Add beginning of unit tests for QgsLayerTreeView

tests/src/python/CMakeLists.txt

@@ -71,6 +71,7 @@ ADD_PYTHON_TEST(PyQgsJsonUtils test_qgsjsonutils.py)
 ADD_PYTHON_TEST(PyQgsLayerMetadata test_qgslayermetadata.py)
 ADD_PYTHON_TEST(PyQgsLayerTreeMapCanvasBridge test_qgslayertreemapcanvasbridge.py)
 ADD_PYTHON_TEST(PyQgsLayerTree test_qgslayertree.py)
+ADD_PYTHON_TEST(PyQgsLayerTreeView test_qgslayertreeview.py)
 ADD_PYTHON_TEST(PyQgsLayout test_qgslayout.py)
 ADD_PYTHON_TEST(PyQgsLayoutAlign test_qgslayoutaligner.py)
 ADD_PYTHON_TEST(PyQgsLayoutAtlas test_qgslayoutatlas.py)

tests/src/python/test_qgslayertreeview.py

@@ -0,0 +1,95 @@
+# -*- coding: utf-8 -*-
+"""QGIS Unit tests for QgsLayerTreeView.
+
+.. 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__ = '02.04.2018'
+__copyright__ = 'Copyright 2018, The QGIS Project'
+# This will get replaced with a git SHA1 when you do a git archive
+__revision__ = '$Format:%H$'
+
+import qgis  # NOQA
+
+import os
+
+from qgis.core import (
+    QgsLayerTreeModel,
+    QgsProject,
+    QgsVectorLayer
+)
+from qgis.gui import (QgsLayerTreeView,
+                      QgsLayerTreeViewDefaultActions)
+from qgis.testing import start_app, unittest
+from utilities import (unitTestDataPath)
+from qgis.PyQt.QtCore import QStringListModel
+from qgis.PyQt.QtTest import QSignalSpy
+
+app = start_app()
+TEST_DATA_DIR = unitTestDataPath()
+
+
+class TestQgsLayerTreeView(unittest.TestCase):
+
+    def __init__(self, methodName):
+        """Run once on class initialization."""
+        unittest.TestCase.__init__(self, methodName)
+
+        # setup a dummy project
+        self.project = QgsProject()
+        self.layer = QgsVectorLayer("Point?field=fldtxt:string",
+                                    "layer1", "memory")
+        self.layer2 = QgsVectorLayer("Point?field=fldtxt:string",
+                                     "layer2", "memory")
+        self.layer3 = QgsVectorLayer("Point?field=fldtxt:string",
+                                     "layer3", "memory")
+        self.project.addMapLayers([self.layer, self.layer2, self.layer3])
+        self.model = QgsLayerTreeModel(self.project.layerTreeRoot())
+
+    def testSetModel(self):
+        view = QgsLayerTreeView()
+
+        # should not work
+        string_list_model = QStringListModel()
+        view.setModel(string_list_model)
+        self.assertFalse(view.model())
+
+        # should work
+        view.setModel(self.model)
+        self.assertEqual(view.model(), self.model)
+
+    def testSetCurrentLayer(self):
+        view = QgsLayerTreeView()
+        view.setModel(self.model)
+        current_layer_changed_spy = QSignalSpy(view.currentLayerChanged)
+        self.assertFalse(view.currentLayer())
+        view.setCurrentLayer(self.layer3)
+        self.assertEqual(view.currentLayer(), self.layer3)
+        self.assertEqual(len(current_layer_changed_spy), 1)
+        view.setCurrentLayer(self.layer)
+        self.assertEqual(view.currentLayer(), self.layer)
+        self.assertEqual(len(current_layer_changed_spy), 2)
+        view.setCurrentLayer(None)
+        self.assertFalse(view.currentLayer())
+        self.assertEqual(len(current_layer_changed_spy), 3)
+
+    def testDefaultActions(self):
+        view = QgsLayerTreeView()
+        view.setModel(self.model)
+        actions = QgsLayerTreeViewDefaultActions(view)
+
+        # show in overview action
+        view.setCurrentLayer(self.layer)
+        self.assertEqual(view.currentNode().customProperty('overview', 0), False)
+        show_in_overview = actions.actionShowInOverview()
+        show_in_overview.trigger()
+        self.assertEqual(view.currentNode().customProperty('overview', 0), True)
+        show_in_overview.trigger()
+        self.assertEqual(view.currentNode().customProperty('overview', 0), False)
+
+
+if __name__ == '__main__':
+    unittest.main()