def test_managed_web_browser_on_windows_os(self):
popen_calls = self.exit_stack.enter_context(self.swap_popen())
self.exit_stack.enter_context(self.swap(common, 'OS_NAME', 'Windows'))
self.exit_stack.enter_context(
self.swap_to_always_return(os, 'listdir', value=[]))
managed_web_browser = servers.create_managed_web_browser(123)
self.assertIsNone(managed_web_browser)
self.assertEqual(len(popen_calls), 0)
def test_managed_web_browser_on_mac_os(self):
popen_calls = self.exit_stack.enter_context(self.swap_popen())
self.exit_stack.enter_context(self.swap(common, 'OS_NAME', 'Darwin'))
self.exit_stack.enter_context(
self.swap_to_always_return(os, 'listdir', value=[]))
managed_web_browser = servers.create_managed_web_browser(123)
self.assertIsNotNone(managed_web_browser)
self.exit_stack.enter_context(managed_web_browser)
self.assertEqual(len(popen_calls), 1)
self.assertEqual(popen_calls[0].program_args,
['open', 'http://localhost:123/'])
