Mercurial > hg
view tests/test-extensions-wrapfunction.py @ 50175:0ab92dabea6e
typing: add type hints to pycompat.maplist()
The typeshed hints define 5 overloads with an increasing number of parameters on
the passed function, and then a catchall that ignores the argument list on the
passed function and allows an `*iterators` arg. All of our uses are fulfilled
by the 1 function + 1 iterable overload, but add the second overload as a hint
in case it's needed in the future.
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Tue, 21 Feb 2023 13:24:12 -0500 |
parents | 642e31cb55f0 |
children | 493034cc3265 |
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from mercurial import extensions def genwrapper(x): def f(orig, *args, **kwds): return [x] + orig(*args, **kwds) f.x = x return f def getid(wrapper): return getattr(wrapper, 'x', '-') wrappers = [genwrapper(i) for i in range(5)] class dummyclass: def getstack(self): return ['orig'] dummy = dummyclass() def batchwrap(wrappers): for w in wrappers: extensions.wrapfunction(dummy, 'getstack', w) print('wrap %d: %s' % (getid(w), dummy.getstack())) def batchunwrap(wrappers): for w in wrappers: result = None try: result = extensions.unwrapfunction(dummy, 'getstack', w) msg = str(dummy.getstack()) except (ValueError, IndexError) as e: msg = e.__class__.__name__ print('unwrap %s: %s: %s' % (getid(w), getid(result), msg)) batchwrap(wrappers + [wrappers[0]]) batchunwrap( [ (wrappers[i] if i is not None and i >= 0 else None) for i in [3, None, 0, 4, 0, 2, 1, None] ] ) wrap0 = extensions.wrappedfunction(dummy, 'getstack', wrappers[0]) wrap1 = extensions.wrappedfunction(dummy, 'getstack', wrappers[1]) # Use them in a different order from how they were created to check that # the wrapping happens in __enter__, not in __init__ print('context manager', dummy.getstack()) with wrap1: print('context manager', dummy.getstack()) with wrap0: print('context manager', dummy.getstack()) # Bad programmer forgets to unwrap the function, but the context # managers still unwrap their wrappings. extensions.wrapfunction(dummy, 'getstack', wrappers[2]) print('context manager', dummy.getstack()) print('context manager', dummy.getstack()) print('context manager', dummy.getstack()) # Wrap callable object which has no __name__ class callableobj: def __call__(self): return ['orig'] dummy.cobj = callableobj() extensions.wrapfunction(dummy, 'cobj', wrappers[0]) print('wrap callable object', dummy.cobj())