Merge the two webdrivers

Horizon currently has two webdrivers for selenium-based
testing; this patch merges them into one so all tests
(selenium functional tests and integration tests) benefit
from improvements we make to the webdriver.

Change-Id: Iac471c2c7e40c799711746ef9e3e4ef87aecf098

horizon/test/firefox_binary.py

@@ -0,0 +1,74 @@
+# Copyright 2015, Rackspace, US, Inc.
+#
+# 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 platform
+import shutil
+import subprocess
+
+from selenium.common import exceptions as selenium_exceptions
+from selenium.webdriver.common import desired_capabilities as dc
+from selenium.webdriver import firefox
+
+
+class FirefoxBinary(firefox.firefox_binary.FirefoxBinary):
+    """Workarounds selenium firefox issues.
+
+    There is race condition in the way firefox is spawned. The exact
+    cause hasn't been properly diagnosed yet but it's around:
+
+    - getting a free port from the OS with
+    selenium.webdriver.common.utils free_port(),
+
+    - release the port immediately but record it in ff prefs so that ff
+    can listen on that port for the internal http server.
+
+    It has been observed that this leads to hanging processes for
+    'firefox -silent'.
+    """
+
+    def _start_from_profile_path(self, path):
+        self._firefox_env["XRE_PROFILE_PATH"] = path
+
+        if platform.system().lower() == 'linux':
+            self._modify_link_library_path()
+        command = [self._start_cmd, "-silent"]
+        if self.command_line is not None:
+            for cli in self.command_line:
+                command.append(cli)
+
+# The following exists upstream and is known to create hanging
+# firefoxes, leading to zombies.
+#        subprocess.Popen(command, stdout=self._log_file,
+#              stderr=subprocess.STDOUT,
+#              env=self._firefox_env).communicate()
+        command[1] = '-foreground'
+        self.process = subprocess.Popen(
+            command, stdout=self._log_file, stderr=subprocess.STDOUT,
+            env=self._firefox_env)
+
+
+class WebDriver(firefox.webdriver.WebDriver):
+    """Workarounds selenium firefox issues."""
+    def __init__(self, firefox_profile=None, firefox_binary=None, timeout=30,
+                 desired_capabilities=dc.DesiredCapabilities.FIREFOX,
+                 proxy=None):
+        try:
+            super(WebDriver, self).__init__(
+                firefox_profile, FirefoxBinary(), timeout,
+                desired_capabilities, proxy)
+        except selenium_exceptions.WebDriverException:
+            # If we can't start, cleanup profile
+            shutil.rmtree(self.profile.path)
+            if self.profile.tempfolder is not None:
+                shutil.rmtree(self.profile.tempfolder)
+            raise

horizon/test/helpers.py

@@ -41,15 +41,17 @@ from django.contrib.staticfiles.testing \
 LOG = logging.getLogger(__name__)
 
 
+# NOTE: Several distributions can't ship Selenium, or the Firefox
+# component of it, due to its non-free license. So they have to patch
+# it out of test-requirements.txt Avoid import failure and force not
+# running selenium tests if we attempt to run selenium tests using the
+# Firefox driver and it is not available.
 try:
     from selenium.webdriver.support import ui as selenium_ui
     import xvfbwrapper  # Only needed when running the Selenium tests headless
 
     from horizon.test.webdriver import WebDriver  # noqa
 except ImportError as e:
-    # NOTE(saschpe): Several distribution can't ship selenium due to its
-    # non-free license. So they have to patch it out of test-requirements.txt
-    # Avoid import failure and force not running selenium tests.
     LOG.warning("{0}, force WITH_SELENIUM=False".format(str(e)))
     os.environ['WITH_SELENIUM'] = ''
 

horizon/test/webdriver.py

@@ -19,77 +19,165 @@
 
 import logging
 import os
-import platform
+import time
-import shutil
-import subprocess
 
 LOG = logging.getLogger(__name__)
 
