def test_left_arrow_at_non_zero(self):
for i in range(1, len(self._line)):
expected = (i - 1, self._line)
result = left_arrow(i, self._line)
self.assertEqual(expected, result)
def test_left_arrow_at_non_zero(self):
for i in range(1, len(self._line)):
expected = (i-1, self._line)
result = left_arrow(i, self._line)
self.assertEqual(expected, result)
def test_left_arrow_at_zero(self):
pos = 0
expected = (pos, self._line)
result = left_arrow(pos, self._line)
self.assertEqual(expected, result)
def test_left_arrow_at_zero(self):
pos = 0
expected = (pos, self._line)
result = left_arrow(pos, self._line)
self.assertEqual(expected, result)
