Add API tests for Neutron DVR extension

This patch adds a number of positive and negative tests for
the DVR functionality implemented by Neutron.

Change-Id: I6d3fbf7c480c23a4500af115891f63ea058dcfac
diff --git a/tempest/api/network/base.py b/tempest/api/network/base.py
index 09a5555..26a31cb 100644
--- a/tempest/api/network/base.py
+++ b/tempest/api/network/base.py
@@ -263,7 +263,8 @@
 
     @classmethod
     def create_router(cls, router_name=None, admin_state_up=False,
-                      external_network_id=None, enable_snat=None):
+                      external_network_id=None, enable_snat=None,
+                      **kwargs):
         ext_gw_info = {}
         if external_network_id:
             ext_gw_info['network_id'] = external_network_id
@@ -271,7 +272,7 @@
             ext_gw_info['enable_snat'] = enable_snat
         body = cls.client.create_router(
             router_name, external_gateway_info=ext_gw_info,
-            admin_state_up=admin_state_up)
+            admin_state_up=admin_state_up, **kwargs)
         router = body['router']
         cls.routers.append(router)
         return router
diff --git a/tempest/api/network/base_routers.py b/tempest/api/network/base_routers.py
index aa4e200..739e6f9 100644
--- a/tempest/api/network/base_routers.py
+++ b/tempest/api/network/base_routers.py
@@ -21,8 +21,21 @@
     # as some router operations, such as enabling or disabling SNAT
     # require admin credentials by default
 
-    def _delete_router(self, router_id):
-        self.client.delete_router(router_id)
+    def _cleanup_router(self, router):
+        self.delete_router(router)
+        self.routers.remove(router)
+
+    def _create_router(self, name, admin_state_up=False,
+                       external_network_id=None, enable_snat=None):
+        # associate a cleanup with created routers to avoid quota limits
+        router = self.create_router(name, admin_state_up,
+                                    external_network_id, enable_snat)
+        self.addCleanup(self._cleanup_router, router)
+        return router
+
+    def _delete_router(self, router_id, network_client=None):
+        client = network_client or self.client
+        client.delete_router(router_id)
         # Asserting that the router is not found in the list
         # after deletion
         list_body = self.client.list_routers()
diff --git a/tempest/api/network/test_routers.py b/tempest/api/network/test_routers.py
index c6f3849..7c0ab7f 100644
--- a/tempest/api/network/test_routers.py
+++ b/tempest/api/network/test_routers.py
@@ -44,18 +44,6 @@
                            if cls._ip_version == 4 else
                            CONF.network.tenant_network_v6_cidr)
 
-    def _cleanup_router(self, router):
-        self.delete_router(router)
-        self.routers.remove(router)
-
-    def _create_router(self, name, admin_state_up=False,
-                       external_network_id=None, enable_snat=None):
-        # associate a cleanup with created routers to avoid quota limits
-        router = self.create_router(name, admin_state_up,
-                                    external_network_id, enable_snat)
-        self.addCleanup(self._cleanup_router, router)
-        return router
-
     @test.attr(type='smoke')
     @test.idempotent_id('f64403e2-8483-4b34-8ccd-b09a87bcc68c')
     def test_create_show_list_update_delete_router(self):
@@ -363,3 +351,37 @@
 
 class RoutersIpV6Test(RoutersTest):
     _ip_version = 6
+
+
+class DvrRoutersTest(base.BaseRouterTest):
+
+    @classmethod
+    def skip_checks(cls):
+        super(DvrRoutersTest, cls).skip_checks()
+        if not test.is_extension_enabled('dvr', 'network'):
+            msg = "DVR extension not enabled."
+            raise cls.skipException(msg)
+
+    @test.attr(type='smoke')
+    @test.idempotent_id('141297aa-3424-455d-aa8d-f2d95731e00a')
+    def test_create_distributed_router(self):
+        name = data_utils.rand_name('router')
+        create_body = self.admin_client.create_router(
+            name, distributed=True)
+        self.addCleanup(self._delete_router,
+                        create_body['router']['id'],
+                        self.admin_client)
+        self.assertTrue(create_body['router']['distributed'])
+
+    @test.attr(type='smoke')
+    @test.idempotent_id('644d7a4a-01a1-4b68-bb8d-0c0042cb1729')
+    def test_convert_centralized_router(self):
+        router = self._create_router(data_utils.rand_name('router'))
+        self.assertNotIn('distributed', router)
+        update_body = self.admin_client.update_router(router['id'],
+                                                      distributed=True)
+        self.assertTrue(update_body['router']['distributed'])
+        show_body = self.admin_client.show_router(router['id'])
+        self.assertTrue(show_body['router']['distributed'])
+        show_body = self.client.show_router(router['id'])
+        self.assertNotIn('distributed', show_body['router'])
diff --git a/tempest/api/network/test_routers_negative.py b/tempest/api/network/test_routers_negative.py
index ae17222..4149be3 100644
--- a/tempest/api/network/test_routers_negative.py
+++ b/tempest/api/network/test_routers_negative.py
@@ -114,3 +114,28 @@
 
 class RoutersNegativeIpV6Test(RoutersNegativeTest):
     _ip_version = 6
+
+
+class DvrRoutersNegativeTest(base.BaseRouterTest):
+
+    @classmethod
+    def skip_checks(cls):
+        super(DvrRoutersNegativeTest, cls).skip_checks()
+        if not test.is_extension_enabled('dvr', 'network'):
+            msg = "DVR extension not enabled."
+            raise cls.skipException(msg)
+
+    @classmethod
+    def resource_setup(cls):
+        super(DvrRoutersNegativeTest, cls).resource_setup()
+        cls.router = cls.create_router(data_utils.rand_name('router'))
+        cls.network = cls.create_network()
+        cls.subnet = cls.create_subnet(cls.network)
+
+    @test.attr(type=['negative', 'smoke'])
+    @test.idempotent_id('4990b055-8fc7-48ab-bba7-aa28beaad0b9')
+    def test_router_create_tenant_distributed_returns_forbidden(self):
+        self.assertRaises(lib_exc.Forbidden,
+                          self.create_router,
+                          data_utils.rand_name('router'),
+                          distributed=True)