openlp/tests/functional/openlp_core/ui/test_themeform.py

# -*- coding: utf-8 -*-

##########################################################################
# OpenLP - Open Source Lyrics Projection                                 #
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# Copyright (c) 2008-2019 OpenLP Developers                              #
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# it under the terms of the GNU General Public License as published by   #
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"""
Package to test the openlp.core.ui.themeform package.
"""
from pathlib import Path
from unittest import TestCase
from unittest.mock import MagicMock, patch

from openlp.core.ui.themeform import ThemeForm


class TestThemeForm(TestCase):
    """
    Test the functions in the ThemeForm Class
    """
    def setUp(self):
        with patch('openlp.core.ui.themeform.ThemeForm._setup'):
            self.instance = ThemeForm(None)

    def test_on_image_path_edit_path_changed(self):
        """
        Test the `image_path_edit.pathChanged` handler
        """
        # GIVEN: An instance of Theme Form
        with patch.object(self.instance, 'set_background_page_values') as mocked_set_background_page_values:
            self.instance.theme = MagicMock()

            # WHEN: `on_image_path_edit_path_changed` is clicked
            self.instance.on_image_path_edit_path_changed(Path('/', 'new', 'pat.h'))

            # THEN: The theme background file should be set and `set_background_page_values` should have been called
            assert self.instance.theme.background_filename == Path('/', 'new', 'pat.h')
            mocked_set_background_page_values.assert_called_once_with()