Python Signal.register Exemples

Exemple #1

def test_suspend_blocks_emissions():
    s = Signal('foo', 'bar', 'baz')
    cb = Mock()
    s.register('foo', cb.foo)
    s.register('bar', cb.bar)
    s.register('baz', cb.baz)

    s.emit('foo', 123, this='that')
    s.emit('bar', 456, hey='ho')
    s.emit('baz', 789, zip='zop')
    assert cb.mock_calls == [
        call.foo(123, this='that'),
        call.bar(456, hey='ho'),
        call.baz(789, zip='zop'),
    ]
    cb.reset_mock()

    with s.suspend('bar', 'foo'):
        s.emit('foo', 123, this='that')
        s.emit('bar', 456, hey='ho')
        s.emit('baz', 789, zip='zop')
    assert cb.mock_calls == [
        call.baz(789, zip='zop'),
    ]
    cb.reset_mock()

    s.emit('foo', 123, this='that')
    s.emit('bar', 456, hey='ho')
    s.emit('baz', 789, zip='zop')
    assert cb.mock_calls == [
        call.foo(123, this='that'),
        call.bar(456, hey='ho'),
        call.baz(789, zip='zop'),
    ]

Exemple #2

def test_replay_emits():
    emissions = (
        ('foo', {
            'args': (123, ),
            'kwargs': {}
        }),
        ('bar', {
            'args': ('hello', 'world'),
            'kwargs': {}
        }),
        ('foo', {
            'args': ('and', ),
            'kwargs': {
                'this': 'that'
            }
        }),
        ('bar', {
            'args': (),
            'kwargs': {
                'four': 56
            }
        }),
    )
    s = Signal('foo', 'bar', 'baz')
    cb = Mock()
    s.register('foo', cb.foo)
    s.register('bar', cb.bar)
    s.register('baz', cb.baz)
    s.replay(emissions)
    assert cb.mock_calls == [
        call.foo(123),
        call.bar('hello', 'world'),
        call.foo('and', this='that'),
        call.bar(four=56),
    ]

Exemple #3

def test_emit_to_single_callback(args, kwargs):
    s = Signal('foo', 'bar')
    cb = Mock()
    s.register('foo', cb)
    s.emit('foo', *args, **kwargs)
    assert cb.call_args_list == [call(*args, **kwargs)]
    s.emit('bar', *args, **kwargs)
    assert cb.call_args_list == [call(*args, **kwargs)]

Exemple #4

def test_emit_to_multiple_callbacks(args, kwargs):
    s = Signal('foo', 'bar')
    cb = Mock()
    s.register('foo', cb.a)
    s.register('foo', cb.b)
    s.register('foo', cb.c)
    s.register('bar', cb.d)
    s.register('bar', cb.e)
    s.register('bar', cb.f)
    s.emit('foo', *args, **kwargs)
    assert cb.mock_calls == [
        call.a(*args, **kwargs),
        call.b(*args, **kwargs),
        call.c(*args, **kwargs),
    ]
    s.emit('bar')
    assert cb.mock_calls == [
        call.a(*args, **kwargs),
        call.b(*args, **kwargs),
        call.c(*args, **kwargs),
        call.d(),
        call.e(),
        call.f(),
    ]

Exemple #5

def test_registering_noncallable():
    s = Signal('foo')
    with pytest.raises(TypeError, match=r"^Not a callable: 'bar'$"):
        s.register('foo', 'bar')

Exemple #6

def test_registering_for_unknown_signal():
    s = Signal('foo')
    with pytest.raises(ValueError, match=r"^Unknown signal: 'bar'$"):
        s.register('bar', lambda: None)