def test_normal_case2(self):
s = tT.Solution()
self.assertEqual(1, s.trap([0, 1, 0, 1, 0]))
def test_normal_case(self):
s = tT.Solution()
self.assertEqual(6, s.trap([0, 1, 0, 2, 1, 0, 1, 3, 2, 1, 2, 1]))
def test_empty(self):
s = tT.Solution()
self.assertEqual(0, s.trap([0, 1, 0]))
def test_null(self):
s = tT.Solution()
self.assertEqual(0, s.trap([]))
self.assertEqual(0, s.trap([0]))
self.assertEqual(0, s.trap([1]))
def test_normal_case23(self):
s = tT.Solution()
self.assertEqual(1, s.trap([4, 2, 3]))