+
+class ElementNotReloadableException(Exception):
+    """Raised when reload is not possible."""
+    pass
+
+
+from selenium.common import exceptions
+from selenium.webdriver.common import by
+from selenium.webdriver.common import desired_capabilities as dc
+from selenium.webdriver.remote import webelement
+
 # Select the WebDriver to use based on the --selenium-phantomjs switch.
-# NOTE: Several distributions can't ship Selenium, or the Firefox
+if os.environ.get('SELENIUM_PHANTOMJS'):
-# component of it, due to its non-free license. So they have to patch
+    from selenium.webdriver import PhantomJS as WebDriver
-# it out of test-requirements.txt Avoid import failure and force not
+    desired_capabilities = dc.DesiredCapabilities.PHANTOMJS
-# running selenium tests if we attempt to run selenium tests using the
+else:
-# Firefox driver and it is not available.
+    from horizon.test.firefox_binary import WebDriver
-try:
+    desired_capabilities = dc.DesiredCapabilities.FIREFOX
-    if os.environ.get('SELENIUM_PHANTOMJS'):
-        from selenium.webdriver import PhantomJS as WebDriver
-    else:
-        from selenium.common import exceptions as selenium_exceptions
-        from selenium.webdriver import firefox
 
-        class FirefoxBinary(firefox.firefox_binary.FirefoxBinary):
-            """Workarounds selenium firefox issues.
 
-            There is race condition in the way firefox is spawned. The exact
+class WrapperFindOverride(object):
-            cause hasn't been properly diagnosed yet but it's around:
+    """Mixin for overriding find_element methods."""
 
-            - getting a free port from the OS with
+    def find_element(self, by=by.By.ID, value=None):
-            selenium.webdriver.common.utils free_port(),
+        web_el = super(WrapperFindOverride, self).find_element(by, value)
+        return WebElementWrapper(web_el.parent, web_el.id, (by, value),
+                                 self)
 
-            - release the port immediately but record it in ff prefs so that ff
+    def find_elements(self, by=by.By.ID, value=None):
-            can listen on that port for the internal http server.
+        web_els = super(WrapperFindOverride, self).find_elements(by, value)
+        result = []
+        for index, web_el in enumerate(web_els):
+            result.append(WebElementWrapper(web_el.parent, web_el.id,
+                                            (by, value), self, index))
+        return result
 
-            It has been observed that this leads to hanging processes for
-            'firefox -silent'.
-            """
 
-            def _start_from_profile_path(self, path):
+class WebElementWrapper(WrapperFindOverride, webelement.WebElement):
-                self._firefox_env["XRE_PROFILE_PATH"] = path
+    """WebElement class wrapper.
 
-                if platform.system().lower() == 'linux':
+    WebElement wrapper that catches the StaleElementReferenceException and
-                    self._modify_link_library_path()
+    tries to reload the element by sending request to its source element
-                command = [self._start_cmd, "-silent"]
+    (element that created actual element) for reload, in case that source
-                if self.command_line is not None:
+    element needs to be reloaded as well, it asks its parent till web
-                    for cli in self.command_line:
+    driver is reached. In case driver was reached and did not manage to
-                        command.append(cli)
+    find the element it is probable that programmer made a mistake and
+    actualStaleElementReferenceException is raised.
+    """
 
-        # The following exists upstream and is known to create hanging
+    STALE_ELEMENT_REFERENCE_WAIT = 0.5
-        # firefoxes, leading to zombies.
+    STALE_ELEMENT_REFERENCE_MAX_TRY = 10
-        #        subprocess.Popen(command, stdout=self._log_file,
-        #              stderr=subprocess.STDOUT,
-        #              env=self._firefox_env).communicate()
-                command[1] = '-foreground'
-                self.process = subprocess.Popen(
-                    command, stdout=self._log_file, stderr=subprocess.STDOUT,
-                    env=self._firefox_env)
 
