Improve error reporting

In case of errors, the selenuim testcase extracts the test
name, error message and source of the error from the qunit
page and logs them, so that it's easier to locate the issue.

Also added 'from __future__ import absolute_import' to avoid
issues with importing the selenium library from the script
named selenium.py

Change-Id: I040d147ad9c78fe48080b6a01ff1b4d89d6e9c3e

tuskar_ui/test/selenium.py

@@ -14,7 +14,12 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from __future__ import absolute_import
+
+import logging
+
 from horizon.test import helpers as test
+from selenium.common import exceptions as selenium_exceptions
 
 
 class BrowserTests(test.SeleniumTestCase):
@@ -28,5 +33,23 @@ class BrowserTests(test.SeleniumTestCase):
             return "Tests completed" in text
 
         wait.until(qunit_done)
-        failed = self.selenium.find_element_by_class_name("failed")
-        self.assertEqual(int(failed.text), 0)
+
+        failed_elem = self.selenium.find_element_by_class_name("failed")
+        failed = int(failed_elem.text)
+        if failed:
+            self.log_failure_messages()
+        self.assertEqual(failed, 0)
+
+    def log_failure_messages(self):
+        logger = logging.getLogger('selenium')
+        logger.error("Errors found during qunit test:")
+        fail_elems = self.selenium.find_elements_by_class_name("fail")
+        for elem in fail_elems:
+            try:
+                module = elem.find_element_by_class_name("module-name").text
+            except selenium_exceptions.NoSuchElementException:
+                continue
+            message = elem.find_element_by_class_name("test-message").text
+            source = elem.find_element_by_tag_name("pre").text
+            logger.error("Module: %s, message: %s, source: %s" % (
+                module, message, source))

tuskar_ui/test/settings.py

@@ -121,6 +121,11 @@ LOGGING['loggers']['openstack_dashboard'] = {
     'propagate': False,
 }
 
+LOGGING['loggers']['selenium'] = {
+    'handlers': ['test'],
+    'propagate': False,
+}
+
 SECURITY_GROUP_RULES = {
     'all_tcp': {
         'name': 'ALL TCP',