I think that something like this can be useful when packing distros. I end-up with mixed eol (not in the same file) most of the time:
use Test::EOL; eol('lib/Foo/Bar.pm', 'LF'); eol('lib/Foo/Bar.pm', 'Unix'); eol_is_mixed('lib/Foo/Bar.pm'); eol_is_mixed('lib/Foo/Bar.pm', [qw/ LF CRLF /]); eol_isnt_mixed('lib/Foo/Bar.pm'); all_eol('Unix'); all_eol_isnt_mixed(); # etc. (in case I missed it) is there a module to run this kind of tests?