Add a simple __main__ to easily show healthcheck output

Seems like not many people know what the detailed output
of this thing does, so in order to make it easier to see
that add a simple __main__ entrypoint.

Change-Id: Ife3b49c29df7d3558efebb4584971cf69bc8359d

1 files changed, 24 insertions, 0 deletions

diff --git a/oslo_middleware/tests/test_healthcheck.py b/oslo_middleware/tests/test_healthcheck.py
index 3ffb03f..19fc63a 100644
--- a/oslo_middleware/tests/test_healthcheck.py
+++ b/oslo_middleware/tests/test_healthcheck.py
@@ -13,12 +13,36 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+import threading
+import time
+
 import mock
 from oslotest import base as test_base
+import requests
 import webob.dec
 import webob.exc
 
 from oslo_middleware import healthcheck
+from oslo_middleware.healthcheck import __main__
+
+
+class HealthcheckMainTests(test_base.BaseTestCase):
+
+    def test_startup_response(self):
+        server = __main__.create_server(0)
+        th = threading.Thread(target=server.serve_forever)
+        th.start()
+        self.addCleanup(server.shutdown)
+        while True:
+            try:
+                r = requests.get("http://%s:%s" % (server.server_address[0],
+                                                   server.server_address[1]))
+            except requests.ConnectionError:
+                # Server hasn't started up yet, try again in a few.
+                time.sleep(1)
+            else:
+                self.assertEqual(200, r.status_code)
+                break
 
 
 class HealthcheckTests(test_base.BaseTestCase):