http://www.perlmonks.org?node_id=413210


in reply to Test::More usage to test functions that die

One way is to overload croak() inside your test, then make sure that calling your function calls croak() under the right circumstances. E.g.:
# (pseudocode) our $croakcount; sub main::croak { $croakcount++; } myfunc(my $badoptions); is ($croakcount, 1, "myfunc() calls croak()");

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Re^2: Test::More usage to test functions that die
by stvn (Monsignor) on Dec 08, 2004 at 15:21 UTC

    This wont work unless all your code is in main:: (and even then its a delicate situation at best)

    #!/usr/bin/perl sub main::croak { print "I croaked"; } { package Test; use Carp; sub myfunc { croak("I am dying"); } } eval { Test::myfunc(); }; print $@ if $@; *myfunc = \&Test::myfunc; eval { myfunc(); }; print $@ if $@; __OUTPUT__ I am dying at test.pl line 18 I am dying at test.pl line 26
    However, what you are talking about is not unlike the ideas behind MockObjects, see Test::MockObject and Test::MockModule for more info.

    -stvn

      I know that the code as written won't work, which is why I labeled it pseudocode. But thanks for clarifying.

      Yes, this is essentially the MockObject strategy. Thanks for adding the links.