def test_listeners__6():
"""
Should not return the original object, but a copy.
"""
emitter = Emitter()
emitter.on("event", callable)
assert emitter.listeners("event") is not emitter.listeners("event")
def test_listeners__6():
"""
Should not return the original object, but a copy.
"""
emitter = Emitter()
emitter.on("event", callable)
assert emitter.listeners("event") is not emitter.listeners("event")
def test_listeners__1():
"""
Returns an empty list when asking for an unknown event.
"""
emitter = Emitter()
assert isinstance(emitter.listeners(""), list)
assert emitter.listeners("") == []
def test_listeners__1():
"""
Returns an empty list when asking for an unknown event.
"""
emitter = Emitter()
assert isinstance(emitter.listeners(""), list)
assert emitter.listeners("") == []
def test_off__7():
"""
A listener of the True event can be removed.
"""
emitter = Emitter()
emitter.on(True, callable)
assert callable in emitter.listeners(True)
emitter.off(True, callable)
assert callable not in emitter.listeners(True)
def test_off__7():
"""
A listener of the True event can be removed.
"""
emitter = Emitter()
emitter.on(True, callable)
assert callable in emitter.listeners(True)
emitter.off(True, callable)
assert callable not in emitter.listeners(True)
def test_off__6():
"""
A listener of the False event can be removed.
"""
emitter = Emitter()
emitter.on(False, callable)
assert callable in emitter.listeners(False)
emitter.off(False, callable)
assert callable not in emitter.listeners(False)
def test_off__6():
"""
A listener of the False event can be removed.
"""
emitter = Emitter()
emitter.on(False, callable)
assert callable in emitter.listeners(False)
emitter.off(False, callable)
assert callable not in emitter.listeners(False)
def test_once__2():
"""
Listener should be removed after call.
"""
emitter = Emitter()
emitter.once("event", callable)
emitter.on("event", bool)
emitter.emit("event")
assert callable not in emitter.listeners("event")
assert bool in emitter.listeners("event")
def test_once__2():
"""
Listener should be removed after call.
"""
emitter = Emitter()
emitter.once("event", callable)
emitter.on("event", bool)
emitter.emit("event")
assert callable not in emitter.listeners("event")
assert bool in emitter.listeners("event")
def test_on__7():
"""
Multiple listeners can be registered for an event.
"""
emitter = Emitter()
emitter.on("event", callable)
emitter.on("event", bool)
assert callable in emitter.listeners("event")
assert bool in emitter.listeners("event")
def test_on__7():
"""
Multiple listeners can be registered for an event.
"""
emitter = Emitter()
emitter.on("event", callable)
emitter.on("event", bool)
assert callable in emitter.listeners("event")
assert bool in emitter.listeners("event")
class TestEmitter(TestCase):
def setUp(self):
self.emitter = Emitter()
def test_call_listeners(self):
called = [False]
def cb():
called[0] = True
self.emitter.on('hello.*', cb)
self.emitter.emit('hello.foo')
assert called[0]
self.emitter.remove('hello.*', cb)
assert self.emitter.listeners('hello') == []
def test_pass_data_to_listeners(self):
def cb(*args):
assert args == ('a', 'b')
self.emitter.on('data', cb)
self.emitter.emit('data', 'a', 'b')
def test_call_listeners_once(self):
called = [False]
def cb():
called[0] = not called[0]
self.emitter.on('once', cb, True)
self.emitter.emit('*')
self.emitter.emit('on*')
assert called[0]
def test_remove_listeners(self):
self.emitter.on('foo', lambda x: x)
self.emitter.on('bar', lambda x: x)
self.emitter.remove('bar')
self.emitter.remove('*')
assert self.emitter.listeners('foo') == []
assert self.emitter.listeners('bar') == []
def test_emit_unknown_events(self):
self.emitter.emit('quux')
self.emitter.remove('wut')
def test_provide_listeners(self):
def cb(): pass
self.emitter.on('quux', cb)
assert self.emitter.listeners('*') == [cb]
def test_error__4(spy):
"""
One time listener is removed even if it raises exception.
"""
emitter = Emitter()
emitter.once("event", raise_error)
assert len(emitter.listeners("event")) == 1
emitter.emit("event")
assert len(emitter.listeners("event")) == 0
def test_on__8():
"""
Listeners are not shared between events.
"""
emitter = Emitter()
emitter.on("event1", str)
emitter.on("event2", callable)
assert str in emitter.listeners("event1")
assert str not in emitter.listeners("event2")
assert callable in emitter.listeners("event2")
assert callable not in emitter.listeners("event1")
def test_on__8():
"""
Listeners are not shared between events.
"""
emitter = Emitter()
emitter.on("event1", str)
emitter.on("event2", callable)
assert str in emitter.listeners("event1")
assert str not in emitter.listeners("event2")
assert callable in emitter.listeners("event2")
assert callable not in emitter.listeners("event1")
def test_off__2():
"""
When called with 1 argument, it removes only the listeners of the
specified event.
