Method assertIsSubclass

Lib/test/support/testcase.py:7–11

(self, cls, superclass, msg=None)

class ExtraAssertions:

    def assertIsSubclass(self, cls, superclass, msg=None):
        if issubclass(cls, superclass):
            return
        standardMsg = f'{cls!r} is not a subclass of {superclass!r}'
        self.fail(self._formatMessage(msg, standardMsg))

    def assertNotIsSubclass(self, cls, superclass, msg=None):
        if not issubclass(cls, superclass):