-        class WebDriver(firefox.webdriver.WebDriver):
+    def __init__(self, parent, id_, locator, src_element, index=None):
-            """Workarounds selenium firefox issues."""
+        super(WebElementWrapper, self).__init__(parent, id_)
+        self.locator = locator
+        self.src_element = src_element
 
-            def __init__(self, firefox_profile=None, firefox_binary=None,
+        # StaleElementReferenceException occurrence counter
-                         timeout=30, capabilities=None, proxy=None):
+        self.stale_reference_occurrence = 0
-                try:
+
-                    super(WebDriver, self).__init__(
+        # storing if web element reload succeed or not
-                        firefox_profile, FirefoxBinary(), timeout,
+        # in case of fail StaleElementReferenceException is raised
-                        capabilities, proxy)
+        self.reload_failed = False
-                except selenium_exceptions.WebDriverException:
+
-                    # If we can't start, cleanup profile
+        # in case element was looked up previously via find_elements
-                    shutil.rmtree(self.profile.path)
+        # we need his position in the returned list
-                    if self.profile.tempfolder is not None:
+        self.index = index
-                        shutil.rmtree(self.profile.tempfolder)
+
+        # if reloading of some other web element is in progress
+        # StaleElementReferenceException is not raised within current
+        # context
+        self.web_element_reload = False
+
+    def reload_request(self, locator, index=None):
+        self.web_element_reload = True
+        try:
+            # element was found out via find_elements
+            if index is not None:
+                web_els = self.src_element.find_elements(*locator)
+                web_el = web_els[index]
+            else:
+                web_el = self.src_element.find_element(*locator)
+        except (exceptions.NoSuchElementException, IndexError):
+            return False
+
+        self.web_element_reload = False
+        return web_el
+
+    def _reload_element(self):
+        """Method for starting reload process on current instance."""
+        web_el = self.src_element.reload_request(self.locator, self.index)
+        if not web_el:
+            return
+        self._parent = web_el.parent
+        self._id = web_el.id
+
+    def _execute(self, command, params=None):
+        """Overriding in order to catch StaleElementReferenceException."""
+        result = None
+        while True:
+            try:
+                result = super(WebElementWrapper, self)._execute(command,
+                                                                 params)
+                break
+            except exceptions.StaleElementReferenceException:
+
+                # in case we reach the limit
+                # STALE_ELEMENT_REFERENCE_MAX_TRY
+                # it is very probable that it is programmer fault
+                if self.reload_failed or self.stale_reference_occurrence \
+                        > self.STALE_ELEMENT_REFERENCE_MAX_TRY:
                     raise
 
-except ImportError as e:
+                # this is either programmer fault (bad logic in accessing
-    LOG.warning("{0}, force WITH_SELENIUM=False".format(str(e)))
+                # elements) or web page content is been loaded via ajax,
-    os.environ['WITH_SELENIUM'] = ''
+                # let's go with the second one and wait
+                # STALE_ELEMENT_REFERENCE_WAIT till the assumed page
+                # content is loaded and try to execute the whole process
+                # STALE_ELEMENT_REFERENCE_MAX_TRY times in case of failures
+                time.sleep(self.STALE_ELEMENT_REFERENCE_WAIT)
+
+                # try to reload the web element if result is false it
+                # means that request has gone to the driver and he did not
+                # find the element -> must be programmer fault, because it
+                # seems we are on entirely different page
+                try:
+                    self._reload_element()
+                except ElementNotReloadableException:
+
+                    # In case this element was responsible only for loading
+                    #  some other element raise the exception further
+                    if self.web_element_reload:
+                        raise
+                    else:
+                        self.reload_failed = True
+
+                # increment occurrences
+                self.stale_reference_occurrence += 1
+
+        # reset counter
+        self.stale_reference_occurrence = 0
+        return result
+
+
+class WebDriverWrapper(WrapperFindOverride, WebDriver):
+    """Wrapper for webdriver to return WebElementWrapper on find_element.
+    """
+    def reload_request(self, locator, index):
+        try:
+            # element was found out via find_elements
+            if index is not None:
+                web_els = self.find_elements(*locator)
+                web_el = web_els[index]
+            else:
+                web_el = self.find_element(*locator)
+            return web_el
+        except (exceptions.NoSuchElementException, IndexError):
+            raise ElementNotReloadableException()

