Test::MixedScripts - test text for mixed and potentially confusable Unicode scripts

use Test::V0;
use Test::MixedScripts v0.3.0 qw( all_perl_files_scripts_ok file_scripts_ok );

all_perl_files_scripts_ok();

file_scripts_ok( 'assets/site.js' );

done_testing;

This is a module to test that Perl code and other text files do not have potentially malicious or confusing Unicode combinations.

For example, the text for the domain names "оnе.example.com" and "one.example.com" look indistinguishable in many fonts, but the first one has Cyrillic letters. If your software interacted with a service on the second domain, then someone can operate a service on the first domain and attempt to fool developers into using their domain instead.

This might be through a malicious patch submission, or even text from an email or web page that they have convinced a developer to copy and paste into their code.

Changes for version v0.6.3 (2025-08-03)

• Documentation
  • Added SUPPORT section and merged BUGS into it.
  • README is now generated by Dist::Zilla::Plugin::UsefulReadme.
  • Refer users to CONTRIBUTING.md.
• Toolchain
  • Fixed Dist::Zilla configuration.

See the Changes file for more details.

This module lists the following modules as runtime dependencies:

• Carp
• Exporter version 5.57 or later
• File::Basename
• File::Spec
• IO
• List::Util
• Test2::API version 1.302200 or later
• Test2::Util::DistFiles version v0.2.0 or later
• Unicode::UCD
• perl version v5.16.0 or later
• utf8
• warnings

See the cpanfile file for the full list of prerequisites.

The latest version of this module (along with any dependencies) can be installed from CPAN with the cpan tool that is included with Perl:

cpan Test::MixedScripts

You can also extract the distribution archive and install this module (along with any dependencies):

cpan .

You can also install this module manually using the following commands:

perl Makefile.PL
make
make test
make install

If you are working with the source repository, then it may not have a Makefile.PL file. But you can use the Dist::Zilla tool in anger to build and install this module:

dzil build
dzil test
dzil install --install-command="cpan ."

For more information, see the INSTALL file included with this distribution.

Only the latest version of this module will be supported.

This module requires Perl v5.16 or later. Future releases may only support Perl versions released in the last ten years.

Please report any bugs or feature requests on the bugtracker website https://github.com/robrwo/perl-Test-MixedScripts/issues

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

If the bug you are reporting has security implications which make it inappropriate to send to a public issue tracker, then see SECURITY.md for instructions how to report security vulnerabilities.

The development version is on github at https://github.com/robrwo/perl-Test-MixedScripts and may be cloned from git://github.com/robrwo/perl-Test-MixedScripts.git

See CONTRIBUTING.md for more information.

Robert Rothenberg rrwo@cpan.org

This software is copyright (c) 2025 by Robert Rothenberg.

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

Test::PureASCII tests that only ASCII characters are used.

Unicode::Confuse identifies Unicode Confusables.

Unicode::Security implements several security mechanisms described in Unicode Security Mechanisms.

Detecting malicious Unicode