phpman > perldoc > Test::Unit::Assertion::Regexp(3pm)

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

SYNOPSIS
        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.

IMPLEMENTS
    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.

DESCRIPTION
    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...

AUTHOR
    Copyright (c) 2001 Piers Cawley <pdcawley AT 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.

SEE ALSO
    *   Test::Unit::TestCase

    *   Test::Unit::Assertion