def test_history(self):
hist = History(3)
for i in range(6):
hist.add(i)
self.assertEqual([3, 4, 5], list(hist))
hist.back()
self.assertEqual(4, hist.current())
self.assertEqual([3, 4], list(hist._left()))
self.assertEqual(5, hist.top())
hist.back()
self.assertEqual(3, hist.current())
self.assertEqual([3], list(hist._left()))
# no change if current == bottom
self.assertEqual(hist.current(), hist.bottom())
last = hist.current()
hist.back()
self.assertEqual(hist.current(), last)
self.assertEqual(5, hist.top())
hist.forward()
hist.forward()
self.assertEqual(5, hist.current())
self.assertEqual([3, 4, 5], list(hist._left()))
self.assertEqual(3, hist.bottom())
hist.add(6)
self.assertEqual(4, hist.bottom())
self.assertEqual([4, 5, 6], list(hist._left()))
hist.back()
hist.fast_forward()
self.assertEqual([4, 5, 6], list(hist._left()))
hist.back()
hist.back()
hist.fast_forward()
self.assertEqual([4, 5, 6], list(hist._left()))
hist.back()
hist.back()
hist.back()
hist.fast_forward()
self.assertEqual([4, 5, 6], list(hist._left()))
hist.back()
hist.back()
hist.back()
hist.back()
hist.fast_forward()
self.assertEqual([4, 5, 6], list(hist._left()))
def test_history(self): hist = History(3) for i in range(6): hist.add(i) self.assertEqual([3,4,5], list(hist)) hist.back() self.assertEqual(4, hist.current()) self.assertEqual([3,4], list(hist._left())) self.assertEqual(5, hist.top()) hist.back() self.assertEqual(3, hist.current()) self.assertEqual([3], list(hist._left())) # no change if current == bottom self.assertEqual(hist.current(), hist.bottom()) last = hist.current() hist.back() self.assertEqual(hist.current(), last) self.assertEqual(5, hist.top()) hist.forward() hist.forward() self.assertEqual(5, hist.current()) self.assertEqual([3,4,5], list(hist._left())) self.assertEqual(3, hist.bottom()) hist.add(6) self.assertEqual(4, hist.bottom()) self.assertEqual([4,5,6], list(hist._left())) hist.back() hist.fast_forward() self.assertEqual([4,5,6], list(hist._left())) hist.back() hist.back() hist.fast_forward() self.assertEqual([4,5,6], list(hist._left())) hist.back() hist.back() hist.back() hist.fast_forward() self.assertEqual([4,5,6], list(hist._left())) hist.back() hist.back() hist.back() hist.back() hist.fast_forward() self.assertEqual([4,5,6], list(hist._left()))
