def test_callback_var_args(): holder = [] d = Deferred() d.add_callback(lambda *args, **kwargs: holder.append((args, kwargs)), 2, 3, a=4, b=5) d.callback(1) assert holder[0] == ((1, 2, 3), {'a': 4, 'b': 5})
def test_callback_resolution(): d = Deferred() d.add_callback(lambda r: fail(Exception(r + "b"))) d.add_errback(lambda e: e.value.args[0] + "c") d.add_callbacks(lambda r: r + "d", lambda e: e.value.args[0] + 'f') d.callback("a") assert d.result == "abcd"
def test_callback_resolution_weaving(): d = Deferred() d.add_callbacks(lambda r: fail(Exception(r + "b")), lambda e: e.value.args[0] + 'w') d.add_callbacks(lambda e: Exception(e + "x"), lambda e: e.value.args[0] + "c") d.add_callbacks(lambda r: Exception(r + "d"), lambda e: e.value.args[0] + 'y') d.add_callbacks(lambda r: r + "z", lambda e: e.value.args[0] + 'e') d.callback("a") assert d.result == "abcde"
def test_deferred_dict(): d = Deferred() dd = DeferredDict({'a': 1, 'b': d}) assert not dd.called d.callback(2) assert dd.called assert dd.result == {'a': 1, 'b': 2}
def test_deferred_list(): d = Deferred() dl = DeferredList([1, d]) assert not dl.called d.callback(2) assert dl.called assert dl.result == [1, 2]
def test_callback_raises_exception(): def callback(val): raise AttributeError(val) d = Deferred() d.add_callback(callback) d.callback('test') assert isinstance(d.result, DeferredException) assert isinstance(d.result.value, AttributeError) assert d.result.value.args[0] == "test"
def test_deferred_dict(): d = Deferred() dd = DeferredDict({ 'a': 1, 'b': d }) assert not dd.called d.callback(2) assert dd.called assert dd.result == {'a': 1, 'b': 2}
def test_deferred_list(): d = Deferred() dl = DeferredList([ 1, d ]) assert not dl.called d.callback(2) assert dl.called assert dl.result == [1, 2]
def test_deferred_callback_returns_another_deferred(): d = Deferred() d2 = Deferred() d.add_callback(lambda r: succeed(r + 5).add_callback(lambda v: v + 5)) d.add_callback(lambda r: d2) d.callback(5) assert d.result is d2 assert d.paused assert d.called d2.callback(7) assert d.result == 7 assert d2.result == 7
def test_deferred_list_fails(): d1 = Deferred() d2 = Deferred() d3 = Deferred() dl = DeferredList([1, succeed(2), d1, d2, d3]) assert not dl.called e1 = Exception('d1 failed') d1.errback(e1) d2.errback(Exception('d2 failed')) d3.callback('hello') assert dl.called assert isinstance(dl.result, DeferredException) assert dl.result.value == e1
def test_deferred_list_fails(): d1 = Deferred() d2 = Deferred() d3 = Deferred() dl = DeferredList([ 1, succeed(2), d1, d2, d3 ]) assert not dl.called e1 = Exception('d1 failed') d1.errback(e1) d2.errback(Exception('d2 failed')) d3.callback('hello') assert dl.called assert isinstance(dl.result, DeferredException) assert dl.result.value == e1
def test_cant_callback_twice(): d1 = Deferred() d1.callback('hello') with raises(AlreadyCalledDeferred): d1.callback('world')