mirror of
https://github.com/micropython/micropython.git
synced 2026-04-26 02:40:22 +02:00
Damien George
59 lines
1.5 KiB
Python
59 lines
1.5 KiB
Python
# Test weakref.finalize() functionality that doesn't require gc.collect().
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try:
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import weakref
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except ImportError:
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print("SKIP")
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raise SystemExit
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# Cannot reference non-heap objects.
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for value in (None, False, True, Ellipsis, 0, "", ()):
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try:
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weakref.finalize(value, lambda: None)
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except TypeError:
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print(value, "TypeError")
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# Convert (obj, func, args, kwargs) so CPython and MicroPython have a chance to match.
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def convert_4_tuple(values):
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if values is None:
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return None
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return (type(values[0]).__name__, type(values[1]), values[2], values[3])
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class A:
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def __str__(self):
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return "<A object>"
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print("test alive, peek, detach")
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a = A()
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f = weakref.finalize(a, lambda: None, 1, 2, kwarg=3)
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print("alive", f.alive)
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print("peek", convert_4_tuple(f.peek()))
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print("detach", convert_4_tuple(f.detach()))
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print("alive", f.alive)
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print("peek", convert_4_tuple(f.peek()))
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print("detach", convert_4_tuple(f.detach()))
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print("call", f())
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a = None
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print("test alive, peek, call")
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a = A()
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f = weakref.finalize(a, lambda *args, **kwargs: (args, kwargs), 1, 2, kwarg=3)
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print("alive", f.alive)
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print("peek", convert_4_tuple(f.peek()))
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print("call", f())
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print("alive", f.alive)
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print("peek", convert_4_tuple(f.peek()))
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print("call", f())
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print("detach", convert_4_tuple(f.detach()))
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print("test call which raises exception")
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a = A()
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f = weakref.finalize(a, lambda: 1 / 0)
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try:
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f()
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except ZeroDivisionError as er:
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print("call ZeroDivisionError")
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