Add ContainerSpec mounts test

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

tests/unit/dockertypes_test.py

@@ -8,8 +8,8 @@ import pytest
 from docker.constants import DEFAULT_DOCKER_API_VERSION
 from docker.errors import InvalidArgument, InvalidVersion
 from docker.types import (
-    ContainerConfig, EndpointConfig, HostConfig, IPAMConfig, IPAMPool,
+    ContainerConfig, ContainerSpec, EndpointConfig, HostConfig, IPAMConfig,
-    LogConfig, Mount, ServiceMode, Ulimit,
+    IPAMPool, LogConfig, Mount, ServiceMode, Ulimit,
 )
 
 try:
@@ -220,6 +220,22 @@ class ContainerConfigTest(unittest.TestCase):
         assert 'The volume_driver option has been moved' in str(w[0].message)
 
 
+class ContainerSpecTest(unittest.TestCase):
+    def test_parse_mounts(self):
+        spec = ContainerSpec(
+            image='scratch', mounts=[
+                '/local:/container',
+                '/local2:/container2:ro',
+                Mount(target='/target', source='/source')
+            ]
+        )
+
+        assert 'Mounts' in spec
+        assert len(spec['Mounts']) == 3
+        for mount in spec['Mounts']:
+            assert isinstance(mount, Mount)
+
+
 class UlimitTest(unittest.TestCase):
     def test_create_host_config_dict_ulimit(self):
         ulimit_dct = {'name': 'nofile', 'soft': 8096}