def METHOD_NAME(self):
    print("test envelope detection")
    # absolute value
    _abs = apply_b_mode(self.test_image, method=Tags.RECONSTRUCTION_BMODE_METHOD_ABS)
    expected_abs = np.array([[1.2, 0.], [3., 255.]])
    assert np.equal(_abs, expected_abs).all(), "computed absolute array and expected don't match"
    # Hilbert transform
    hilbert = apply_b_mode(self.test_image, method=Tags.RECONSTRUCTION_BMODE_METHOD_HILBERT_TRANSFORM)
    expected_hilbert = np.array([[1.2, 0.], [3., 255.]])
    assert np.equal(hilbert, expected_hilbert).all(), "computed hilbert transform array and expected don't match"