def test_delta_estimate(self): """Test if a 2-dimensional numpy array is returned. """ crkr = CrKr(self.S_2x3, self.C_2x2, self.D_2x3) new_s = np.array([[1, 2, 5]]) delta_estimate = crkr.delta_estimate(new_s) assert_equal(delta_estimate.shape, (1, self.S_2x3.shape[1]))