def test_finish(self):
buf = MutableStringBuffer(4)
buf.setzeros(0, 4)
pytest.raises(ValueError, "buf.as_str()")
s = buf.finish()
assert s == '\x00' * 4
pytest.raises(ValueError, "buf.finish()")
def test_setzeros(self):
buf = MutableStringBuffer(8)
buf.setslice(0, 'ABCDEFGH')
buf.setzeros(2, 3)
assert buf.finish() == 'AB\x00\x00\x00FGH'
def test_setslice(self):
buf = MutableStringBuffer(6)
buf.setzeros(0, 6)
buf.setslice(2, 'ABCD')
assert buf.finish() == '\x00\x00ABCD'