def test_get_lines(self):
SRC = SourceString('hello\nworld\nthis\nis\na\ntest')
lines = [str(x) for x in SRC.get_lines(1, 2)]
assert lines == ['1 |hello\n', '2 |world\n']
lines = ''.join([repr(x) for x in SRC.get_lines(0, 2)])
assert lines == 'hello\nworld\n'
lines = [str(x) for x in SRC.get_lines(5, 6)]
assert lines == ['5 |a\n', '6 |test']
lines = ''.join([repr(x) for x in SRC.get_lines(5, 6)])
assert lines == 'a\ntest'
assert SRC.get_lines(10, 20) == None
