+            'total_fielddata_memory_size_in_bytes{index="foo"}': 0,
+            'total_fielddata_evictions{index="foo"}': 0,
+            'total_fielddata_fields_memory_size_in_bytes{index="foo",field="group1"}': 1024,
+            'total_fielddata_fields_memory_size_in_bytes{index="foo",field="group2"}': 2048,
+            'total_completion_size_in_bytes{index="foo"}': 0,
+            'total_segments_count{index="foo"}': 3,
+            'total_segments_memory_in_bytes{index="foo"}': 7908,
+            'total_segments_terms_memory_in_bytes{index="foo"}': 5976,
+            'total_segments_stored_fields_memory_in_bytes{index="foo"}': 936,
+            'total_segments_term_vectors_memory_in_bytes{index="foo"}': 0,
+            'total_segments_norms_memory_in_bytes{index="foo"}': 576,
+            'total_segments_points_memory_in_bytes{index="foo"}': 144,
+            'total_segments_doc_values_memory_in_bytes{index="foo"}': 276,
+            'total_segments_index_writer_memory_in_bytes{index="foo"}': 0,
+            'total_segments_version_map_memory_in_bytes{index="foo"}': 0,
+            'total_segments_fixed_bit_set_memory_in_bytes{index="foo"}': 0,
+            'total_segments_max_unsafe_auto_id_timestamp{index="foo"}': -1,
+            'total_translog_operations{index="foo"}': 3,
+            'total_translog_size_in_bytes{index="foo"}': 491,
+            'total_request_cache_memory_size_in_bytes{index="foo"}': 0,
+            'total_request_cache_evictions{index="foo"}': 0,
+            'total_request_cache_hit_count{index="foo"}': 0,
+            'total_request_cache_miss_count{index="foo"}': 0,
+            'total_recovery_current_as_source{index="foo"}': 0,
+            'total_recovery_current_as_target{index="foo"}': 0,
+            'total_recovery_throttle_time_in_millis{index="foo"}': 0,
+        }
+        result = convert_result(parse_response(self.response, parse_indices=True))
+        self.assertEqual(expected, result)
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/tests/test_nodes_stats_parser.py b/tests/test_nodes_stats_parser.py
new file mode 100644
index 0000000..3432b7c
--- /dev/null
+++ b/tests/test_nodes_stats_parser.py
@@ -0,0 +1,748 @@
+import unittest
+
+from prometheus_es_exporter.nodes_stats_parser import parse_response
+from tests.utils import convert_result
+
+
+# Sample responses generated by querying the endpoint on a Elasticsearch
+# server populated with the following data (http command = Httpie utility):
+# > http -v POST localhost:9200/foo/bar/1 val:=1 group1=a group2=a
+# > http -v POST localhost:9200/foo/bar/2 val:=2 group1=a group2=b
+# > http -v POST localhost:9200/foo/bar/3 val:=3 group1=b group2=b
+# Some details are instance specific, so mileage may vary!
+class Test(unittest.TestCase):
+    maxDiff = None
+
+    def test_endpoint(self):
+        # Endpoint: /_nodes/stats?pretty
+        response = {
+            '_nodes': {
+                'total': 1,
+                'successful': 1,
+                'failed': 0
+            },
+            'cluster_name': 'elasticsearch',
+            'nodes': {
+                'bRcKq5zUTAuwNf4qvnXzIQ': {
+                    'timestamp': 1484861642281,
+                    'name': 'bRcKq5z',
+                    'transport_address': '127.0.0.1:9300',
+                    'host': '127.0.0.1',
+                    'ip': '127.0.0.1:9300',
+                    'roles': [
+                        'master',
+                        'data',
+                        'ingest'
+                    ],
+                    'indices': {
+                        'docs': {
+                            'count': 3,
+                            'deleted': 0
+                        },
+                        'store': {
+                            'size_in_bytes': 12972,
+                            'throttle_time_in_millis': 0
+                        },
+                        'indexing': {
+                            'index_total': 3,
+                            'index_time_in_millis': 95,
+                            'index_current': 0,
+                            'index_failed': 0,
+                            'delete_total': 0,
+                            'delete_time_in_millis': 0,
+                            'delete_current': 0,
+                            'noop_update_total': 0,
+                            'is_throttled': False,
+                            'throttle_time_in_millis': 0
+                        },
+                        'get': {
+                            'total': 0,
+                            'time_in_millis': 0,
+                            'exists_total': 0,
+                            'exists_time_in_millis': 0,
+                            'missing_total': 0,
+                            'missing_time_in_millis': 0,
+                            'current': 0
+                        },
+                        'search': {
+                            'open_contexts': 0,
+                            'query_total': 0,
+                            'query_time_in_millis': 0,
+                            'query_current': 0,
+                            'fetch_total': 0,
+                            'fetch_time_in_millis': 0,
+                            'fetch_current': 0,
+                            'scroll_total': 0,
+                            'scroll_time_in_millis': 0,
+                            'scroll_current': 0,
+                            'suggest_total': 0,
+                            'suggest_time_in_millis': 0,
+                            'suggest_current': 0
+                        },
+                        'merges': {
+                            'current': 0,
+                            'current_docs': 0,
+                            'current_size_in_bytes': 0,
+                            'total': 0,
+                            'total_time_in_millis': 0,
+                            'total_docs': 0,
+                            'total_size_in_bytes': 0,
+                            'total_stopped_time_in_millis': 0,
+                            'total_throttled_time_in_millis': 0,
+                            'total_auto_throttle_in_bytes': 104857600
+                        },
+                        'refresh': {
+                            'total': 6,
+                            'total_time_in_millis': 304
+                        },
+                        'flush': {
+                            'total': 3,
+                            'total_time_in_millis': 72
+                        },
+                        'warmer': {
+                            'current': 0,
+                            'total': 14,
+                            'total_time_in_millis': 19
+                        },
+                        'query_cache': {
+                            'memory_size_in_bytes': 0,
+                            'total_count': 0,
+                            'hit_count': 0,
+                            'miss_count': 0,
+                            'cache_size': 0,
+                            'cache_count': 0,
+                            'evictions': 0
+                        },
+                        'fielddata': {
+                            'memory_size_in_bytes': 0,
+                            'evictions': 0
+                        },
+                        'completion': {
+                            'size_in_bytes': 0
+                        },
+                        'segments': {
+                            'count': 3,
+                            'memory_in_bytes': 7908,
+                            'terms_memory_in_bytes': 5976,
+                            'stored_fields_memory_in_bytes': 936,
+                            'term_vectors_memory_in_bytes': 0,
+                            'norms_memory_in_bytes': 576,
