def _assert_string(self, separator, expecteds, streams=STREAMS_3):
with separator:
parser = And(Optional('a') & Optional('b') & 'c', Eos())
ok = True
parser.config.no_full_first_match()
for (stream, expected) in zip(streams, expecteds):
parsed = parser.parse_string(stream) is not None
if PRINT:
print('{0!r:9} : {1!r:5} {2!r:5}'
.format(stream, parsed, parsed == expected))
ok = ok and (parsed == expected)
assert ok
