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131 lines
5.0 KiB
Python
131 lines
5.0 KiB
Python
import sys
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import unittest
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from contextlib import contextmanager
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from django.test import LiveServerTestCase, tag
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from django.utils.decorators import classproperty
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from django.utils.module_loading import import_string
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from django.utils.text import capfirst
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class SeleniumTestCaseBase(type(LiveServerTestCase)):
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# List of browsers to dynamically create test classes for.
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browsers = []
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# A selenium hub URL to test against.
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selenium_hub = None
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# The external host Selenium Hub can reach.
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external_host = None
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# Sentinel value to differentiate browser-specific instances.
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browser = None
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# Run browsers in headless mode.
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headless = False
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def __new__(cls, name, bases, attrs):
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"""
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Dynamically create new classes and add them to the test module when
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multiple browsers specs are provided (e.g. --selenium=firefox,chrome).
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"""
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test_class = super().__new__(cls, name, bases, attrs)
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# If the test class is either browser-specific or a test base, return it.
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if test_class.browser or not any(name.startswith('test') and callable(value) for name, value in attrs.items()):
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return test_class
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elif test_class.browsers:
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# Reuse the created test class to make it browser-specific.
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# We can't rename it to include the browser name or create a
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# subclass like we do with the remaining browsers as it would
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# either duplicate tests or prevent pickling of its instances.
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first_browser = test_class.browsers[0]
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test_class.browser = first_browser
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# Listen on an external interface if using a selenium hub.
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host = test_class.host if not test_class.selenium_hub else '0.0.0.0'
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test_class.host = host
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test_class.external_host = cls.external_host
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# Create subclasses for each of the remaining browsers and expose
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# them through the test's module namespace.
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module = sys.modules[test_class.__module__]
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for browser in test_class.browsers[1:]:
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browser_test_class = cls.__new__(
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cls,
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"%s%s" % (capfirst(browser), name),
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(test_class,),
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{
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'browser': browser,
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'host': host,
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'external_host': cls.external_host,
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'__module__': test_class.__module__,
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}
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)
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setattr(module, browser_test_class.__name__, browser_test_class)
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return test_class
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# If no browsers were specified, skip this class (it'll still be discovered).
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return unittest.skip('No browsers specified.')(test_class)
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@classmethod
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def import_webdriver(cls, browser):
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return import_string("selenium.webdriver.%s.webdriver.WebDriver" % browser)
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@classmethod
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def import_options(cls, browser):
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return import_string('selenium.webdriver.%s.options.Options' % browser)
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@classmethod
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def get_capability(cls, browser):
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from selenium.webdriver.common.desired_capabilities import DesiredCapabilities
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return getattr(DesiredCapabilities, browser.upper())
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def create_options(self):
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options = self.import_options(self.browser)()
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if self.headless:
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try:
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options.headless = True
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except AttributeError:
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pass # Only Chrome and Firefox support the headless mode.
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return options
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def create_webdriver(self):
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if self.selenium_hub:
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from selenium import webdriver
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return webdriver.Remote(
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command_executor=self.selenium_hub,
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desired_capabilities=self.get_capability(self.browser),
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)
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return self.import_webdriver(self.browser)(options=self.create_options())
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@tag('selenium')
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class SeleniumTestCase(LiveServerTestCase, metaclass=SeleniumTestCaseBase):
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implicit_wait = 10
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external_host = None
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@classproperty
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def live_server_url(cls):
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return 'http://%s:%s' % (cls.external_host or cls.host, cls.server_thread.port)
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@classproperty
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def allowed_host(cls):
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return cls.external_host or cls.host
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@classmethod
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def setUpClass(cls):
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cls.selenium = cls.create_webdriver()
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cls.selenium.implicitly_wait(cls.implicit_wait)
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super().setUpClass()
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@classmethod
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def _tearDownClassInternal(cls):
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# quit() the WebDriver before attempting to terminate and join the
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# single-threaded LiveServerThread to avoid a dead lock if the browser
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# kept a connection alive.
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if hasattr(cls, 'selenium'):
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cls.selenium.quit()
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super()._tearDownClassInternal()
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@contextmanager
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def disable_implicit_wait(self):
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"""Disable the default implicit wait."""
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self.selenium.implicitly_wait(0)
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try:
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yield
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finally:
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self.selenium.implicitly_wait(self.implicit_wait)
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