def test_that_end_of_file_parser_parsers_multiple_times(n):
parser = reduce(
lambda accu, _: chain(accu, end_of_file()),
range(0, n),
unit(True),
)
assert run_parser(chain(parser, unit(True)), "")
def test_choice_can_be_chained_1000_times(runner):
c = choice(
literal('a'),
literal('b'),
)
p = unit('')
for i in range(0, 1000):
p = bind(
p,
lambda x: c,
)
assert runner(p, 'a' * 999 + 'b').value == 'b'
def test_that_end_of_file_parser_does_only_accept_empty_input(data):
if data:
with pytest.raises(ParsingFailed):
run_parser(
end_of_file(),
data,
)
else:
assert run_parser(
chain(end_of_file(), unit(True)),
data,
)
def wrapper(document):
parser = unit(True)
for character in document:
parser = chain(parser, literal(character))
return parser
def test_that_unit_parser_returns_complete_input_string_as_not_consumed(
text,
runner,
):
parser = unit(True)
assert runner(parser, text).remaining_input == text
def test_that_unit_returns_char_given_to_unit(runner, char, text):
assert runner(unit(char), text).value == char
def test_that_end_of_file_parser_accepts_empty_input():
assert run_parser(
chain(end_of_file(), unit(True)),
"",
)