'Test that each isTypeTk return correct bool.'

def test_isfuncs(self):

    for (func, whentrue) in self.isfuncs:
        for tktype in alltypes:
            with self.subTest(func=func, whentrue=whentrue, tktype=tktype):
                macosx._tk_type = tktype
                (self.assertTrue if (tktype in whentrue) else self.assertFalse)(func())
