def test_single(self):
self.assertEqual(max_rect([2]), 2)
def test_with_gaps(self):
self.assertEqual(max_rect([0, 1, 2, 0, 2, 3, 0, 0, 0]), 4)
def test_steps(self):
self.assertEqual(max_rect([1, 2, 2.9]), 4)
def test_example(self):
self.assertEqual(max_rect([2, 4, 2, 1]), 6)
def test_0(self):
self.assertEqual(max_rect([2, 0]), 2)