def METHOD_NAME(self):
    """Test behaviour when providing single lon,lat values."""
    # Single values must raise error
    with pytest.raises(ValueError):
        SMultiPoint(2, 1)
    # Array values must not raise error
    p = SMultiPoint([2], [1])
    assert p.lon.shape == (1,)
    assert p.lat.shape == (1,)
    assert p.vertices.shape == (1, 2)