    def test_sim_matrix(self):
        '''
        test the sim_matrix function
        Returns:None
        '''
        x = torch.randn(1, 24)
        y = torch.randn(1, 24)
        out = sim_matrix(x, y)
        self.assertEqual(out.shape, (1, 1))
test the sim_matrix function
Returns:None
tests/unittests/models/frozen_in_time/test_frozen_utils.py