def css_changed_test(self):
"""
Test that when the CSS changes, the plugins are looped over and given an opportunity to update the CSS
"""
# GIVEN: A mocked list of plugins, a mocked display and a MainDisplay
mocked_songs_plugin = MagicMock()
mocked_bibles_plugin = MagicMock()
mocked_plugin_manager = MagicMock()
mocked_plugin_manager.plugins = [mocked_songs_plugin, mocked_bibles_plugin]
Registry().register('plugin_manager', mocked_plugin_manager)
display = MagicMock()
main_display = MainDisplay(display)
# This is set up dynamically, so we need to mock it out for now
main_display.frame = MagicMock()
# WHEN: The css_changed() method is triggered
main_display.css_changed()
# THEN: The plugins should have each been given an opportunity to add their bit to the CSS
mocked_songs_plugin.refresh_css.assert_called_with(main_display.frame)
mocked_bibles_plugin.refresh_css.assert_called_with(main_display.frame)