+                            'points_memory_in_bytes': 144,
+                            'doc_values_memory_in_bytes': 276,
+                            'index_writer_memory_in_bytes': 0,
+                            'version_map_memory_in_bytes': 0,
+                            'fixed_bit_set_memory_in_bytes': 0,
+                            'max_unsafe_auto_id_timestamp': -1,
+                            'file_sizes': {}
+                        },
+                        'translog': {
+                            'operations': 0,
+                            'size_in_bytes': 215
+                        },
+                        'request_cache': {
+                            'memory_size_in_bytes': 0,
+                            'evictions': 0,
+                            'hit_count': 0,
+                            'miss_count': 0
+                        },
+                        'recovery': {
+                            'current_as_source': 0,
+                            'current_as_target': 0,
+                            'throttle_time_in_millis': 0
+                        }
+                    },
+                    'os': {
+                        'timestamp': 1484861642359,
+                        'cpu': {
+                            'percent': 53,
+                            'load_average': {
+                                '1m': 2.53,
+                                '5m': 2.3,
+                                '15m': 2.23
+                            }
+                        },
+                        'mem': {
+                            'total_in_bytes': 16703762432,
+                            'free_in_bytes': 164323328,
+                            'used_in_bytes': 16539439104,
+                            'free_percent': 1,
+                            'used_percent': 99
+                        },
+                        'swap': {
+                            'total_in_bytes': 17054035968,
+                            'free_in_bytes': 12281872384,
+                            'used_in_bytes': 4772163584
+                        }
+                    },
+                    'process': {
+                        'timestamp': 1484861642360,
+                        'open_file_descriptors': 180,
+                        'max_file_descriptors': 1048576,
+                        'cpu': {
+                            'percent': 0,
+                            'total_in_millis': 28270
+                        },
+                        'mem': {
+                            'total_virtual_in_bytes': 5947977728
+                        }
+                    },
+                    'jvm': {
+                        'timestamp': 1484861642361,
+                        'uptime_in_millis': 614767,
+                        'mem': {
+                            'heap_used_in_bytes': 233688144,
+                            'heap_used_percent': 11,
+                            'heap_committed_in_bytes': 2112618496,
+                            'heap_max_in_bytes': 2112618496,
+                            'non_heap_used_in_bytes': 67167936,
+                            'non_heap_committed_in_bytes': 71741440,
+                            'pools': {
+                                'young': {
+                                    'used_in_bytes': 189809608,
+                                    'max_in_bytes': 279183360,
+                                    'peak_used_in_bytes': 279183360,
+                                    'peak_max_in_bytes': 279183360
+                                },
+                                'survivor': {
+                                    'used_in_bytes': 34865136,
+                                    'max_in_bytes': 34865152,
+                                    'peak_used_in_bytes': 34865136,
+                                    'peak_max_in_bytes': 34865152
+                                },
+                                'old': {
+                                    'used_in_bytes': 9013400,
+                                    'max_in_bytes': 1798569984,
+                                    'peak_used_in_bytes': 9013400,
+                                    'peak_max_in_bytes': 1798569984
+                                }
+                            }
+                        },
+                        'threads': {
+                            'count': 40,
+                            'peak_count': 46
+                        },
+                        'gc': {
+                            'collectors': {
+                                'young': {
+                                    'collection_count': 2,
+                                    'collection_time_in_millis': 189
+                                },
+                                'old': {
+                                    'collection_count': 1,
+                                    'collection_time_in_millis': 143
+                                }
+                            }
+                        },
+                        'buffer_pools': {
+                            'direct': {
+                                'count': 29,
+                                'used_in_bytes': 87069546,
+                                'total_capacity_in_bytes': 87069545
+                            },
+                            'mapped': {
+                                'count': 3,
+                                'used_in_bytes': 9658,
+                                'total_capacity_in_bytes': 9658
+                            }
+                        },
+                        'classes': {
+                            'current_loaded_count': 10236,
+                            'total_loaded_count': 10236,
+                            'total_unloaded_count': 0
+                        }
+                    },
+                    'thread_pool': {
+                        'bulk': {
+                            'threads': 0,
+                            'queue': 0,
+                            'active': 0,
+                            'rejected': 0,
+                            'largest': 0,
+                            'completed': 0
+                        },
+                        'fetch_shard_started': {
+                            'threads': 0,
+                            'queue': 0,
+                            'active': 0,
+                            'rejected': 0,
+                            'largest': 0,
+                            'completed': 0
+                        },
+                        'fetch_shard_store': {
+                            'threads': 0,
+                            'queue': 0,
+                            'active': 0,
+                            'rejected': 0,
+                            'largest': 0,
+                            'completed': 0
+                        },
+                        'flush': {
+                            'threads': 2,
+                            'queue': 0,
+                            'active': 0,
+                            'rejected': 0,
+                            'largest': 2,
+                            'completed': 6
+                        },
+                        'force_merge': {
+                            'threads': 0,
+                            'queue': 0,
+                            'active': 0,
+                            'rejected': 0,
+                            'largest': 0,
+                            'completed': 0
+                        },
+                        'generic': {
+                            'threads': 4,
+                            'queue': 0,
+                            'active': 0,
+                            'rejected': 0,
+                            'largest': 4,
