in reply to Error: Can't locate Test/Exception.pm in @INC (you may need to install the Test::Exception module) on CPANPLUS

I am impressed that this module is not installed

You should add it as a dependency to your Makefile.PL, as you should with all your dependencies (see ExtUtils::MakeMaker):

use ExtUtils::MakeMaker 6.64;
WriteMakefile(
    ...
    PREREQ_PM => {
         # your module's runtime dependencies
    },
    TEST_REQUIRES => {
        'Test::Exception' => 0,
    },
);

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I assumed that by default this is a core module and it would be installed by default but I guess I was wrong.

It is not a core module, as you can check with corelist:

$ corelist "/Test::Exception/"
/Test::Exception/  has no match in CORE (or so I think)

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Does any one know any other way of testing croak?

Personally I use Test::Fatal, but I think Test::Exception is a good choice too.

use Test::More;
use Test::Fatal 'exception';
like exception {
   die "Blam";
}, qr/\bBlam\b/, 'exception is as expected';

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Re^2: Error: Can't locate Test/Exception.pm in @INC (you may need to install the Test::Exception module) on CPANPLUS
by thanos1983 (Parson) on Sep 27, 2017 at 09:20 UTC

    Hello haukex,

    Thanks for the complete analysis and solution to my problem.

    I kept looking online and I found also that most people also propose to use Test::Fatal I will give it a try. Thanks again on showing me how to include it on my Makefile.PL I completely forgot about that, since the last module that I wrote was almost 4 years ago.

    On the mean time, I was experimenting and I also found a successful way of testing croak without the use of any secondary test module but with the use of Test::More/like (fellow monk toolic proposed this on Testing error handling that calls "die"), sample below:

    $@ = '';
eval { hexDumperOutput('Test', '這是一個測試') };
like( $@, qr/Unknown encoding format 'Test'/,
      'Check encoding formats hexDumperOutput' );

    Again thanks a lot for your time and effort, it helped me a lot.

    Seeking for Perl wisdom...on the process of learning...not there...yet!
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      like( $@, qr/Unknown encoding format 'Test'/,

      Yes, despite some long-standing issues with $@, since this code is explicitly checking for a specific value, that should work ok too, without any extra modules. Test::Fatal uses Try::Tiny internally, which works around some of the issues with $@. Three of my four CPAN modules use Test::Fatal extensively for testing with no problems across all of CPAN Testers.

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[d/l]
      testing croak without the use of any secondary test module

      I realized the other day that since all I was using from Test::Fatal was its exception function, I could successfully replace it with the following, with no changes to my tests necessary. However, this still theoretically suffers from the same problems I linked to earlier.

      sub exception (&) {
    return eval { shift->(); 1 } ? undef
        : ($@ || confess "\$@ was false");
}

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