def test_push_and_pop(self):
stack = StackWithMin()
stack.push(1)
stack.push(2)
stack.push(3)
self.assertEqual(stack.pop(), 3)
self.assertEqual(stack.pop(), 2)
def test_push_and_pop(self):
stack = StackWithMin()
stack.push(1)
stack.push(2)
stack.push(3)
self.assertEqual(stack.pop(), 3)
self.assertEqual(stack.pop(), 2)
def test_min(self):
stack = StackWithMin()
stack.push(3)
stack.push(2)
stack.push(1)
self.assertEqual(stack.min(), 1)
stack.pop()
self.assertEqual(stack.min(), 2)
stack.pop()
self.assertEqual(stack.min(), 3)
def test_min(self):
stack = StackWithMin()
stack.push(3)
stack.push(2)
stack.push(1)
self.assertEqual(stack.min(), 1)
stack.pop()
self.assertEqual(stack.min(), 2)
stack.pop()
self.assertEqual(stack.min(), 3)
