test_c.py 文件源码

def test_new_handle():
    import _weakref
    BVoidP = new_pointer_type(new_void_type())
    BCharP = new_pointer_type(new_primitive_type("char"))
    class mylist(list):
        pass
    o = mylist([2, 3, 4])
    x = newp_handle(BVoidP, o)
    assert repr(x) == "<cdata 'void *' handle to [2, 3, 4]>"
    assert x
    assert from_handle(x) is o
    assert from_handle(cast(BCharP, x)) is o
    wr = _weakref.ref(o)
    del o
    import gc; gc.collect()
    assert wr() is not None
    assert from_handle(x) == list((2, 3, 4))
    assert from_handle(cast(BCharP, x)) == list((2, 3, 4))
    del x
    for i in range(3):
        if wr() is not None:
            import gc; gc.collect()
    assert wr() is None
    py.test.raises(RuntimeError, from_handle, cast(BCharP, 0))