106 lines
3.0 KiB
Python
106 lines
3.0 KiB
Python
"""
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Browser set up for acceptance tests.
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"""
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#pylint: disable=E1101
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#pylint: disable=W0613
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#pylint: disable=W0611
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from lettuce import before, after, world
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from splinter.browser import Browser
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from logging import getLogger
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from django.core.management import call_command
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from django.conf import settings
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from selenium.common.exceptions import WebDriverException
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# Let the LMS and CMS do their one-time setup
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# For example, setting up mongo caches
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from lms import one_time_startup
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from cms import one_time_startup
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# There is an import issue when using django-staticfiles with lettuce
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# Lettuce assumes that we are using django.contrib.staticfiles,
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# but the rest of the app assumes we are using django-staticfiles
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# (in particular, django-pipeline and our mako implementation)
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# To resolve this, we check whether staticfiles is installed,
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# then redirect imports for django.contrib.staticfiles
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# to use staticfiles.
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try:
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import staticfiles
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except ImportError:
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pass
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else:
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import sys
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sys.modules['django.contrib.staticfiles'] = staticfiles
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LOGGER = getLogger(__name__)
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LOGGER.info("Loading the lettuce acceptance testing terrain file...")
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MAX_VALID_BROWSER_ATTEMPTS = 20
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@before.harvest
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def initial_setup(server):
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"""
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Launch the browser once before executing the tests.
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"""
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browser_driver = getattr(settings, 'LETTUCE_BROWSER', 'chrome')
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# There is an issue with ChromeDriver2 r195627 on Ubuntu
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# in which we sometimes get an invalid browser session.
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# This is a work-around to ensure that we get a valid session.
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success = False
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num_attempts = 0
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while (not success) and num_attempts < MAX_VALID_BROWSER_ATTEMPTS:
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# Get a browser session
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world.browser = Browser(browser_driver)
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# Try to visit the main page
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# If the browser session is invalid, this will
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# raise a WebDriverException
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try:
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world.visit('/')
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except WebDriverException:
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world.browser.quit()
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num_attempts += 1
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else:
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success = True
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# If we were unable to get a valid session within the limit of attempts,
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# then we cannot run the tests.
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if not success:
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raise IOError("Could not acquire valid ChromeDriver browser session.")
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# Set the browser size to 1280x1024
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world.browser.driver.set_window_size(1280, 1024)
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@before.each_scenario
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def reset_data(scenario):
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"""
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Clean out the django test database defined in the
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envs/acceptance.py file: mitx_all/db/test_mitx.db
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"""
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LOGGER.debug("Flushing the test database...")
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call_command('flush', interactive=False)
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# Uncomment below to trigger a screenshot on error
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# @after.each_scenario
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def screenshot_on_error(scenario):
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"""
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Save a screenshot to help with debugging.
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"""
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if scenario.failed:
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world.browser.driver.save_screenshot('/tmp/last_failed_scenario.png')
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@after.all
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def teardown_browser(total):
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"""
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Quit the browser after executing the tests.
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"""
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world.browser.quit()
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