Test that different types of cells are handled correctly.

Tests that local descriptors handle the centers argument correctly.

Tests that the function used to query combination locations in the MBTR output works.

Test that an exception is raise when invalid location is requested.

Tests that the correct peaks are present in the descriptor output.

Tests that the normalization of the output is done correctly.

Tests the periodic images are correctly seen by the descriptor.

Tests that the descriptor can correctly handle differently described systems