Add delete mappings unit test case

1. What is the problem
Tricircle does not have delete mappings unit test case

2. What is the solution to the problem
Implement related test case

3. What the features need to be implemented to the Tricircle
No new features

Change-Id: I597a25e4dbf0794a5dde4968db502672a28f4563

tricircle/tests/unit/db/test_api.py

@@ -43,17 +43,17 @@ class APITest(unittest.TestCase):
         route1 = {
             'top_id': 'top_uuid',
             'pod_id': 'test_pod_uuid_0',
-            'resource_type': 'port'}
+            'resource_type': 'network'}
         route2 = {
             'top_id': 'top_uuid',
             'pod_id': 'test_pod_uuid_1',
-            'bottom_id': 'bottom_uuid_1',
-            'resource_type': 'port'}
+            'bottom_id': 'top_uuid',
+            'resource_type': 'network'}
         route3 = {
-            'top_id': 'top_uuid',
+            'top_id': 'top_uuid2',
             'pod_id': 'test_pod_uuid_2',
             'bottom_id': 'bottom_uuid_2',
-            'resource_type': 'neutron'}
+            'resource_type': 'port'}
 
         routes = [route1, route2, route3]
         with self.context.session.begin():
@@ -68,25 +68,23 @@ class APITest(unittest.TestCase):
         self._create_resource_mappings()
         region_name = 'test_pod_0'
         bottom_id = api.get_bottom_id_by_top_id_region_name(
-            self.context, 'top_uuid', region_name, 'port')
+            self.context, 'top_uuid', region_name, 'network')
         self.assertIsNone(bottom_id)
 
         region_name = 'test_pod_1'
         bottom_id = api.get_bottom_id_by_top_id_region_name(
-            self.context, 'top_uuid', region_name, 'port')
-        self.assertEqual(bottom_id, 'bottom_uuid_1')
+            self.context, 'top_uuid', region_name, 'network')
+        self.assertEqual(bottom_id, 'top_uuid')
 
     def test_get_bottom_mappings_by_top_id(self):
-        for i in xrange(3):
-            pod = {'pod_id': 'test_pod_uuid_%d' % i,
-                   'region_name': 'test_pod_%d' % i,
-                   'az_name': 'test_az_uuid_%d' % i}
-            api.create_pod(self.context, pod)
+        self._create_pod(0, 'test_az_uuid_0')
+        self._create_pod(1, 'test_az_uuid_1')
+        self._create_pod(2, 'test_az_uuid_2')
         self._create_resource_mappings()
         mappings = api.get_bottom_mappings_by_top_id(self.context,
-                                                     'top_uuid', 'port')
+                                                     'top_uuid', 'network')
         self.assertEqual('test_pod_uuid_1', mappings[0][0]['pod_id'])
-        self.assertEqual('bottom_uuid_1', mappings[0][1])
+        self.assertEqual('top_uuid', mappings[0][1])
 
     def test_get_bottom_mappings_by_tenant_pod(self):
         for i in xrange(3):
@@ -258,5 +256,31 @@ class APITest(unittest.TestCase):
         pod = api.get_pod_by_name(self.context, region_name)
         self.assertEqual(pod['region_name'], region_name)
 
+    def test_delete_mappings_by_bottom_id(self):
+        self._create_pod(0, 'test_az_uuid_0')
+        self._create_pod(1, 'test_az_uuid_1')
+        self._create_pod(2, 'test_az_uuid_2')
+        self._create_resource_mappings()
+        bottom_id = 'bottom_uuid_1'
+        api.delete_mappings_by_bottom_id(self.context, bottom_id)
+
+        filters = [{'key': 'bottom_id', 'comparator': 'eq',
+                    'value': bottom_id}]
+        routing = core.query_resource(
+            self.context, models.ResourceRouting, filters, [])
+        self.assertEqual(len(routing), 0)
+
+    def test_delete_mappings_by_top_id(self):
+        self._create_pod(0, 'test_az_uuid_0')
+        self._create_pod(1, 'test_az_uuid_1')
+        self._create_pod(2, 'test_az_uuid_2')
+        self._create_resource_mappings()
+        top_id = 'top_uuid'
+        api.delete_mappings_by_top_id(self.context, top_id)
+
+        mappings = api.get_bottom_mappings_by_top_id(
+            self.context, top_id, 'network')
+        self.assertEqual(len(mappings), 0)
+
     def tearDown(self):
         core.ModelBase.metadata.drop_all(core.get_engine())