Function check_strides

tests/test_buffers.py:346–353

(mat)

@pytest.mark.parametrize("type", ["pybind11", "numpy"])
def test_to_pybuffer_contiguity(type):
    def check_strides(mat):
        # The full block is memset to 0, so fill it with non-zero in real spots.
        expected = np.arange(1, 5 * 4 + 1).reshape((5, 4))
        for i in range(5):
            for j in range(4):
                mat[i, j] = expected[i, j]
        # If all strides are correct, the exposed buffer should match the input.
        np.testing.assert_array_equal(np.array(mat), expected)

    if type == "pybind11":
        cmat = m.Matrix(5, 4)  # C contiguous.