def test_Metaline_insert_adjustsindices_beyond_span():
fores = RunLengthList([(0, 'F'), (5, 'B')])
backs = RunLengthList([(0, 'F'), (5, 'B')])
m = Metaline('foobar', fores, backs)
m.insert(3, 'baz')
assert m.fores.items() == [(0, 'F'), (8, 'B')], m.fores.items()
assert m.backs.items() == [(0, 'F'), (8, 'B')], m.backs.items()
def test_Metaline_insert_fg_bg_on_too_long():
fores, backs = RunLengthList([(0, 'foo')]), RunLengthList([(0, 'bar')])
m = Metaline('foo', fores.copy(), backs.copy())
m.insert(2, 'bar')
assert m.fores == fores, m.backs == backs
def test_Metaline_insert_inserts_text():
m = Metaline('foobaz', RunLengthList([(0, None)]),
RunLengthList([(0, None)]))
m.insert(3, 'bar')
assert m.line == 'foobarbaz', m.line
