def test_stack_copy(self):
stk = Stack()
random_values = get_random_values()
for v in random_values:
stk.push(v)
copied_stk = stk.copy()
for v in random_values[::-1]:
self.assertEqual(copied_stk.peek(), v)
copied_stk.pop()
self.assertEqual(stk.size(), len(random_values))
