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Add signal when a map theme changes, add tests
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| Original file line number | Diff line number | Diff line change |
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| # -*- coding: utf-8 -*- | ||
| """QGIS Unit tests for QgsMapThemeCollection. | ||
| .. note:: This program is free software; you can redistribute it and/or modify | ||
| it under the terms of the GNU General Public License as published by | ||
| the Free Software Foundation; either version 2 of the License, or | ||
| (at your option) any later version. | ||
| """ | ||
| __author__ = 'Nyall Dawson' | ||
| __date__ = '8/03/2017' | ||
| __copyright__ = 'Copyright 2017, The QGIS Project' | ||
| # This will get replaced with a git SHA1 when you do a git archive | ||
| __revision__ = '$Format:%H$' | ||
|
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| import qgis # NOQA | ||
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| from qgis.core import (QgsMapThemeCollection, | ||
| QgsProject, | ||
| QgsVectorLayer) | ||
| from qgis.testing import start_app, unittest | ||
| from qgis.PyQt.QtTest import QSignalSpy | ||
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| app = start_app() | ||
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| class TestQgsMapThemeCollection(unittest.TestCase): | ||
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| def setUp(self): | ||
| pass | ||
|
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| def testThemeChanged(self): | ||
| """ | ||
| Test that the mapTheme(s)Changed signals are correctly emitted in all relevant situations | ||
| """ | ||
| project = QgsProject() | ||
| collection = QgsMapThemeCollection(project) | ||
|
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| record = QgsMapThemeCollection.MapThemeRecord() | ||
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| theme_changed_spy = QSignalSpy(collection.mapThemeChanged) | ||
| themes_changed_spy = QSignalSpy(collection.mapThemesChanged) | ||
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| collection.insert('theme1', record) | ||
| self.assertEqual(len(theme_changed_spy), 1) | ||
| self.assertEqual(theme_changed_spy[-1][0], 'theme1') | ||
| self.assertEqual(len(themes_changed_spy), 1) | ||
|
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| # reinsert | ||
| collection.insert('theme1', record) | ||
| self.assertEqual(len(theme_changed_spy), 2) | ||
| self.assertEqual(theme_changed_spy[-1][0], 'theme1') | ||
| self.assertEqual(len(themes_changed_spy), 2) | ||
|
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| # update | ||
| collection.update('theme1', record) | ||
| self.assertEqual(len(theme_changed_spy), 3) | ||
| self.assertEqual(theme_changed_spy[-1][0], 'theme1') | ||
| self.assertEqual(len(themes_changed_spy), 3) | ||
|
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| # remove invalid | ||
| collection.removeMapTheme('i wish i was a slave to an age old trade... like riding around on rail cars and working long days') | ||
| self.assertEqual(len(theme_changed_spy), 3) | ||
| self.assertEqual(len(themes_changed_spy), 3) | ||
| # remove valid | ||
| collection.removeMapTheme('theme1') | ||
| self.assertEqual(len(theme_changed_spy), 3) # not changed - removed! | ||
| self.assertEqual(len(themes_changed_spy), 4) | ||
|
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| # reinsert | ||
| collection.insert('theme1', record) | ||
| self.assertEqual(len(theme_changed_spy), 4) | ||
| self.assertEqual(len(themes_changed_spy), 5) | ||
|
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| # clear | ||
| collection.clear() | ||
| self.assertEqual(len(theme_changed_spy), 4) # not changed - removed! | ||
| self.assertEqual(len(themes_changed_spy), 6) | ||
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| # check that mapThemeChanged is emitted if layer is removed | ||
| layer = QgsVectorLayer("Point?field=fldtxt:string", | ||
| "layer1", "memory") | ||
| layer2 = QgsVectorLayer("Point?field=fldtxt:string", | ||
| "layer2", "memory") | ||
| project.addMapLayers([layer, layer2]) | ||
|
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| # record for layer1 | ||
| record.addLayerRecord(QgsMapThemeCollection.MapThemeLayerRecord(layer)) | ||
| collection.insert('theme1', record) | ||
| self.assertEqual(len(theme_changed_spy), 5) | ||
| self.assertEqual(len(themes_changed_spy), 7) | ||
|
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| # now kill layer 2 | ||
| project.removeMapLayer(layer2) | ||
| self.assertEqual(len(theme_changed_spy), 5) # signal should not be emitted - layer is not in record | ||
| # now kill layer 1 | ||
| project.removeMapLayer(layer) | ||
| app.processEvents() | ||
| self.assertEqual(len(theme_changed_spy), 6) # signal should be emitted - layer is in record | ||
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| if __name__ == '__main__': | ||
| unittest.main() |