def METHOD_NAME(self):
    """ Simplest possible check: N==M, unit matrix """
    X_in = (
        (1, 2, 3, 4),
        (5, 6, 7, 8),
    )
    A = (
        (1, 0),
        (0, 1),
    )
    self.run_once(X_in, A, datatype='complex')