Handle untyped ContainerSpec dict in _check_api_features

Signed-off-by: Joffrey F <joffrey@docker.com>

docker/api/service.py

@@ -38,7 +38,7 @@ def _check_api_features(version, task_template, update_config):
                         'Placement.preferences is not supported in'
                         ' API version < 1.27'
                     )
-        if task_template.container_spec.get('TTY'):
+        if task_template.get('ContainerSpec', {}).get('TTY'):
             if utils.version_lt(version, '1.25'):
                 raise errors.InvalidVersion(
                     'ContainerSpec.TTY is not supported in API version < 1.25'

tests/integration/api_service_test.py

@@ -376,6 +376,23 @@ class ServiceTest(BaseAPIIntegrationTest):
         assert 'TTY' in con_spec
         assert con_spec['TTY'] is True
 
+    @requires_api_version('1.25')
+    def test_create_service_with_tty_dict(self):
+        container_spec = {
+            'Image': BUSYBOX,
+            'Command': ['true'],
+            'TTY': True
+        }
+        task_tmpl = docker.types.TaskTemplate(container_spec)
+        name = self.get_service_name()
+        svc_id = self.client.create_service(task_tmpl, name=name)
+        svc_info = self.client.inspect_service(svc_id)
+        assert 'TaskTemplate' in svc_info['Spec']
+        assert 'ContainerSpec' in svc_info['Spec']['TaskTemplate']
+        con_spec = svc_info['Spec']['TaskTemplate']['ContainerSpec']
+        assert 'TTY' in con_spec
+        assert con_spec['TTY'] is True
+
     def test_create_service_global_mode(self):
         container_spec = docker.types.ContainerSpec(
             BUSYBOX, ['echo', 'hello']