Test::Unit::Assertion::Regexp - Assertion with regex matching

       Copyright (c) 2001 Piers Cawley <pdcawley@iterative-software.com>.

       All rights reserved. This program is free software; you can redistribute it and/or modify it under the
       same terms as Perl itself.

       The class is used by the framework to provide sensible 'automatic' reports when a match fails. The old:

           $self->assert(scalar($foo =~ /pattern/), "$foo didn't match /.../");

       seems rather clumsy compared to this. If the regexp assertion fails, then the user is given a sensible
       error message, with the pattern and the string that failed to match it...

       Test::Unit::Assertion::Regexp implements the Test::Unit::Assertion interface, which means it can be
       plugged into the Test::Unit::TestCase and friends' "assert" method with no ill effects.

       Test::Unit::Assertion::Regexp - Assertion with regex matching

       •   Test::Unit::TestCase

       •   Test::Unit::Assertion

perl v5.38.2                                       2024-07-27                 Test::Unit::Assertion::Regexp(3pm)

           require Test::Unit::Assertion::Regexp;

           my $assert_re =
             Test::Unit::Assertion::Regexp->new(qr/a_pattern/);

           $assert_re->do_assertion('a_string');

       This is rather more detail than the average user will need.  Test::Unit::Assertion::Regexp objects are
       generated automagically by Test::Unit::Assert::assert when it is passed a regular expression as its first
       parameter.

           sub test_foo {
             ...
             $self->assert(qr/some_pattern/, $result);
           }

       If the assertion fails then the object throws an exception with details of the pattern and the string it
       failed to match against.

       Note that if you need to do a 'string does not match this pattern' type of assertion then you can do:

          $self->assert(qr/(?!some_pattern)/, $some_string)

       ie. Make use of the negative lookahead assertion.