+                            'completed': 73
+                        },
+                        'get': {
+                            'threads': 0,
+                            'queue': 0,
+                            'active': 0,
+                            'rejected': 0,
+                            'largest': 0,
+                            'completed': 0
+                        },
+                        'index': {
+                            'threads': 3,
+                            'queue': 0,
+                            'active': 0,
+                            'rejected': 0,
+                            'largest': 3,
+                            'completed': 3
+                        },
+                        'listener': {
+                            'threads': 0,
+                            'queue': 0,
+                            'active': 0,
+                            'rejected': 0,
+                            'largest': 0,
+                            'completed': 0
+                        },
+                        'management': {
+                            'threads': 3,
+                            'queue': 0,
+                            'active': 1,
+                            'rejected': 0,
+                            'largest': 3,
+                            'completed': 77
+                        },
+                        'refresh': {
+                            'threads': 1,
+                            'queue': 0,
+                            'active': 0,
+                            'rejected': 0,
+                            'largest': 1,
+                            'completed': 588
+                        },
+                        'search': {
+                            'threads': 0,
+                            'queue': 0,
+                            'active': 0,
+                            'rejected': 0,
+                            'largest': 0,
+                            'completed': 0
+                        },
+                        'snapshot': {
+                            'threads': 0,
+                            'queue': 0,
+                            'active': 0,
+                            'rejected': 0,
+                            'largest': 0,
+                            'completed': 0
+                        },
+                        'warmer': {
+                            'threads': 1,
+                            'queue': 0,
+                            'active': 0,
+                            'rejected': 0,
+                            'largest': 1,
+                            'completed': 9
+                        }
+                    },
+                    'fs': {
+                        'timestamp': 1484861642369,
+                        'total': {
+                            'total_in_bytes': 233134567424,
+                            'free_in_bytes': 92206276608,
+                            'available_in_bytes': 80292356096,
+                            'spins': 'true'
+                        },
+                        'data': [
+                            {
+                                'path': '/usr/share/elasticsearch/data/nodes/0',
+                                'mount': '/usr/share/elasticsearch/data (/dev/mapper/ubuntu--vg-root)',
+                                'type': 'ext4',
+                                'total_in_bytes': 233134567424,
+                                'free_in_bytes': 92206276608,
+                                'available_in_bytes': 80292356096,
+                                'spins': 'true'
+                            }
+                        ],
+                        'io_stats': {
+                            'devices': [
+                                {
+                                    'device_name': 'dm-0',
+                                    'operations': 22045,
+                                    'read_operations': 14349,
+                                    'write_operations': 7696,
+                                    'read_kilobytes': 294732,
+                                    'write_kilobytes': 113424
+                                }
+                            ],
+                            'total': {
+                                'operations': 22045,
+                                'read_operations': 14349,
+                                'write_operations': 7696,
+                                'read_kilobytes': 294732,
+                                'write_kilobytes': 113424
+                            }
+                        }
+                    },
+                    'transport': {
+                        'server_open': 0,
+                        'rx_count': 8,
+                        'rx_size_in_bytes': 3607,
+                        'tx_count': 8,
+                        'tx_size_in_bytes': 3607
+                    },
+                    'http': {
+                        'current_open': 1,
+                        'total_opened': 4
+                    },
+                    'breakers': {
+                        'request': {
+                            'limit_size_in_bytes': 1267571097,
+                            'limit_size': '1.1gb',
+                            'estimated_size_in_bytes': 0,
+                            'estimated_size': '0b',
+                            'overhead': 1.0,
+                            'tripped': 0
+                        },
+                        'fielddata': {
+                            'limit_size_in_bytes': 1267571097,
+                            'limit_size': '1.1gb',
+                            'estimated_size_in_bytes': 0,
+                            'estimated_size': '0b',
+                            'overhead': 1.03,
+                            'tripped': 0
+                        },
+                        'in_flight_requests': {
+                            'limit_size_in_bytes': 2112618496,
+                            'limit_size': '1.9gb',
+                            'estimated_size_in_bytes': 0,
+                            'estimated_size': '0b',
+                            'overhead': 1.0,
+                            'tripped': 0
+                        },
+                        'parent': {
+                            'limit_size_in_bytes': 1478832947,
+                            'limit_size': '1.3gb',
+                            'estimated_size_in_bytes': 0,
+                            'estimated_size': '0b',
+                            'overhead': 1.0,
+                            'tripped': 0
+                        }
+                    },
+                    'script': {
+                        'compilations': 0,
+                        'cache_evictions': 0
+                    },
+                    'discovery': {
+                        'cluster_state_queue': {
+                            'total': 0,
+                            'pending': 0,
+                            'committed': 0
+                        }
+                    },
+                    'ingest': {
+                        'total': {
+                            'count': 0,
+                            'time_in_millis': 0,
+                            'current': 0,
+                            'failed': 0
+                        },
+                        'pipelines': {}
+                    }
+                }
+            }
+        }
+
+        expected = {
+            'indices_docs_count{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 3,
+            'indices_docs_deleted{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_store_size_in_bytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 12972,
+            'indices_store_throttle_time_in_millis{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_indexing_index_total{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 3,
