Function test_observe_iterables

tests/test_traitlets.py:2745–2782

()

def test_observe_iterables():
    class C(HasTraits):
        i = Integer()
        s = Unicode()

    c = C()
    recorded = {}

    def record(change):
        recorded["change"] = change

    # observe with names=set
    c.observe(record, names={"i", "s"})
    c.i = 5
    assert recorded["change"].name == "i"
    assert recorded["change"].new == 5
    c.s = "hi"
    assert recorded["change"].name == "s"
    assert recorded["change"].new == "hi"

    # observe with names=custom container with iter, contains
    class MyContainer:
        def __init__(self, container):
            self.container = container

        def __iter__(self):
            return iter(self.container)

        def __contains__(self, key):
            return key in self.container

    c.observe(record, names=MyContainer({"i", "s"}))
    c.i = 10
    assert recorded["change"].name == "i"
    assert recorded["change"].new == 10
    c.s = "ok"
    assert recorded["change"].name == "s"
    assert recorded["change"].new == "ok"


def test_super_args():