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Test::Filename - Portable filename comparison


This documentation describes version 0.02.


   use Test::Filename tests => 2;
   filename_is  ( "some\path", "some/path", "should pass" );
   filename_isnt( "some\path", "some/path", "should fail" );


Many cross-platform test failures -- particularly on Win32 -- are due to hard-coded file paths being used in comparison tests.

   my $file = get_file();     # returns "foo\bar.t";
   is( $file, "foo/bar.t" );  # fails on Win32

This simple module provides some handy functions to convert all those path separators automatically so filename tests will just DWIM.

The alternative is to write your own utility subroutine and use it everywhere or just keep on littering your test code with calls to File::Spec -- yuck!

   is( $file, File::Spec->canonpath("some/path"), "should pass" );

Since this module is so simple, you might not think it worth including as a build_requires dependency. After all, it's not that hard to always remember to use File::Spec, right? But odds are that, at some point, you'll be so busy writing tests that you'll forget and hard-code a path in your haste to show what a clever programmer you are.

So just use this module and stop worrying about it. You'll be happier and so will anyone trying to install your modules on Win32.


Just like Test::More, you have the option of providing a test plan as arguments when you use this module. The following functions are imported by default.



     filename_is  ( $got, $expected, $label );
     filename_isnt( $got, $expected, $label );

These functions work just like is() and isnt() from Test::More, but the first argument will have native path separators converted to forward slashes before comparison. The $expected argument must use unix-style forward slashes as path separators.


Please report any bugs or feature using the CPAN Request Tracker. Bugs can be submitted through the web interface at

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.



David A. Golden (DAGOLDEN)


Copyright (c) 2007 by David A. Golden

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Files produced as output though the use of this software, including generated copies of boilerplate templates provided with this software, shall not be considered Derivative Works, but shall be considered the original work of the Licensor.

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

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