1 files changed, 12 insertions, 0 deletions
diff --git a/Lib/tkinter/test/test_tkinter/test_widgets.py b/Lib/tkinter/test/test_tkinter/test_widgets.py
index 141bbf6..7b89c74 100644
--- a/Lib/tkinter/test/test_tkinter/test_widgets.py
+++ b/Lib/tkinter/test/test_tkinter/test_widgets.py
@@ -457,6 +457,18 @@ class SpinboxTest(EntryTest, unittest.TestCase):
         widget = self.create()
         self.checkBooleanParam(widget, 'wrap')
 
+    def test_bbox(self):
+        widget = self.create()
+        bbox = widget.bbox(0)
+        self.assertEqual(len(bbox), 4)
+        for item in bbox:
+            self.assertIsInstance(item, int)
+
+        self.assertRaises(tkinter.TclError, widget.bbox, 'noindex')
+        self.assertRaises(tkinter.TclError, widget.bbox, None)
+        self.assertRaises(TypeError, widget.bbox)
+        self.assertRaises(TypeError, widget.bbox, 0, 1)
+
 
 @add_standard_options(StandardOptionsTests)
 class TextTest(AbstractWidgetTest, unittest.TestCase):