Issue #19602: Use specific asserts in tkinter tests.

Lib/tkinter/test/test_ttk/test_extensions.py

@@ -45,7 +45,7 @@ class LabeledScaleTest(unittest.TestCase):
         # it tries calling instance attributes not yet defined.
         ttk.LabeledScale(variable=myvar)
         if hasattr(sys, 'last_type'):
-            self.assertFalse(sys.last_type == tkinter.TclError)
+            self.assertNotEqual(sys.last_type, tkinter.TclError)
 
 
     def test_initialization(self):
@@ -120,14 +120,14 @@ class LabeledScaleTest(unittest.TestCase):
         # at the same time this shouldn't affect test outcome
         lscale.update()
         curr_xcoord = lscale.scale.coords()[0]
-        self.assertTrue(prev_xcoord != curr_xcoord)
+        self.assertNotEqual(prev_xcoord, curr_xcoord)
         # the label widget should have been repositioned too
         linfo_2 = lscale.label.place_info()
         self.assertEqual(lscale.label['text'], 0)
         self.assertEqual(curr_xcoord, int(linfo_2['x']))
         # change the range back
         lscale.scale.configure(from_=0, to=10)
-        self.assertTrue(prev_xcoord != curr_xcoord)
+        self.assertNotEqual(prev_xcoord, curr_xcoord)
         self.assertEqual(prev_xcoord, int(linfo_1['x']))
 
         lscale.destroy()
@@ -146,7 +146,7 @@ class LabeledScaleTest(unittest.TestCase):
         # at the same time this shouldn't affect test outcome
         x.update()
         self.assertEqual(x.label['text'], newval)
-        self.assertTrue(x.scale.coords()[0] > curr_xcoord)
+        self.assertGreater(x.scale.coords()[0], curr_xcoord)
         self.assertEqual(x.scale.coords()[0],
             int(x.label.place_info()['x']))
 
@@ -238,7 +238,7 @@ class OptionMenuTest(unittest.TestCase):
             if last == curr:
                 # no more menu entries
                 break
-            self.assertFalse(curr == default)
+            self.assertNotEqual(curr, default)
             i += 1
         self.assertEqual(i, len(items))
 

Lib/tkinter/test/test_ttk/test_style.py

@@ -18,7 +18,7 @@ class StyleTest(unittest.TestCase):
         style.configure('TButton', background='yellow')
         self.assertEqual(style.configure('TButton', 'background'),
             'yellow')
-        self.assertTrue(isinstance(style.configure('TButton'), dict))
+        self.assertIsInstance(style.configure('TButton'), dict)
 
 
     def test_map(self):
@@ -26,7 +26,7 @@ class StyleTest(unittest.TestCase):
         style.map('TButton', background=[('active', 'background', 'blue')])
         self.assertEqual(style.map('TButton', 'background'),
             [('active', 'background', 'blue')])
-        self.assertTrue(isinstance(style.map('TButton'), dict))
+        self.assertIsInstance(style.map('TButton'), dict)
 
 
     def test_lookup(self):
@@ -57,7 +57,7 @@ class StyleTest(unittest.TestCase):
         self.assertEqual(style.layout('Treeview'), tv_style)
 
         # should return a list
-        self.assertTrue(isinstance(style.layout('TButton'), list))
+        self.assertIsInstance(style.layout('TButton'), list)
 
         # correct layout, but "option" doesn't exist as option
         self.assertRaises(tkinter.TclError, style.layout, 'Treeview',

Lib/tkinter/test/test_ttk/test_widgets.py

@@ -273,7 +273,7 @@ class CheckbuttonTest(AbstractLabelTest, unittest.TestCase):
         cbtn['command'] = ''
         res = cbtn.invoke()
         self.assertFalse(str(res))
-        self.assertFalse(len(success) > 1)
+        self.assertLessEqual(len(success), 1)
         self.assertEqual(cbtn['offvalue'],
             cbtn.tk.globalgetvar(cbtn['variable']))
 
@@ -454,7 +454,7 @@ class EntryTest(AbstractWidgetTest, unittest.TestCase):
     def test_bbox(self):
         self.assertEqual(len(self.entry.bbox(0)), 4)
         for item in self.entry.bbox(0):
-            self.assertTrue(isinstance(item, int))
+            self.assertIsInstance(item, int)
 
         self.assertRaises(tkinter.TclError, self.entry.bbox, 'noindex')
         self.assertRaises(tkinter.TclError, self.entry.bbox, None)
@@ -652,7 +652,7 @@ class PanedWindowTest(AbstractWidgetTest, unittest.TestCase):
 
         child = ttk.Label()
         self.paned.add(child)
-        self.assertTrue(isinstance(self.paned.pane(0), dict))
+        self.assertIsInstance(self.paned.pane(0), dict)
         self.assertEqual(self.paned.pane(0, weight=None), 0)
         # newer form for querying a single option
         self.assertEqual(self.paned.pane(0, 'weight'), 0)
@@ -679,8 +679,8 @@ class PanedWindowTest(AbstractWidgetTest, unittest.TestCase):
 
         curr_pos = self.paned.sashpos(0)
         self.paned.sashpos(0, 1000)
-        self.assertTrue(curr_pos != self.paned.sashpos(0))
-        self.assertTrue(isinstance(self.paned.sashpos(0), int))
+        self.assertNotEqual(curr_pos, self.paned.sashpos(0))
+        self.assertIsInstance(self.paned.sashpos(0), int)
 
