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
