Assert extensions match in config file and server

If an API extension is enabled in tempest config file, we want
to ensure the extension is present in neutron server.
In before, we occasionally ran into issues that the list of
extensions is mismatch, which leads to failure of test cases.
This patch adds a test case to check that.

Change-Id: I4c59f407c30020e3865e96e67a1b61361e699014
diff --git a/neutron_tempest_plugin/api/test_extensions.py b/neutron_tempest_plugin/api/test_extensions.py
index 1462ae1..5b7fe67 100644
--- a/neutron_tempest_plugin/api/test_extensions.py
+++ b/neutron_tempest_plugin/api/test_extensions.py
@@ -11,31 +11,46 @@
 #    under the License.
 
 from tempest.common import utils
+from tempest import config
 from tempest.lib import decorators
 
 from neutron_tempest_plugin.api import base
 
 
+CONF = config.CONF
+
+
 class ExtensionsTest(base.BaseNetworkTest):
 
-    def _test_list_extensions_includes(self, ext):
+    def _test_list_extensions_includes(self, exts):
         body = self.client.list_extensions()
         extensions = {ext_['alias'] for ext_ in body['extensions']}
         self.assertNotEmpty(extensions, "Extension list returned is empty")
-        ext_enabled = utils.is_extension_enabled(ext, "network")
-        if ext_enabled:
-            self.assertIn(ext, extensions)
-        else:
-            self.assertNotIn(ext, extensions)
+        for ext in exts:
+            ext_enabled = utils.is_extension_enabled(ext, "network")
+            if ext_enabled:
+                self.assertIn(ext, extensions)
+            else:
+                self.assertNotIn(ext, extensions)
 
     @decorators.idempotent_id('262420b7-a4bb-4a3e-b4b5-e73bad18df8c')
     def test_list_extensions_sorting(self):
-        self._test_list_extensions_includes('sorting')
+        self._test_list_extensions_includes(['sorting'])
 
     @decorators.idempotent_id('19db409e-a23f-445d-8bc8-ca3d64c84706')
     def test_list_extensions_pagination(self):
-        self._test_list_extensions_includes('pagination')
+        self._test_list_extensions_includes(['pagination'])
 
     @decorators.idempotent_id('155b7bc2-e358-4dd8-bf3e-1774c084567f')
     def test_list_extensions_project_id(self):
-        self._test_list_extensions_includes('project-id')
+        self._test_list_extensions_includes(['project-id'])
+
+    @decorators.idempotent_id('c7597fac-2404-45b1-beb4-523c8b1d4604')
+    def test_list_extensions_includes_all(self):
+        extensions = CONF.network_feature_enabled.api_extensions
+        if not extensions:
+            raise self.skipException("Extension list is empty")
+        if extensions[0] == 'all':
+            raise self.skipException("No lists of enabled extensions provided")
+
+        self._test_list_extensions_includes(extensions)