Method test_immutable

test/base/test_utils.py:508–521

(self, d)

class ImmutableTest(fixtures.TestBase):
    @combinations(util.immutabledict({1: 2, 3: 4}), util.FacadeDict({2: 3}))
    def test_immutable(self, d):
        calls = (
            lambda: d.__delitem__(1),
            lambda: d.__setitem__(2, 3),
            lambda: d.__setattr__(2, 3),
            d.clear,
            lambda: d.setdefault(1, 3),
            lambda: d.update({2: 4}),
        )
        if hasattr(d, "pop"):
            calls += (lambda: d.pop(2), d.popitem)
        for m in calls:
            with expect_raises_message(TypeError, "object is immutable"):
                m()

    def test_readonly_properties(self):
        d = util.ReadOnlyProperties({3: 4})