Reduce code duplication in TestUtilities

Author: RedFantom

tests/test_utilities.py

@@ -11,22 +11,29 @@
 
 
 class TestUtilities(BaseWidgetTest):
+    def assertIsChild(self, child, parent):
+        self.assertIn(child, parent.children.values())
+        parent_of_parent = parent.winfo_parent()
+        if not parent_of_parent.endswith("."):
+            parent_of_parent += "."
+        self.assertEquals(child.winfo_parent(), parent_of_parent + parent.winfo_name())
+    
     def _dummy_bind(self, event):
         pass
 
     def test_move_widget(self):
         label = ttk.Label(self.window)
         tl = tk.Toplevel(self.window)
         label = move_widget(label, tl)
-        self.assertTrue(label.winfo_parent() == tl.winfo_parent() + '.' + tl.winfo_name())
+        self.assertIsChild(label, tl)
 
     def test_move_widget_pack(self):
         label = ttk.Label(self.window)
         label.pack()
         tl = tk.Toplevel(self.window)
         label = move_widget(label, tl)
         label.pack()
-        self.assertTrue(label.winfo_parent() == tl.winfo_parent() + '.' + tl.winfo_name())
+        self.assertIsChild(label, tl)
         self.assertIn(label, tl.pack_slaves())
 
     def test_move_widget_grid(self):
@@ -35,7 +42,7 @@ def test_move_widget_grid(self):
         tl = tk.Toplevel(self.window)
         label = move_widget(label, tl)
         label.grid()
-        self.assertTrue(label.winfo_parent() == tl.winfo_parent() + '.' + tl.winfo_name())
+        self.assertIsChild(label, tl)
         self.assertIn(label, tl.grid_slaves())
 
     def test_move_widget_place(self):
@@ -44,7 +51,7 @@ def test_move_widget_place(self):
         tl = tk.Toplevel(self.window)
         label = move_widget(label, tl)
         label.place()
-        self.assertTrue(label.winfo_parent() == tl.winfo_parent() + '.' + tl.winfo_name())
+        self.assertIsChild(label, tl)
         self.assertIn(label, tl.place_slaves())
 
     def test_move_widget_with_binding(self):
@@ -54,7 +61,7 @@ def test_move_widget_with_binding(self):
         tl = tk.Toplevel(self.window)
         label = move_widget(label, tl)
         label.pack()
-        self.assertTrue(label.winfo_parent() == tl.winfo_parent() + '.' + tl.winfo_name())
+        self.assertIsChild(label, tl)
         self.assertIn('<Enter>', label.bind())
 
     def test_move_widget_with_binding_on_parent(self):