def test1(self):
ms = MinStack()
ms.push(2)
ms.push(6)
ms.push(4)
ms.push(1)
ms.push(5)
ms.push(1)
res = ms.get_min()
self.assertEqual(1, res)
ms.pop()
res = ms.get_min()
self.assertEqual(1, res)
ms.pop()
res = ms.get_min()
self.assertEqual(1, res)
ms.pop()
res = ms.get_min()
self.assertEqual(2, res)
ms.pop()
res = ms.get_min()
self.assertEqual(2, res)
res2 = ms.pop()
self.assertEqual(6, res2)
res = ms.get_min()
self.assertEqual(2, res)
res2 = ms.pop()
self.assertEqual(2, res2)
