heat tests : Add verify_wordpress helper function

Functional tests : Add a new VerifyStack class and retry decorator,
which allows easy implementation of tests for stack successful creation.

Initial simple verify_wordpress function scrapes a wordpress homepage
and looks for a known string in the html result.

Change-Id: I32bd4bea04228c4f393894c65d040d55c65ddbca
Signed-off-by: Steven Hardy <shardy@redhat.com>

diff --git a/heat/tests/functional/verify.py b/heat/tests/functional/verify.py
new file mode 100644 (file)
index 0000000..f44b228
--- /dev/null
+++ b/heat/tests/functional/verify.py
@@ -0,0 +1,77 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+
+import urllib2
+import re
+import time
+
+# Default retry timeout (seconds) and sleep-time
+VERIFY_TIMEOUT = 300
+SLEEP_INTERVAL = 10
+
+
+class VerifyRetry(object):
+    def __init__(self, timeout=VERIFY_TIMEOUT, interval=SLEEP_INTERVAL):
+        """
+        Decorator to wrap verify operations to retry until timeout
+        """
+        self.timeout = timeout
+        self.interval = interval
+
+    def __call__(self, f):
+        def fn(*args, **kwargs):
+            elapsed = 0
+            result = False
+            while elapsed < self.timeout and not result:
+                result = f(*args, **kwargs)
+                if not result:
+                    print "Failed verify, sleeping for %ss (%s/%s)" %\
+                        (self.interval, elapsed, self.timeout)
+                    time.sleep(self.interval)
+                    elapsed += self.interval
+
+            return result
+
+        return fn
+
+
+class VerifyStack:
+    '''
+    Class containing helper-functions to prove a stack resource or service
+    has been created correctly, e.g by accessing the service and checking
+    the result is as expected
+    '''
+
+    @VerifyRetry()
+    def verify_wordpress(self, url, timeout=VERIFY_TIMEOUT):
+        '''
+        Verify the url provided has a functional wordpress installation
+        for now we simply scrape the page and do a regex for an expected
+        string
+        '''
+        WORDPRESS_REGEX = "<p>Welcome to the famous five minute WordPress"
+
+        print "Reading html from %s" % url
+        try:
+            content = urllib2.urlopen(url).read()
+        except:
+            return False
+
+        matches = re.findall(WORDPRESS_REGEX, content)
+        if len(matches):
+            print "VERIFY WORDPRESS : looks OK!"
+            return True
+        else:
+            return False