def test_equals(self):
s = Stack(1, 2, 3, "Hello", "World")
t = Stack(1, 2, 3, "Hello", "World")
self.assertTrue(s.equals(Stack(1, 2, 3, "Hello", "World")))
self.assertFalse(s.equals(Stack(1, 2, 3, "Hello", "World1")))
self.assertFalse(s.equals(Stack(1, 2, 3, "Hello")))
def test_reverse(self):
s = Stack(1, 2, 3, "Hello", "World")
reverse(s)
self.assertTrue(s.equals(Stack("World", "Hello", 3, 2, 1)))
def test_sort(self):
s = Stack(-3, 15, 18, -5, 30)
sort(s)
self.assertTrue(s.equals(Stack(-5, -3, 15, 18, 30)))
def test_push(self):
s = Stack()
s.push(1).push("Hello")
self.assertTrue(s.equals(Stack(1, "Hello")))