+            'indices_indexing_index_time_in_millis{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 95,
+            'indices_indexing_index_current{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_indexing_index_failed{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_indexing_delete_total{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_indexing_delete_time_in_millis{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_indexing_delete_current{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_indexing_noop_update_total{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_indexing_is_throttled{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_indexing_throttle_time_in_millis{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_get_total{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_get_time_in_millis{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_get_exists_total{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_get_exists_time_in_millis{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_get_missing_total{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_get_missing_time_in_millis{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_get_current{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_search_open_contexts{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_search_query_total{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_search_query_time_in_millis{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_search_query_current{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_search_fetch_total{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_search_fetch_time_in_millis{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_search_fetch_current{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_search_scroll_total{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_search_scroll_time_in_millis{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_search_scroll_current{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_search_suggest_total{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_search_suggest_time_in_millis{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_search_suggest_current{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_merges_current{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_merges_current_docs{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_merges_current_size_in_bytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_merges_total{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_merges_total_time_in_millis{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_merges_total_docs{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_merges_total_size_in_bytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_merges_total_stopped_time_in_millis{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_merges_total_throttled_time_in_millis{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'indices_merges_total_auto_throttle_in_bytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 104857600,
+            'indices_refresh_total{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 6,
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+            'thread_pool_active{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="listener"}': 0,
+            'thread_pool_rejected{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="listener"}': 0,
+            'thread_pool_largest{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="listener"}': 0,
+            'thread_pool_completed{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="listener"}': 0,
+            'thread_pool_threads{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="management"}': 3,
+            'thread_pool_queue{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="management"}': 0,
+            'thread_pool_active{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="management"}': 1,
+            'thread_pool_rejected{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="management"}': 0,
+            'thread_pool_largest{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="management"}': 3,
+            'thread_pool_completed{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="management"}': 77,
+            'thread_pool_threads{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="refresh"}': 1,
+            'thread_pool_queue{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="refresh"}': 0,
+            'thread_pool_active{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="refresh"}': 0,
+            'thread_pool_rejected{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="refresh"}': 0,
+            'thread_pool_largest{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="refresh"}': 1,
+            'thread_pool_completed{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="refresh"}': 588,
+            'thread_pool_threads{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="search"}': 0,
+            'thread_pool_queue{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="search"}': 0,
+            'thread_pool_active{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="search"}': 0,
+            'thread_pool_rejected{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="search"}': 0,
+            'thread_pool_largest{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="search"}': 0,
+            'thread_pool_completed{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="search"}': 0,
+            'thread_pool_threads{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="snapshot"}': 0,
+            'thread_pool_queue{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="snapshot"}': 0,
+            'thread_pool_active{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="snapshot"}': 0,
+            'thread_pool_rejected{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="snapshot"}': 0,
+            'thread_pool_largest{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="snapshot"}': 0,
+            'thread_pool_completed{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="snapshot"}': 0,
+            'thread_pool_threads{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="warmer"}': 1,
+            'thread_pool_rejected{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="warmer"}': 0,
+            'thread_pool_active{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="warmer"}': 0,
+            'thread_pool_queue{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="warmer"}': 0,
+            'thread_pool_largest{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="warmer"}': 1,
+            'thread_pool_completed{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",thread_pool="warmer"}': 9,
+            'fs_total_total_in_bytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 233134567424,
+            'fs_total_free_in_bytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 92206276608,
+            'fs_total_available_in_bytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 80292356096,
+            'fs_data_total_in_bytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",path="/usr/share/elasticsearch/data/nodes/0"}': 233134567424,
+            'fs_data_free_in_bytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",path="/usr/share/elasticsearch/data/nodes/0"}': 92206276608,
+            'fs_data_available_in_bytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",path="/usr/share/elasticsearch/data/nodes/0"}': 80292356096,
+            'fs_io_stats_devices_operations{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",device_name="dm-0"}': 22045,
