portable filename comparison

 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
 .
 Test::Filename 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 dependency. After all, it's not that hard to always remember to
 use File::Spec, Path::Tiny or some other file utility, 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.