Gregor Goldbach
and 1 contributors

NAME

Test::BOM - Test strings and files for BOM

VERSION

version 0.001

SYNOPSIS

    use Test::More;
    use Test::BOM

    string_has_bom("\x00\x00\xfe\xff");
    string_hasnt_bom("blargh");

    file_has_bom('t/data/foo');
    file_hasnt_bom('t/data/bar');

DESCRIPTION

This module helps you with testing for byte-order-marks in strings and files.

If you came across this module while looking for other ways to deal with byte-order-marks you might find what you need in the "SEE ALSO" section below.

If you don't know anything about automated testing in Perl then you should read about Test::More before preceding. This module uses the Test::Builder framework.

Byte-order-marks are by definition to be found at the beginning of any content, so the functions this module provides take a look at the start of either a string or a file. It does this by using functions from String::BOM and basically just wraps them for use with Test::Builder.

By default the following functions are imported into your namespace: string_has_bom, string_hasnt_bom, file_has_bom, file_hasnt_bom.

FUNCTIONS

string_has_bom ($string)

Passes if the string has a BOM, fails if not.

string_hasnt_bom ($string)

Passes if string doesn't have a BOM, fails if it has.

file_has_bom ($filename)

Passes if the file has a BOM, fails if it doesn't.

file_hasnt_bom ($filename)

Passes if the file doesn't have a BOM, fails if it has.

SEE ALSO

There are some distributions that help you dealing with BOMs in different ways:

String::BOM is used by this module to check for BOM.
File::BOM::Utils contains functions to check for, add and remove BOM from files.
File::BOM can be used to actually read from files that have BOMs as seamlessly as possible.
PPI::Token::BOM represents a BOM when using PPI to parse perl.
The distribution Dist::Zilla::Plugin::Web contains the module Dist::Zilla::Plugin::Web::StripBOM that strips BOM from files.

Additional information about BOM and it's usage:

http://www.unicode.org/faq/utf_bom.html#BOM is the FAQ for the BOM from the Unicode Consortium.
https://docs.microsoft.com/de-de/windows/desktop/Intl/using-byte-order-marks explains how Microsoft wants the BOM to be used. Since this document dates from 2018 (as of this writing) it's very likely to get in contact with files containing BOM.

AUTHOR

Gregor Goldbach <glauschwuffel@gmail.com>

COPYRIGHT AND LICENSE

This software is copyright (c) 2018 by Gregor Goldbach.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.