openstack_dashboard/test/integration_tests/helpers.py

@@ -20,9 +20,9 @@ import uuid
 import testtools
 import xvfbwrapper
 
+from horizon.test import webdriver
 from openstack_dashboard.test.integration_tests import config
 from openstack_dashboard.test.integration_tests.pages import loginpage
-from openstack_dashboard.test.integration_tests import webdriver
 
 ROOT_PATH = os.path.dirname(os.path.abspath(config.__file__))
 
@@ -67,8 +67,11 @@ class BaseTestCase(testtools.TestCase):
             # and the webdriver.
             socket.setdefaulttimeout(60)
             # Start the Selenium webdriver and setup configuration.
+            desired_capabilities = dict(webdriver.desired_capabilities)
+            desired_capabilities['loggingPrefs'] = {'browser': 'ALL'}
             self.driver = webdriver.WebDriverWrapper(
-                logging_prefs={'browser': 'ALL'})
+                desired_capabilities=desired_capabilities
+            )
             self.driver.maximize_window()
             self.driver.implicitly_wait(self.CONFIG.selenium.implicit_wait)
             self.driver.set_page_load_timeout(

openstack_dashboard/test/integration_tests/webdriver.py

@@ -1,177 +0,0 @@
-#    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 os
-import time
-
-from selenium.common import exceptions
-from selenium import webdriver
-from selenium.webdriver.common import by
-from selenium.webdriver.common import desired_capabilities as dc
-from selenium.webdriver.remote import webelement
-
-
-class ElementNotReloadableException(Exception):
-    """Raised when reload is not possible."""
-    pass
-
-
-class WrapperFindOverride(object):
-    """Mixin for overriding find_element methods."""
-
-    def find_element(self, by=by.By.ID, value=None):
-        web_el = super(WrapperFindOverride, self).find_element(by, value)
-        return WebElementWrapper(web_el.parent, web_el.id, (by, value), self)
-
-    def find_elements(self, by=by.By.ID, value=None):
-        web_els = super(WrapperFindOverride, self).find_elements(by, value)
-        result = []
-        for index, web_el in enumerate(web_els):
-            result.append(WebElementWrapper(web_el.parent, web_el.id,
-                                            (by, value), self, index))
-        return result
-
-
-class WebElementWrapper(WrapperFindOverride, webelement.WebElement):
-    """WebElement class wrapper.
-
-    WebElement wrapper that catches the StaleElementReferenceException and
-    tries to reload the element by sending request to its source element
-    (element that created actual element) for reload, in case that source
-    element needs to be reloaded as well, it asks its parent till web driver
-    is reached. In case driver was reached and did not manage to find the
-    element it is probable that programmer made a mistake and actual
-    StaleElementReferenceException is raised.
-    """
-
-    STALE_ELEMENT_REFERENCE_WAIT = 0.5
-    STALE_ELEMENT_REFERENCE_MAX_TRY = 10
-
-    def __init__(self, parent, id_, locator, src_element, index=None):
-        super(WebElementWrapper, self).__init__(parent, id_)
-        self.locator = locator
-        self.src_element = src_element
-
-        # StaleElementReferenceException occurrence counter
-        self.stale_reference_occurrence = 0
-
-        # storing if web element reload succeed or not
-        # in case of fail StaleElementReferenceException is raised
-        self.reload_failed = False
-
-        # in case element was looked up previously via find_elements
-        # we need his position in the returned list
-        self.index = index
-
-        # if reloading of some other web element is in progress
-        # StaleElementReferenceException is not raised within current context
-        self.web_element_reload = False
-
-    def reload_request(self, locator, index=None):
-        self.web_element_reload = True
-        try:
-            # element was found out via find_elements
-            if index is not None:
-                web_els = self.src_element.find_elements(*locator)
-                web_el = web_els[index]
-            else:
-                web_el = self.src_element.find_element(*locator)