+            'fs_io_stats_devices_read_operations{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",device_name="dm-0"}': 14349,
+            'fs_io_stats_devices_write_operations{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",device_name="dm-0"}': 7696,
+            'fs_io_stats_devices_read_kilobytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",device_name="dm-0"}': 294732,
+            'fs_io_stats_devices_write_kilobytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z",device_name="dm-0"}': 113424,
+            'fs_io_stats_total_operations{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 22045,
+            'fs_io_stats_total_read_operations{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 14349,
+            'fs_io_stats_total_write_operations{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 7696,
+            'fs_io_stats_total_read_kilobytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 294732,
+            'fs_io_stats_total_write_kilobytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 113424,
+            'transport_server_open{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'transport_rx_count{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 8,
+            'transport_rx_size_in_bytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 3607,
+            'transport_tx_count{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 8,
+            'transport_tx_size_in_bytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 3607,
+            'http_current_open{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 1,
+            'http_total_opened{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 4,
+            'breakers_request_limit_size_in_bytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 1267571097,
+            'breakers_request_estimated_size_in_bytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'breakers_request_overhead{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 1.0,
+            'breakers_request_tripped{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'breakers_fielddata_limit_size_in_bytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 1267571097,
+            'breakers_fielddata_estimated_size_in_bytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'breakers_fielddata_overhead{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 1.03,
+            'breakers_fielddata_tripped{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'breakers_in_flight_requests_limit_size_in_bytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 2112618496,
+            'breakers_in_flight_requests_estimated_size_in_bytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'breakers_in_flight_requests_overhead{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 1.0,
+            'breakers_in_flight_requests_tripped{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'breakers_parent_limit_size_in_bytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 1478832947,
+            'breakers_parent_estimated_size_in_bytes{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'breakers_parent_overhead{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 1.0,
+            'breakers_parent_tripped{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'script_compilations{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'script_cache_evictions{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'discovery_cluster_state_queue_total{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'discovery_cluster_state_queue_pending{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'discovery_cluster_state_queue_committed{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'ingest_total_count{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'ingest_total_time_in_millis{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'ingest_total_current{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+            'ingest_total_failed{node_id="bRcKq5zUTAuwNf4qvnXzIQ",node_name="bRcKq5z"}': 0,
+        }
+        result = convert_result(parse_response(response))
+        self.assertEqual(expected, result)
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/tests/test_parser.py b/tests/test_parser.py
new file mode 100644
index 0000000..ed5de99
--- /dev/null
+++ b/tests/test_parser.py
@@ -0,0 +1,778 @@
+import unittest
+
+from prometheus_es_exporter.parser import parse_response
+from tests.utils import convert_result
+
+
+# Sample responses generated by running the provided queries on a Elasticsearch
+# server populated with the following data (http command = Httpie utility):
+# > http -v POST localhost:9200/foo/bar/1 val:=1 group1=a group2=a
+# > http -v POST localhost:9200/foo/bar/2 val:=2 group1=a group2=b
+# > http -v POST localhost:9200/foo/bar/3 val:=3 group1=b group2=b
+class Test(unittest.TestCase):
+    maxDiff = None
+
+    def test_query(self):
+        # Query:
+        # {
+        #     "size": 0,
+        #     "query": {
+        #         "match_all": {}
+        #     }
+        # }
+        response = {
+            "_shards": {
+                "failed": 0,
+                "successful": 5,
+                "total": 5
+            },
+            "hits": {
+                "hits": [],
+                "max_score": 0.0,
+                "total": 3
+            },
+            "timed_out": False,
+            "took": 1
+        }
+
+        expected = {
+            'hits': 3,
+            'took_milliseconds': 1
+        }
+        result = convert_result(parse_response(response))
+        self.assertEqual(expected, result)
+
+    # effectively tests other singe-value metrics: max,min,sum,cardinality
+    def test_avg(self):
+        # Query:
+        # {
+        #     "size": 0,
+        #     "query": {
+        #         "match_all": {}
+        #     },
+        #     "aggs": {
+        #         "val_avg": {
+        #             "avg": {"field": "val"}
+        #         }
+        #     }
+        # }
+        response = {
+            "_shards": {
+                "failed": 0,
+                "successful": 5,
+                "total": 5
+            },
+            "aggregations": {
+                "val_avg": {
+                    "value": 2.0
+                }
+            },
+            "hits": {
+                "hits": [],
+                "max_score": 0.0,
+                "total": 3
+            },
+            "timed_out": False,
+            "took": 1
+        }
+
+        expected = {
+            'hits': 3,
+            'took_milliseconds': 1,
+            'val_avg_value': 2
+        }
+        result = convert_result(parse_response(response))
+        self.assertEqual(expected, result)
+
+    # effecively tests other mult-value metrics: percentile_ranks
+    def test_percentiles(self):
+        # Query:
+        # {
+        #     "size": 0,
+        #     "query": {
+        #         "match_all": {}
+        #     },
+        #     "aggs": {
+        #         "val_percentiles": {
+        #             "percentiles": {"field": "val"}
+        #         }
+        #     }
+        # }
+        response = {
+            "_shards": {
+                "failed": 0,
+                "successful": 5,
+                "total": 5
+            },
+            "aggregations": {
+                "val_percentiles": {
+                    "values": {
+                        "1.0": 1.02,
+                        "25.0": 1.5,
+                        "5.0": 1.1,
+                        "50.0": 2.0,
+                        "75.0": 2.5,
+                        "95.0": 2.9,
+                        "99.0": 2.98
+                    }
+                }
+            },
+            "hits": {
+                "hits": [],
+                "max_score": 0.0,
+                "total": 3
+            },
