Merge "Add test_create_router_set_gateway_with_fixed_ip"
diff --git a/tempest/api/network/test_routers.py b/tempest/api/network/test_routers.py
index fbfcafc..742fe59 100644
--- a/tempest/api/network/test_routers.py
+++ b/tempest/api/network/test_routers.py
@@ -239,6 +239,36 @@
              'enable_snat': False})
         self._verify_gateway_port(router['id'])
 
+    @decorators.idempotent_id('cbe42f84-04c2-11e7-8adb-fa163e4fa634')
+    @test.requires_ext(extension='ext-gw-mode', service='network')
+    @testtools.skipUnless(CONF.network.public_network_id,
+                          'The public_network_id option must be specified.')
+    def test_create_router_set_gateway_with_fixed_ip(self):
+        # Don't know public_network_address, so at first create address
+        # from public_network and delete
+        port = self.admin_ports_client.create_port(
+            network_id=CONF.network.public_network_id)['port']
+        self.admin_ports_client.delete_port(port_id=port['id'])
+
+        fixed_ip = {
+            'subnet_id': port['fixed_ips'][0]['subnet_id'],
+            'ip_address': port['fixed_ips'][0]['ip_address']
+        }
+        external_gateway_info = {
+            'network_id': CONF.network.public_network_id,
+            'external_fixed_ips': [fixed_ip]
+        }
+
+        # Create a router and set gateway to fixed_ip
+        router = self.admin_routers_client.create_router(
+            external_gateway_info=external_gateway_info)['router']
+        self.addCleanup(self.admin_routers_client.delete_router,
+                        router_id=router['id'])
+        # Examine router's gateway is equal to fixed_ip
+        self.assertEqual(router['external_gateway_info'][
+                         'external_fixed_ips'][0]['ip_address'],
+                         fixed_ip['ip_address'])
+
     @decorators.idempotent_id('ad81b7ee-4f81-407b-a19c-17e623f763e8')
     @testtools.skipUnless(CONF.network.public_network_id,
                           'The public_network_id option must be specified.')