-        except (exceptions.NoSuchElementException, IndexError):
-            return False
-
-        self.web_element_reload = False
-        return web_el
-
-    def _reload_element(self):
-        """Method for starting reload process on current instance."""
-        web_el = self.src_element.reload_request(self.locator, self.index)
-        if not web_el:
-            return
-        self._parent = web_el.parent
-        self._id = web_el.id
-
-    def _execute(self, command, params=None):
-        """Overriding in order to catch StaleElementReferenceException."""
-        result = None
-        while True:
-            try:
-                result = super(WebElementWrapper, self)._execute(command,
-                                                                 params)
-                break
-            except exceptions.StaleElementReferenceException:
-
-                # in case we reach the limit STALE_ELEMENT_REFERENCE_MAX_TRY
-                # it is very probable that it is programmer fault
-                if self.reload_failed or self.stale_reference_occurrence \
-                        > self.STALE_ELEMENT_REFERENCE_MAX_TRY:
-                    raise
-
-                # this is either programmer fault
-                # (bad logic in accessing elements)
-                # or web page content is been loaded via ajax, let's go with
-                # the second one and wait STALE_ELEMENT_REFERENCE_WAIT till
-                # the assumed page content is loaded and try
-                # to execute the whole process
-                # STALE_ELEMENT_REFERENCE_MAX_TRY times in case of failures
-                time.sleep(self.STALE_ELEMENT_REFERENCE_WAIT)
-
-                # try to reload the web element
-                # if result is false it means that request has gone to the
-                # driver and he did not find the element -> must be programmer
-                # fault, because it seems we are on entirely different page
-                try:
-                    self._reload_element()
-                except ElementNotReloadableException:
-
-                    # In case this element was responsible only for loading
-                    #  some other element raise the exception further
-                    if self.web_element_reload:
-                        raise
-                    else:
-                        self.reload_failed = True
-
-                # increment occurrences
-                self.stale_reference_occurrence += 1
-
-        # reset counter
-        self.stale_reference_occurrence = 0
-        return result
-
-
-# select the active webdriver based on whether we --selenium-phantomjs or not
-if os.environ.get('SELENIUM_PHANTOMJS'):
-    WebDriver = webdriver.PhantomJS
-else:
-    WebDriver = webdriver.Firefox
-
-
-class WebDriverWrapper(WrapperFindOverride, WebDriver):
-    """Wrapper for webdriver to return WebElementWrapper on find_element."""
-    def __init__(self, logging_prefs=None, capabilities=None, **kwargs):
-        if capabilities is None:
-            capabilities = dc.DesiredCapabilities.FIREFOX
-        if logging_prefs is None:
-            logging_prefs = {'browser': 'ALL'}
-        capabilities['loggingPrefs'] = logging_prefs
-        super(WebDriverWrapper, self).__init__(capabilities=capabilities,
-                                               **kwargs)
-
-    def reload_request(self, locator, index):
-        try:
-            # element was found out via find_elements
-            if index is not None:
-                web_els = self.find_elements(*locator)
-                web_el = web_els[index]
-            else:
-                web_el = self.find_element(*locator)
-            return web_el
-        except (exceptions.NoSuchElementException, IndexError):
-            raise ElementNotReloadableException()

run_tests.sh

@@ -420,6 +420,10 @@ function run_integration_tests {
     export SELENIUM_HEADLESS=1
   fi
 
+  if [ $selenium_phantomjs -eq 1 ]; then
+    export SELENIUM_PHANTOMJS=1
+  fi
+
   echo "Running Horizon integration tests..."
   if [ -z "$testargs" ]; then
       ${command_wrapper} nosetests openstack_dashboard/test/integration_tests/tests