def METHOD_NAME():
    """Test any conversion from a float dtype to an other."""
    x = np.array([-1, 1])
    # Test all combinations of dtypes conversions
    dtype_combin = np.array(np.meshgrid(float_dtype_list,
                                        float_dtype_list)).T.reshape(-1, 2)
    for dtype_in, dtype_out in dtype_combin:
        x = x.astype(dtype_in)
        y = _convert(x, dtype_out)
        assert y.dtype == np.dtype(dtype_out)