"""
emitter = Emitter()
emitter.on("event", callable)
emitter.on("event", str)
emitter.on("raccoon", callable)
emitter.on("raccoon", str)
emitter.off("event")
assert emitter.listeners("event") == []
assert callable in emitter.listeners("raccoon")
assert str in emitter.listeners("raccoon")
def test_error__5(spy):
"""
One time ERROR listener is removed even if it raises exception.
"""
emitter = Emitter()
emitter.once(Emitter.ERROR, spy.throw)
emitter.on("event", raise_error)
assert len(emitter.listeners(Emitter.ERROR)) == 1
with pytest.raises(Exception):
emitter.emit("event")
assert len(emitter.listeners(Emitter.ERROR)) == 0
def test_off__2():
"""
When called with 1 argument, it removes only the listeners of the
specified event.
"""
emitter = Emitter()
emitter.on("event", callable)
emitter.on("event", str)
emitter.on("raccoon", callable)
emitter.on("raccoon", str)
emitter.off("event")
assert emitter.listeners("event") == []
assert callable in emitter.listeners("raccoon")
assert str in emitter.listeners("raccoon")
def test_listeners__4():
"""
Get the listeners for the False event.
"""
emitter = Emitter()
emitter.on(False, callable)
assert callable in emitter.listeners(False)
def test_on__9():
"""
Returns True when event has been successfully registered.
"""
emitter = Emitter()
assert emitter.on("event", callable) is True
assert callable in emitter.listeners("event")
def test_listeners__5():
"""
Get the listeners for the True event.
"""
emitter = Emitter()
emitter.on(True, callable)
assert callable in emitter.listeners(True)
def test_on__9():
"""
Returns True when event has been successfully registered.
"""
emitter = Emitter()
assert emitter.on("event", callable) is True
assert callable in emitter.listeners("event")
def test_listeners__5():
"""
Get the listeners for the True event.
"""
emitter = Emitter()
emitter.on(True, callable)
assert callable in emitter.listeners(True)
def test_listeners__4():
"""
Get the listeners for the False event.
"""
emitter = Emitter()
emitter.on(False, callable)
assert callable in emitter.listeners(False)
def test_once__4():
"""
Allow updating an event from once() to on().
"""
emitter = Emitter()
emitter.on("event", callable)
emitter.once("event", callable)
emitter.emit("event")
assert callable not in emitter.listeners("event")
def test_once__4():
"""
Allow updating an event from once() to on().
"""
emitter = Emitter()
emitter.on("event", callable)
emitter.once("event", callable)
emitter.emit("event")
assert callable not in emitter.listeners("event")
def test_off__3():
"""
Called with 2 arguments, it removes the specified listener of the specified
event.
"""
emitter = Emitter()
emitter.on("event", callable)
emitter.on("event", str)
emitter.off("event", callable)
listeners = emitter.listeners("event")
assert callable not in listeners
assert str in listeners
def test_listeners__2():
"""
Returns a list containing all the listeners of the given event.
"""
emitter = Emitter()
emitter.on("event", callable)
emitter.on("event", list)
listeners = emitter.listeners("event")
assert isinstance(listeners, list)
assert listeners == [callable, list]
def test_listeners__3():
"""
The insertion order of the listeners should be conserved.
"""
emitter = Emitter()
emitter.on("raccoon", bool)
emitter.on("raccoon", callable)
emitter.on("raccoon", dict)
listeners = emitter.listeners("raccoon")
assert listeners == [bool, callable, dict]
def test_listeners__3():
"""
The insertion order of the listeners should be conserved.
"""
emitter = Emitter()
emitter.on("raccoon", bool)
emitter.on("raccoon", callable)
emitter.on("raccoon", dict)
listeners = emitter.listeners("raccoon")
assert listeners == [bool, callable, dict]
def test_listeners__2():
"""
Returns a list containing all the listeners of the given event.
"""
emitter = Emitter()
emitter.on("event", callable)
emitter.on("event", list)
listeners = emitter.listeners("event")
assert isinstance(listeners, list)
assert listeners == [callable, list]
def test_off__3():
"""
Called with 2 arguments, it removes the specified listener of the specified
event.
"""
emitter = Emitter()
emitter.on("event", callable)
emitter.on("event", str)
emitter.off("event", callable)
listeners = emitter.listeners("event")
assert callable not in listeners
assert str in listeners
def test_once__5():
"""
One time listeners should be removed even if an error happens.
"""
emitter = Emitter()
def listener(*args, **kwargs):
raise Exception()
emitter.once("event", listener)
emitter.emit("event")
assert listener not in emitter.listeners("event")
def test_once__5():
"""
One time listeners should be removed even if an error happens.
"""
emitter = Emitter()
def listener(*args, **kwargs):
raise Exception()
emitter.once("event", listener)
emitter.emit("event")
assert listener not in emitter.listeners("event")
