def test_move_back_first_element(self):
paragraph = [
'A:\n', ' E:\n', ' C: Cc\n', ' D: Dd\n',
' B: Bb\n'
]
line = Line('A:\n', paragraph)
with self.assertRaises(IndexError):
line.move_back()
def test_simple(self):
paragraph = [
'A:\n', ' E:\n', ' C: Cc\n', ' D: Dd\n',
' B: Bb\n'
]
line = Line(' B: Bb\n', paragraph)
line.move_back()
self.assertEqual(paragraph, [
'A:\n', ' E:\n', ' C: Cc\n', ' B: Bb\n',
' D: Dd\n'
])