+            "timed_out": False,
+            "took": 1
+        }
+
+        expected = {
+            'hits': 3,
+            'took_milliseconds': 1,
+            'val_percentiles_values_1_0': 1.02,
+            'val_percentiles_values_5_0': 1.1,
+            'val_percentiles_values_25_0': 1.5,
+            'val_percentiles_values_50_0': 2.0,
+            'val_percentiles_values_75_0': 2.5,
+            'val_percentiles_values_95_0': 2.9,
+            'val_percentiles_values_99_0': 2.98
+        }
+        result = convert_result(parse_response(response))
+        self.assertEqual(expected, result)
+
+    def test_stats(self):
+        # Query:
+        # {
+        #     "size": 0,
+        #     "query": {
+        #         "match_all": {}
+        #     },
+        #     "aggs": {
+        #         "val_stats": {
+        #             "stats": {"field": "val"}
+        #         }
+        #     }
+        # }
+        response = {
+            "_shards": {
+                "failed": 0,
+                "successful": 5,
+                "total": 5
+            },
+            "aggregations": {
+                "val_stats": {
+                    "avg": 2.0,
+                    "count": 3,
+                    "max": 3.0,
+                    "min": 1.0,
+                    "sum": 6.0
+                }
+            },
+            "hits": {
+                "hits": [],
+                "max_score": 0.0,
+                "total": 3
+            },
+            "timed_out": False,
+            "took": 1
+        }
+
+        expected = {
+            'hits': 3,
+            'took_milliseconds': 1,
+            'val_stats_avg': 2.0,
+            'val_stats_count': 3,
+            'val_stats_max': 3.0,
+            'val_stats_min': 1.0,
+            'val_stats_sum': 6.0
+        }
+        result = convert_result(parse_response(response))
+        self.assertEqual(expected, result)
+
+    def test_extended_stats(self):
+        # Query:
+        # {
+        #     "size": 0,
+        #     "query": {
+        #         "match_all": {}
+        #     },
+        #     "aggs": {
+        #         "val_extended_stats": {
+        #             "extended_stats": {"field": "val"}
+        #         }
+        #     }
+        # }
+        response = {
+            "_shards": {
+                "failed": 0,
+                "successful": 5,
+                "total": 5
+            },
+            "aggregations": {
+                "val_extended_stats": {
+                    "avg": 2.0,
+                    "count": 3,
+                    "max": 3.0,
+                    "min": 1.0,
+                    "std_deviation": 0.816496580927726,
+                    "std_deviation_bounds": {
+                        "lower": 0.36700683814454793,
+                        "upper": 3.632993161855452
+                    },
+                    "sum": 6.0,
+                    "sum_of_squares": 14.0,
+                    "variance": 0.6666666666666666
+                }
+            },
+            "hits": {
+                "hits": [],
+                "max_score": 0.0,
+                "total": 3
+            },
+            "timed_out": False,
+            "took": 1
+        }
+
+        expected = {
+            'hits': 3,
+            'took_milliseconds': 1,
+            'val_extended_stats_avg': 2.0,
+            'val_extended_stats_count': 3,
+            'val_extended_stats_max': 3.0,
+            'val_extended_stats_min': 1.0,
+            'val_extended_stats_sum': 6.0,
+            'val_extended_stats_std_deviation': 0.816496580927726,
+            'val_extended_stats_std_deviation_bounds_lower': 0.36700683814454793,
+            'val_extended_stats_std_deviation_bounds_upper': 3.632993161855452,
+            'val_extended_stats_sum_of_squares': 14.0,
+            'val_extended_stats_variance': 0.6666666666666666
+
+        }
+        result = convert_result(parse_response(response))
+        self.assertEqual(expected, result)
+
+    def test_filter(self):
+        # Query:
+        # {
+        #     "size": 0,
+        #     "query": {
+        #         "match_all": {}
+        #     },
+        #     "aggs": {
+        #         "group1_filter": {
+        #             "filter": {"term": {"group1": "a"}},
+        #             "aggs": {
+        #                 "val_sum": {
+        #                     "sum": {"field": "val"}
+        #                 }
+        #             }
+        #         }
+        #     }
+        # }
+        response = {
+            "_shards": {
+                "failed": 0,
+                "successful": 5,
+                "total": 5
+            },
+            "aggregations": {
+                "group1_filter": {
+                    "doc_count": 2,
+                    "val_sum": {
+                        "value": 3.0
+                    }
+                }
+            },
+            "hits": {
+                "hits": [],
+                "max_score": 0.0,
+                "total": 3
+            },
+            "timed_out": False,
+            "took": 1
+        }
+
+        expected = {
+            'hits': 3,
+            'took_milliseconds': 1,
+            'group1_filter_doc_count': 2,
+            'group1_filter_val_sum_value': 3.0
+        }
+        result = convert_result(parse_response(response))
+        self.assertEqual(expected, result)
+
+    def test_filters(self):
+        # Query:
+        # {
+        #     "size": 0,
+        #     "query": {
+        #         "match_all": {}
+        #     },
+        #     "aggs": {
+        #         "group_filter": {
+        #             "filters": {
+        #                 "filters": {
+        #                     "group_a": {"term": {"group1": "a"}},
+        #                     "group_b": {"term": {"group1": "b"}}
+        #                 }
+        #             },
+        #             "aggs": {
+        #                 "val_sum": {
+        #                     "sum": {"field": "val"}
+        #                 }
+        #             }
+        #         }
+        #     }
+        # }
+        response = {
+            "_shards": {
+                "failed": 0,
+                "successful": 5,
+                "total": 5
+            },
+            "aggregations": {
+                "group_filter": {
+                    "buckets": {
+                        "group_a": {
+                            "doc_count": 2,
+                            "val_sum": {
+                                "value": 3.0
+                            }
+                        },
+                        "group_b": {
+                            "doc_count": 1,
+                            "val_sum": {
+                                "value": 3.0
+                            }
+                        }
+                    }
+                }
+            },
+            "hits": {
+                "hits": [],
+                "max_score": 0.0,
+                "total": 3
+            },
+            "timed_out": False,
+            "took": 1
+        }
+
+        expected = {
+            'hits': 3,
+            'took_milliseconds': 1,
+            'group_filter_doc_count{group_filter="group_a"}': 2,
+            'group_filter_doc_count{group_filter="group_b"}': 1,
+            'group_filter_val_sum_value{group_filter="group_a"}': 3.0,
+            'group_filter_val_sum_value{group_filter="group_b"}': 3.0
+        }
+        result = convert_result(parse_response(response))
+        self.assertEqual(expected, result)
+
+    def test_filters_anonymous(self):
+        # Query:
+        # {
+        #     "size": 0,
+        #     "query": {
+        #         "match_all": {}
+        #     },
+        #     "aggs": {
+        #         "group_filter": {
