#7031: Add TestCase.assertIsInstance and negated method.
diff --git a/Lib/unittest/case.py b/Lib/unittest/case.py
index fb96a88..113422c 100644
--- a/Lib/unittest/case.py
+++ b/Lib/unittest/case.py
@@ -817,6 +817,19 @@
standardMsg = 'unexpectedly None'
self.fail(self._formatMessage(msg, standardMsg))
+ def assertIsInstance(self, obj, cls, msg=None):
+ """Same as self.assertTrue(isinstance(obj, cls)), with a nicer
+ default message."""
+ if not isinstance(obj, cls):
+ standardMsg = '%r is not an instance of %r' % (obj, cls)
+ self.fail(self._formatMessage(msg, standardMsg))
+
+ def assertNotIsInstance(self, obj, cls, msg=None):
+ """Included for symmetry with assertIsInstance."""
+ if isinstance(obj, cls):
+ standardMsg = '%r is an instance of %r' % (obj, cls)
+ self.fail(self._formatMessage(msg, standardMsg))
+
def assertRaisesRegexp(self, expected_exception, expected_regexp,
callable_obj=None, *args, **kwargs):
"""Asserts that the message in a raised exception matches a regexp.