def test_withoutFlags(self): val = 0 nb = 0 def fn1(v): nonlocal val, nb val = v nb += 1 def fn2(v): nonlocal val, nb val = -v nb += 1 def check1(v): nonlocal self, val, nb self.assertIs(v,val) nb += 1 def check2(v): nonlocal self, val, nb self.assertIs(-v,val) nb += 1 c = Callbacks() c.add(fn1).add(check1) c.fire(1) c.add(fn2).add(check2) c.fire(2) c.remove(fn2).remove(check2).add(check1) c.fire(3) self.assertEqual(nb,9)
class Deferred: def __init__ (self, beforeStart=None): self._resolvedCallbacks = Callbacks(once=True, memory=True) self._rejectedCallbacks = Callbacks(once=True, memory=True) self._progressCallbacks = Callbacks(memory=True) self._states = ['pending','rejected','resolved'] self._state = self._states[0] if beforeStart is not None: beforeStart(self) def reject (self, *args, **kwargs): if self.pending(): self._rejectedCallbacks.fire(*args, **kwargs) return self def resolve (self, *args, **kwargs): if self.pending(): self._resolvedCallbacks.fire(*args, **kwargs) return self def notify (self, *args, **kwargs): if self.pending(): self._progressCallbacks.fire(*args, **kwargs) return self def _addListener (self, callbacks, fn, *args): for arg in args: if isfunction(arg): callbacks.add(arg) elif isinstance(arg, Deferred): callbacks.add(lambda *args, **kwargs:getattr(arg, fn)(*args,**kwargs)) return self def progress (self, *args): return self._addListener(self._progressCallbacks, 'notify', *args) def done (self, *args): return self._addListener(self._resolvedCallbacks, 'resolve', *args) def fail (self, *args): return self._addListener(self._rejectedCallbacks, 'reject', *args) def always (self, *args): return self.done(*args).fail(*args) def pending (self): return self._state is self._states[0] def rejected (self): return self._state is self._states[1] def resolved (self): return self._state is self._states[2]