+        #             "filters": {
+        #                 "filters": [
+        #                     {"term": {"group1": "a"}},
+        #                     {"term": {"group1": "b"}}
+        #                 ]
+        #             },
+        #             "aggs": {
+        #                 "val_sum": {
+        #                     "sum": {"field": "val"}
+        #                 }
+        #             }
+        #         }
+        #     }
+        # }
+        response = {
+            "_shards": {
+                "failed": 0,
+                "successful": 5,
+                "total": 5
+            },
+            "aggregations": {
+                "group_filter": {
+                    "buckets": [
+                        {
+                            "doc_count": 2,
+                            "val_sum": {
+                                "value": 3.0
+                            }
+                        },
+                        {
+                            "doc_count": 1,
+                            "val_sum": {
+                                "value": 3.0
+                            }
+                        }
+                    ]
+                }
+            },
+            "hits": {
+                "hits": [],
+                "max_score": 0.0,
+                "total": 3
+            },
+            "timed_out": False,
+            "took": 1
+        }
+
+        expected = {
+            'hits': 3,
+            'took_milliseconds': 1,
+            'group_filter_doc_count{group_filter="filter_0"}': 2,
+            'group_filter_doc_count{group_filter="filter_1"}': 1,
+            'group_filter_val_sum_value{group_filter="filter_0"}': 3.0,
+            'group_filter_val_sum_value{group_filter="filter_1"}': 3.0
+        }
+        result = convert_result(parse_response(response))
+        self.assertEqual(expected, result)
+
+    def test_terms(self):
+        # Query:
+        # {
+        #     "size": 0,
+        #     "query": {
+        #         "match_all": {}
+        #     },
+        #     "aggs": {
+        #         "group1_term": {
+        #             "terms": {"field": "group1"},
+        #             "aggs": {
+        #                 "val_sum": {
+        #                     "sum": {"field": "val"}
+        #                 }
+        #             }
+        #         }
+        #     }
+        # }
+        response = {
+            "_shards": {
+                "failed": 0,
+                "successful": 5,
+                "total": 5
+            },
+            "aggregations": {
+                "group1_term": {
+                    "buckets": [
+                        {
+                            "doc_count": 2,
+                            "key": "a",
+                            "val_sum": {
+                                "value": 3.0
+                            }
+                        },
+                        {
+                            "doc_count": 1,
+                            "key": "b",
+                            "val_sum": {
+                                "value": 3.0
+                            }
+                        }
+                    ],
+                    "doc_count_error_upper_bound": 0,
+                    "sum_other_doc_count": 0
+                }
+            },
+            "hits": {
+                "hits": [],
+                "max_score": 0.0,
+                "total": 3
+            },
+            "timed_out": False,
+            "took": 2
+        }
+
+        expected = {
+            'hits': 3,
+            'took_milliseconds': 2,
+            'group1_term_doc_count_error_upper_bound': 0,
+            'group1_term_sum_other_doc_count': 0,
+            'group1_term_doc_count{group1_term="a"}': 2,
+            'group1_term_val_sum_value{group1_term="a"}': 3.0,
+            'group1_term_doc_count{group1_term="b"}': 1,
+            'group1_term_val_sum_value{group1_term="b"}': 3.0
+        }
+        result = convert_result(parse_response(response))
+        self.assertEqual(expected, result)
+
+    def test_terms_numeric(self):
+        # Query:
+        # {
+        #     "size": 0,
+        #     "query": {
+        #         "match_all": {}
+        #     },
+        #     "aggs": {
+        #         "val_terms": {
+        #             "terms": {"field": "val"},
+        #             "aggs": {
+        #                 "val_sum": {
+        #                     "sum": {"field": "val"}
+        #                 }
+        #             }
+        #         }
+        #     }
+        # }
+        response = {
+            "_shards": {
+                "total": 5,
+                "successful": 5,
+                "failed": 0
+            },
+            "aggregations": {
+                "val_terms": {
+                    "doc_count_error_upper_bound": 0,
+                    "sum_other_doc_count": 0,
+                    "buckets": [
+                        {
+                            "key": 1,
+                            "doc_count": 1,
+                            "val_sum": {
+                                "value": 1.0
+                            }
+                        },
+                        {
+                            "key": 2,
+                            "doc_count": 1,
+                            "val_sum": {
+                                "value": 2.0
+                            }
+                        },
+                        {
+                            "key": 3,
+                            "doc_count": 1,
+                            "val_sum": {
+                                "value": 3.0
+                            }
+                        }
+                    ]
+                }
+            },
+            "hits": {
+                "total": 3,
+                "max_score": 0.0,
+                "hits": []
+            },
+            "timed_out": False,
+            "took": 4
+        }
+
+        expected = {
+            'hits': 3,
+            'took_milliseconds': 4,
+            'val_terms_doc_count_error_upper_bound': 0,
+            'val_terms_sum_other_doc_count': 0,
+            'val_terms_doc_count{val_terms="1"}': 1,
+            'val_terms_val_sum_value{val_terms="1"}': 1.0,
+            'val_terms_doc_count{val_terms="2"}': 1,
+            'val_terms_val_sum_value{val_terms="2"}': 2.0,
+            'val_terms_doc_count{val_terms="3"}': 1,
+            'val_terms_val_sum_value{val_terms="3"}': 3.0
+        }
+        result = convert_result(parse_response(response))
+        self.assertEqual(expected, result)
+
+    def test_nested_terms(self):
+        # Query:
+        # {
+        #     "size": 0,
+        #     "query": {
+        #         "match_all": {}
+        #     },
+        #     "aggs": {
+        #         "group1_term": {
+        #             "terms": {"field": "group1"},
+        #             "aggs": {
+        #                 "val_sum": {
+        #                     "sum": {"field": "val"}
+        #                 },
+        #                 "group2_term": {
+        #                     "terms": {"field": "group2"},
+        #                     "aggs": {
+        #                         "val_sum": {
+        #                             "sum": {"field": "val"}
+        #                         }
+        #                     }
+        #                 }
+        #             }
+        #         }
+        #     }
+        # }
+        response = {
+            "_shards": {
+                "failed": 0,
+                "successful": 5,
+                "total": 5
+            },
+            "aggregations": {
+                "group1_term": {
+                    "buckets": [
+                        {