 
 @add_standard_options(StandardTtkOptionsTests)
@@ -720,7 +720,7 @@ class RadiobuttonTest(AbstractLabelTest, unittest.TestCase):
         cbtn2['command'] = ''
         res = cbtn2.invoke()
         self.assertEqual(str(res), '')
-        self.assertFalse(len(success) > 1)
+        self.assertLessEqual(len(success), 1)
         self.assertEqual(cbtn2['value'], myvar.get())
         self.assertEqual(myvar.get(),
             cbtn.tk.globalgetvar(cbtn['variable']))
@@ -982,7 +982,7 @@ class NotebookTest(AbstractWidgetTest, unittest.TestCase):
         self.nb.add(self.child2)
         self.assertEqual(self.nb.tabs(), tabs)
         self.assertEqual(self.nb.index(self.child2), child2_index)
-        self.assertTrue(str(self.child2) == self.nb.tabs()[child2_index])
+        self.assertEqual(str(self.child2), self.nb.tabs()[child2_index])
         # but the tab next to it (not hidden) is the one selected now
         self.assertEqual(self.nb.index('current'), curr + 1)
 
@@ -995,19 +995,19 @@ class NotebookTest(AbstractWidgetTest, unittest.TestCase):
         tabs = self.nb.tabs()
         child1_index = self.nb.index(self.child1)
         self.nb.forget(self.child1)
-        self.assertFalse(str(self.child1) in self.nb.tabs())
+        self.assertNotIn(str(self.child1), self.nb.tabs())
         self.assertEqual(len(tabs) - 1, len(self.nb.tabs()))
 
         self.nb.add(self.child1)
         self.assertEqual(self.nb.index(self.child1), 1)
-        self.assertFalse(child1_index == self.nb.index(self.child1))
+        self.assertNotEqual(child1_index, self.nb.index(self.child1))
 
 
     def test_index(self):
         self.assertRaises(tkinter.TclError, self.nb.index, -1)
         self.assertRaises(tkinter.TclError, self.nb.index, None)
 
-        self.assertTrue(isinstance(self.nb.index('end'), int))
+        self.assertIsInstance(self.nb.index('end'), int)
         self.assertEqual(self.nb.index(self.child1), 0)
         self.assertEqual(self.nb.index(self.child2), 1)
         self.assertEqual(self.nb.index('end'), 2)
@@ -1071,7 +1071,7 @@ class NotebookTest(AbstractWidgetTest, unittest.TestCase):
         self.assertRaises(tkinter.TclError, self.nb.tab, 'notab')
         self.assertRaises(tkinter.TclError, self.nb.tab, None)
 
-        self.assertTrue(isinstance(self.nb.tab(self.child1), dict))
+        self.assertIsInstance(self.nb.tab(self.child1), dict)
         self.assertEqual(self.nb.tab(self.child1, text=None), 'a')
         # newer form for querying a single option
         self.assertEqual(self.nb.tab(self.child1, 'text'), 'a')
@@ -1192,7 +1192,7 @@ class TreeviewTest(AbstractWidgetTest, unittest.TestCase):
 
         bbox = self.tv.bbox(children[0])
         self.assertEqual(len(bbox), 4)
-        self.assertTrue(isinstance(bbox, tuple))
+        self.assertIsInstance(bbox, tuple)
         for item in bbox:
             if not isinstance(item, int):
                 self.fail("Invalid bounding box: %s" % bbox)
@@ -1215,7 +1215,7 @@ class TreeviewTest(AbstractWidgetTest, unittest.TestCase):
         self.assertEqual(self.tv.get_children(), ())
 
         item_id = self.tv.insert('', 'end')
-        self.assertTrue(isinstance(self.tv.get_children(), tuple))
+        self.assertIsInstance(self.tv.get_children(), tuple)
         self.assertEqual(self.tv.get_children()[0], item_id)
 
         # add item_id and child3 as children of child2
@@ -1240,9 +1240,9 @@ class TreeviewTest(AbstractWidgetTest, unittest.TestCase):
 
     def test_column(self):
         # return a dict with all options/values
-        self.assertTrue(isinstance(self.tv.column('#0'), dict))
+        self.assertIsInstance(self.tv.column('#0'), dict)
         # return a single value of the given option
-        self.assertTrue(isinstance(self.tv.column('#0', width=None), int))
+        self.assertIsInstance(self.tv.column('#0', width=None), int)
         # set a new value for an option
         self.tv.column('#0', width=10)
         # testing new way to get option value
@@ -1355,7 +1355,7 @@ class TreeviewTest(AbstractWidgetTest, unittest.TestCase):
 
     def test_heading(self):
         # check a dict is returned
-        self.assertTrue(isinstance(self.tv.heading('#0'), dict))
+        self.assertIsInstance(self.tv.heading('#0'), dict)
 
         # check a value is returned
         self.tv.heading('#0', text='hi')
@@ -1466,7 +1466,7 @@ class TreeviewTest(AbstractWidgetTest, unittest.TestCase):
         self.tv.item(item, values=list(self.tv.item(item, values=None)))
         self.assertEqual(self.tv.item(item, values=None), (value, ))
 
-        self.assertTrue(isinstance(self.tv.item(item), dict))
+        self.assertIsInstance(self.tv.item(item), dict)
 
         # erase item values
         self.tv.item(item, values='')
@@ -1567,7 +1567,7 @@ class TreeviewTest(AbstractWidgetTest, unittest.TestCase):
             'blue')
         self.assertEqual(str(self.tv.tag_configure('test', foreground=None)),
             'blue')
-        self.assertTrue(isinstance(self.tv.tag_configure('test'), dict))
+        self.assertIsInstance(self.tv.tag_configure('test'), dict)
 
 
 @add_standard_options(StandardTtkOptionsTests)