test_singleton

Complexity

Total Complexity

3

Size/Duplication

Total Lines	27
Duplicated Lines	0 %

Importance

Changes

0

1 Method

Rating	Name	Duplication	Size	Complexity
A	tests.test_singleton.test_singleton()	0	26	3

def test_singleton():
    from so_magic.utils import Singleton

    class ObjectRegistry(metaclass=Singleton):
        def __init__(self):
            super().__init__()
            self.objects = {}

    reg1 = ObjectRegistry()
    reg1.objects['a'] = 1
    reg2 = ObjectRegistry()
    assert reg2.objects == {'a': 1}
    reg2.objects['b'] = 2
    reg3 = ObjectRegistry()

    rs = [reg1, reg2, reg3]

    assert id(reg1) == id(reg2) == id(reg3)
    for i in rs:
        assert i.objects == {'a': 1, 'b': 2}
    assert all(x.objects == {'a': 1,
                             'b': 2} for x in rs)
    del reg3.objects['a']
    assert all(x.objects == {'b': 2} for x in rs)
    for i in rs:
        assert i.objects == {'b': 2}