+                            "doc_count": 2,
+                            "group2_term": {
+                                "buckets": [
+                                    {
+                                        "doc_count": 1,
+                                        "key": "a",
+                                        "val_sum": {
+                                            "value": 1.0
+                                        }
+                                    },
+                                    {
+                                        "doc_count": 1,
+                                        "key": "b",
+                                        "val_sum": {
+                                            "value": 2.0
+                                        }
+                                    }
+                                ],
+                                "doc_count_error_upper_bound": 0,
+                                "sum_other_doc_count": 0
+                            },
+                            "key": "a",
+                            "val_sum": {
+                                "value": 3.0
+                            }
+                        },
+                        {
+                            "doc_count": 1,
+                            "group2_term": {
+                                "buckets": [
+                                    {
+                                        "doc_count": 1,
+                                        "key": "b",
+                                        "val_sum": {
+                                            "value": 3.0
+                                        }
+                                    }
+                                ],
+                                "doc_count_error_upper_bound": 0,
+                                "sum_other_doc_count": 0
+                            },
+                            "key": "b",
+                            "val_sum": {
+                                "value": 3.0
+                            }
+                        }
+                    ],
+                    "doc_count_error_upper_bound": 0,
+                    "sum_other_doc_count": 0
+                }
+            },
+            "hits": {
+                "hits": [],
+                "max_score": 0.0,
+                "total": 3
+            },
+            "timed_out": False,
+            "took": 2
+        }
+
+        expected = {
+            'hits': 3,
+            'took_milliseconds': 2,
+            'group1_term_doc_count_error_upper_bound': 0,
+            'group1_term_sum_other_doc_count': 0,
+            'group1_term_doc_count{group1_term="a"}': 2,
+            'group1_term_val_sum_value{group1_term="a"}': 3.0,
+            'group1_term_group2_term_doc_count_error_upper_bound{group1_term="a"}': 0,
+            'group1_term_group2_term_sum_other_doc_count{group1_term="a"}': 0,
+            'group1_term_group2_term_doc_count{group1_term="a",group2_term="a"}': 1,
+            'group1_term_group2_term_val_sum_value{group1_term="a",group2_term="a"}': 1.0,
+            'group1_term_group2_term_doc_count{group1_term="a",group2_term="b"}': 1,
+            'group1_term_group2_term_val_sum_value{group1_term="a",group2_term="b"}': 2.0,
+            'group1_term_doc_count{group1_term="b"}': 1,
+            'group1_term_val_sum_value{group1_term="b"}': 3.0,
+            'group1_term_group2_term_doc_count_error_upper_bound{group1_term="b"}': 0,
+            'group1_term_group2_term_sum_other_doc_count{group1_term="b"}': 0,
+            'group1_term_group2_term_doc_count{group1_term="b",group2_term="b"}': 1,
+            'group1_term_group2_term_val_sum_value{group1_term="b",group2_term="b"}': 3.0,
+        }
+        result = convert_result(parse_response(response))
+        self.assertEqual(expected, result)
+
+    # Tests handling of disallowed characters in labels and metric names
+    # The '-'s in the aggregation name aren't allowed in metric names or
+    # label keys, so need to be substituted.
+    # The number at the start of the aggregation name isn't allowed at
+    # the start of metric names or label keys.
+    # A double '_' at the start of the label key (post substitutions)
+    # is also not allowed.
+    def test_bad_chars(self):
+        # Query:
+        # {
+        #     "size": 0,
+        #     "query": {
+        #         "match_all": {}
+        #     },
+        #     "aggs": {
+        #         "1-group-filter-1": {
+        #             "filters": {
+        #                 "filters": {
+        #                     "group_a": {"term": {"group1": "a"}},
+        #                     "group_b": {"term": {"group1": "b"}}
+        #                 }
+        #             },
+        #             "aggs": {
+        #                 "val_sum": {
+        #                     "sum": {"field": "val"}
+        #                 }
+        #             }
+        #         }
+        #     }
+        # }
+        response = {
+            "_shards": {
+                "failed": 0,
+                "successful": 5,
+                "total": 5
+            },
+            "aggregations": {
+                "1-group-filter-1": {
+                    "buckets": {
+                        "group_a": {
+                            "doc_count": 2,
+                            "val_sum": {
+                                "value": 3.0
+                            }
+                        },
+                        "group_b": {
+                            "doc_count": 1,
+                            "val_sum": {
+                                "value": 3.0
+                            }
+                        }
+                    }
+                }
+            },
+            "hits": {
+                "hits": [],
+                "max_score": 0.0,
+                "total": 3
+            },
+            "timed_out": False,
+            "took": 1
+        }
+
+        expected = {
+            'hits': 3,
+            'took_milliseconds': 1,
+            '__group_filter_1_doc_count{_group_filter_1="group_a"}': 2,
+            '__group_filter_1_doc_count{_group_filter_1="group_b"}': 1,
+            '__group_filter_1_val_sum_value{_group_filter_1="group_a"}': 3.0,
+            '__group_filter_1_val_sum_value{_group_filter_1="group_b"}': 3.0
+        }
+        result = convert_result(parse_response(response))
+        self.assertEqual(expected, result)
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/tests/utils.py b/tests/utils.py
new file mode 100644
index 0000000..c81177f
--- /dev/null
+++ b/tests/utils.py
@@ -0,0 +1,36 @@
+from prometheus_es_exporter import group_metrics
+
+
+def format_label(key, value):
+    return key + '="' + value + '"'
+
+
+def format_metrics(metric_name, label_keys, value_dict):
+    metrics = {}
+
+    for label_values, value in value_dict.items():
+        if len(label_keys) > 0:
+            # sorted_keys = sorted(label_keys)
+            labels = '{'
+            labels += ','.join([format_label(label_keys[i], label_values[i])
+                                for i in range(len(label_keys))])
+            labels += '}'
+        else:
+            labels = ''
+
+        metrics[metric_name + labels] = value
+
+    return metrics
+
+
+# Converts the parse_response() result into a psuedo-prometheus format
+# that is useful for comparing results in tests.
+# Uses the 'group_metrics()' function used by the exporter, so effectively
+# tests that function.
+def convert_result(result):
+    metric_dict = group_metrics(result)
+    return {
+        metric: value
+        for metric_name, (label_keys, value_dict) in metric_dict.items()
+        for metric, value in format_metrics(metric_name, label_keys, value_dict).items()
+    }