test_sets.py 文件源码

def test_constructor(self):
        inner = Set([1])
        outer = Set([inner])
        element = outer.pop()
        self.assertEqual(type(element), ImmutableSet)
        outer.add(inner)        # Rebuild set of sets with .add method
        outer.remove(inner)
        self.assertEqual(outer, Set())   # Verify that remove worked
        outer.discard(inner)    # Absence of KeyError indicates working fine

#==============================================================================