"""test line matching with some failing examples and some which warn

run-test.t only checks positive matches and can not see warnings

(both by design)

"""

import doctest

import os

import re

# this is hack to make sure no escape characters are inserted into the output

if 'TERM' in os.environ:

    del os.environ['TERM']

run_tests = __import__('run-tests')

def prn(ex):

    m = ex.args[0]

    if isinstance(m, str):

        print(m)

    else:

        print(m.decode('utf-8'))

def lm(expected, output):

    r"""check if output matches expected

    does it generally work?

        >>> lm(b'H*e (glob)\n', b'Here\n')

        True

    fail on bad test data

        >>> try: lm(b'a\n',b'a')

        ... except AssertionError as ex: print(ex)

        missing newline

        >>> try: lm(b'single backslash\n', b'single \backslash\n')

        ... except AssertionError as ex: prn(ex)

        single backslash or unknown char

    """

    assert expected.endswith(b'\n') and output.endswith(

        b'\n'

    ), 'missing newline'

    assert not re.search(

        br'[^ \w\\/\r\n()*?]', expected + output

    ), b'single backslash or unknown char'

    test = run_tests.TTest(b'test-run-test.t', b'.', b'.')

    match, exact = test.linematch(expected, output)

    if isinstance(match, str):

        return 'special: ' + match

    elif isinstance(match, bytes):

        return 'special: ' + match.decode('utf-8')

    else:

        return bool(match)  # do not return match object

def wintests():

    r"""test matching like running on windows

    enable windows matching on any os

        >>> _osaltsep = os.altsep

        >>> os.altsep = True

        >>> _osname = os.name

        >>> os.name = 'nt'

        >>> _old_windows = run_tests.WINDOWS

        >>> run_tests.WINDOWS = True

    valid match on windows

        >>> lm(b'g/a*/d (glob)\n', b'g\\abc/d\n')

        True

    direct matching, glob unnecessary

        >>> lm(b'g/b (glob)\n', b'g/b\n')

        'special: -glob'

    missing glob

        >>> lm(b'/g/c/d/fg\n', b'\\g\\c\\d/fg\n')

        True

        >>> lm(b'/g/c/d/fg\n', b'\\g\\c\\d\\fg\r\n')

        True

    restore os.altsep

        >>> os.altsep = _osaltsep

        >>> os.name = _osname

        >>> run_tests.WINDOWS = _old_windows

    """

    pass

def otherostests():

    r"""test matching like running on non-windows os

    disable windows matching on any os

        >>> _osaltsep = os.altsep

        >>> os.altsep = False

        >>> _osname = os.name

        >>> os.name = 'nt'

    backslash does not match slash

        >>> lm(b'h/a* (glob)\n', b'h\\ab\n')

        False

    direct matching glob can not be recognized

        >>> lm(b'h/b (glob)\n', b'h/b\n')

        True

    missing glob can not not be recognized

        >>> lm(b'/h/c/df/g/\n', b'\\h/c\\df/g\\\n')

        False

    restore os.altsep

        >>> os.altsep = _osaltsep

        >>> os.name = _osname

    """

    pass

if __name__ == '__main__':

    doctest.testmod()