Rework healthcheck integration test

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

tests/helpers.py

@@ -2,6 +2,7 @@ import os
 import os.path
 import tarfile
 import tempfile
+import time
 
 import docker
 import pytest
@@ -47,3 +48,11 @@ def requires_api_version(version):
         ),
         reason="API version is too low (< {0})".format(version)
     )
+
+
+def wait_on_condition(condition, delay=0.1, timeout=40):
+    start_time = time.time()
+    while not condition():
+        if time.time() - start_time > timeout:
+            raise AssertionError("Timeout: %s" % condition)
+        time.sleep(delay)

tests/integration/healthcheck_test.py

-import time
 import docker
 
-from ..base import requires_api_version
+from .base import BaseIntegrationTest
+from .base import BUSYBOX
 from .. import helpers
 
+SECOND = 1000000000
 
-class HealthcheckTest(helpers.BaseTestCase):
 
-    @requires_api_version('1.21')
-    def test_healthcheck(self):
+class HealthcheckTest(BaseIntegrationTest):
+
+    @helpers.requires_api_version('1.24')
+    def test_healthcheck_passes(self):
         healthcheck = docker.types.Healthcheck(
-            test=["CMD-SHELL",
-                  "foo.txt || (/bin/usleep 10000 && touch foo.txt)"],
-            interval=500000,
-            timeout=1000000000,
-            retries=1
+            test=["CMD-SHELL", "true"],
+            interval=1*SECOND,
+            timeout=1*SECOND,
+            retries=1,
         )
-        container = self.client.create_container(helpers.BUSYBOX, 'cat',
-                                                 detach=True, stdin_open=True,
-                                                 healthcheck=healthcheck)
-        id = container['Id']
-        self.client.start(id)
-        self.tmp_containers.append(id)
-        res1 = self.client.inspect_container(id)
-        self.assertIn('State', res1)
-        self.assertIn('Health', res1['State'])
-        self.assertIn('Status', res1['State']['Health'])
-        self.assertEqual(res1['State']['Health']['Status'], "starting")
-        time.sleep(0.5)
-        res2 = self.client.inspect_container(id)
-        self.assertIn('State', res2)
-        self.assertIn('Health', res2['State'])
-        self.assertIn('Status', res2['State']['Health'])
-        self.assertEqual(res2['State']['Health']['Status'], "healthy")
+        container = self.client.create_container(
+            BUSYBOX, 'top', healthcheck=healthcheck)
+        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"
+
+        self.client.start(container)
+        helpers.wait_on_condition(condition)
+
+    @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)
+        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)