Add tests for heat template apis

This patch covers 4 template api calls -
1. Get stack template
2. List template versions
3. List resource types
4. Show resource schema

Change-Id: I85b16b8893264d1313e2e184011dd0ddfdaa4349

heat_integrationtests/functional/test_templates.py

@@ -0,0 +1,72 @@
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+
+from heat_integrationtests.functional import functional_base
+
+
+class TemplateAPITest(functional_base.FunctionalTestsBase):
+    """This will test the following template calls:
+
+    1. Get the template content for the specific stack
+    2. List template versions
+    3. List resource types
+    4. Show resource details for OS::Heat::TestResource
+    """
+
+    template = {
+        'heat_template_version': '2014-10-16',
+        'description': 'Test Template APIs',
+        'resources': {
+            'test1': {
+                'type': 'OS::Heat::TestResource',
+                'properties': {
+                    'update_replace': False,
+                    'wait_secs': 0,
+                    'value': 'Test1',
+                    'fail': False,
+                }
+            }
+        }
+    }
+
+    def setUp(self):
+        super(TemplateAPITest, self).setUp()
+
+    def test_get_stack_template(self):
+        stack_identifier = self.stack_create(
+            template=self.template
+        )
+        template_from_client = self.client.stacks.template(stack_identifier)
+        self.assertDictEqual(self.template, template_from_client)
+
+    def test_template_version(self):
+        template_versions = self.client.template_versions.list()
+        supported_template_versions = ["2013-05-23", "2014-10-16",
+                                       "2015-04-30", "2015-10-15",
+                                       "2012-12-12", "2010-09-09",
+                                       "2016-04-08"]
+        for template in template_versions:
+            self.assertIn(template.version.split(".")[1],
+                          supported_template_versions)
+
+    def test_resource_types(self):
+        resource_types = self.client.resource_types.list()
+        self.assertTrue(any(resource.resource_type == "OS::Heat::TestResource"
+                            for resource in resource_types))
+
+    def test_show_resource_template(self):
+        resource_details = self.client.resource_types.get(
+            resource_type="OS::Heat::TestResource"
+        )
+        self.assertEqual("OS::Heat::TestResource",
+                         resource_details['resource_type'])