test_weakset.py 文件源码

def test_union(self):
        u = self.s.union(self.items2)
        for c in self.letters:
            self.assertEqual(c in u, c in self.d or c in self.items2)
        self.assertEqual(self.s, WeakSet(self.items))
        self.assertEqual(type(u), WeakSet)
        self.assertRaises(TypeError, self.s.union, [[]])
        for C in set, frozenset, dict.fromkeys, list, tuple:
            x = WeakSet(self.items + self.items2)
            c = C(self.items2)
            self.assertEqual(self.s.union(c), x)
            del c
        self.assertEqual(len(u), len(self.items) + len(self.items2))
        self.items2.pop()
        gc.collect()
        self.assertEqual(len(u), len(self.items) + len(self.items2))