def METHOD_NAME(self):
    d = {}
    self.assertNotIn('a', d)
    self.assertFalse('a' in d)
    self.assertTrue('a' not in d)
    d = {'a': 1, 'b': 2}
    self.assertIn('a', d)
    self.assertIn('b', d)
    self.assertNotIn('c', d)
    '''
        The direct call of __contains__ on a dict is currently not working
        in skulpt
    '''
    self.assertRaises(TypeError, d.__contains__)