Convert dicts to Healthcheck objects, string commands to CMD-SHELL lists

Signed-off-by: Aanand Prasad <aanand.prasad@gmail.com>

docker/types/healthcheck.py

 from .base import DictType
 
+import six
+
 
 class Healthcheck(DictType):
     def __init__(self, **kwargs):
         test = kwargs.get('test', kwargs.get('Test'))
+        if isinstance(test, six.string_types):
+            test = ["CMD-SHELL", test]
+
         interval = kwargs.get('interval', kwargs.get('Interval'))
         timeout = kwargs.get('timeout', kwargs.get('Timeout'))
         retries = kwargs.get('retries', kwargs.get('Retries'))
+
         super(Healthcheck, self).__init__({
             'Test': test,
             'Interval': interval,

docker/utils/utils.py

@@ -18,7 +18,7 @@ import six
 from .. import constants
 from .. import errors
 from .. import tls
-from ..types import Ulimit, LogConfig
+from ..types import Ulimit, LogConfig, Healthcheck
 
 if six.PY2:
     from urllib import splitnport
@@ -1119,6 +1119,9 @@ def create_container_config(
         # Force None, an empty list or dict causes client.start to fail
         volumes_from = None
 
+    if healthcheck and isinstance(healthcheck, dict):
+        healthcheck = Healthcheck(**healthcheck)
+
     attach_stdin = False
     attach_stdout = False
     attach_stderr = False

tests/integration/healthcheck_test.py

-import docker
-
 from .base import BaseIntegrationTest
 from .base import BUSYBOX
 from .. import helpers
@@ -7,50 +5,47 @@ from .. import helpers
 SECOND = 1000000000
 
 
+def wait_on_health_status(client, container, status):
+    def condition():
+        res = client.inspect_container(container)
+        return res['State']['Health']['Status'] == status
+    return helpers.wait_on_condition(condition)
+
+
 class HealthcheckTest(BaseIntegrationTest):
 
     @helpers.requires_api_version('1.24')
-    def test_healthcheck_passes(self):
-        healthcheck = docker.types.Healthcheck(
-            test=["CMD-SHELL", "true"],
-            interval=1*SECOND,
-            timeout=1*SECOND,
-            retries=1,
-        )
+    def test_healthcheck_shell_command(self):
         container = self.client.create_container(
-            BUSYBOX, 'top', healthcheck=healthcheck)
+            BUSYBOX, 'top', healthcheck=dict(test='echo "hello world"'))
         self.tmp_containers.append(container)
 
         res = self.client.inspect_container(container)
-        assert res['Config']['Healthcheck'] == {
-            "Test": ["CMD-SHELL", "true"],
-            "Interval": 1*SECOND,
-            "Timeout": 1*SECOND,
-            "Retries": 1,
-        }
-
-        def condition():
-            res = self.client.inspect_container(container)
-            return res['State']['Health']['Status'] == "healthy"
+        assert res['Config']['Healthcheck']['Test'] == \
+            ['CMD-SHELL', 'echo "hello world"']
 
+    @helpers.requires_api_version('1.24')
+    def test_healthcheck_passes(self):
+        container = self.client.create_container(
+            BUSYBOX, 'top', healthcheck=dict(
+                test="true",
+                interval=1*SECOND,
+                timeout=1*SECOND,
+                retries=1,
+            ))
+        self.tmp_containers.append(container)
         self.client.start(container)
-        helpers.wait_on_condition(condition)
+        wait_on_health_status(self.client, container, "healthy")
 
     @helpers.requires_api_version('1.24')
     def test_healthcheck_fails(self):
-        healthcheck = docker.types.Healthcheck(
-            test=["CMD-SHELL", "false"],
-            interval=1*SECOND,
-            timeout=1*SECOND,
-            retries=1,
-        )
         container = self.client.create_container(
-            BUSYBOX, 'top', healthcheck=healthcheck)
+            BUSYBOX, 'top', healthcheck=dict(
+                test="false",
+                interval=1*SECOND,
+                timeout=1*SECOND,
+                retries=1,
+            ))
         self.tmp_containers.append(container)
-
-        def condition():
-            res = self.client.inspect_container(container)
-            return res['State']['Health']['Status'] == "unhealthy"
-
         self.client.start(container)
-        helpers.wait_on_condition(condition)
+        wait_on_health_status(self.client, container, "unhealthy")