Test2::Tools::Tester(3pm) Perl Programmers Reference Guide Test2::Tools::Tester(3pm)

# [NAME](#NAME)

Test2::Tools::Tester - Tools to help you test other testing tools.

# [DESCRIPTION](#DESCRIPTION)

This is a collection of tools that are useful when testing other test tools.

# [SYNOPSIS](#SYNOPSIS)

```
    use Test2::Tools::Tester qw/event_groups filter_events facets/;
    use Test2::Tools::Basic qw/plan pass ok/;
    use Test2::Tools::Compare qw/is like/;
    my $events = intercept {
        plan 11;
        pass('pass');
        ok(1, 'pass');
        is(1, 1, "pass");
        like(1, 1, "pass");
    };
    # Grab events generated by tools in Test2::Tools::Basic
    my $basic = filter $events => 'Test2::Tools::Basic';
    # Grab events generated by Test2::Tools::Basic;
    my $compare = filter $events => 'Test2::Tools::Compare';
    # Grab events generated by tools named 'ok'.
    my $oks = filter $events => qr/.*::ok$/;
    my $grouped = group_events $events;
    # Breaks events into this structure:
    {
        '__NA__' => [ ... ],
        'Test2::Tools::Basic' => {
            '__ALL__' => [ $events->[0], $events->[1], $events->[2] ],
            plan => [ $events->[0] ],
            pass => [ $events->[1] ],
            ok => [ $events->[2] ],
        },
        Test2::Tools::Compare => { ... },
    }
    # Get an arrayref of all the assert facets from the list of events.
    my $assert_facets = facets assert => $events;
    # [
    #   bless({ details => 'pass', pass => 1}, 'Test2::EventFacet::Assert'),
    #   bless({ details => 'pass', pass => 1}, 'Test2::EventFacet::Assert'),
    # ]
    # Same, but for info facets
    my $info_facets = facets info => $events;
```

# [EXPORTS](#EXPORTS)

No subs are exported by default.

$array\_ref = filter $events => $PACKAGE

$array\_ref = filter $events => $PACKAGE1, $PACKAGE2

$array\_ref = filter $events => qr/match/

$array\_ref = filter $events => qr/match/, $PACKAGE

This function takes an arrayref of events as the first argument. All additional arguments must either be a package name, or a regex. Any event that is generated by a tool in any of the package, or by a tool that matches any of the regexes, will be returned in an arrayref.

$grouped = group\_events($events)

This function iterates all the events in the argument arrayref and splits them into groups. The resulting data structure is:

```
    { PACKAGE => { SUBNAME => [ $EVENT1, $EVENT2, ... }}
    
```

If the package of an event is not known it will be put into and arrayref under the '\_\_NA\_\_' key at the root of the structure. If a sub name is not known it will typically go under the '\_\_ANON\_\_' key in under the package name.

In addition there is an '\_\_ALL\_\_' key under each package which stores all of the events sorted into that group.

A more complete example:

```
    {
        '__NA__' => [ $event->[3] ],
        'Test2::Tools::Basic' => {
            '__ALL__' => [ $events->[0], $events->[1], $events->[2] ],
            plan => [ $events->[0] ],
            pass => [ $events->[1] ],
            ok => [ $events->[2] ],
        },
    }
    
```

$arrayref = facets TYPE => $events

This function will compile a list of all facets of the specified type that are found in the arrayref of events. If the facet has a "Test2::EventFacet::TYPE" package available then the facet will be constructed into an instance of the class, otherwise it is left as a hashref. Facet Order is preserved.

```
    my $assert_facets = facets assert => $events;
    # [
    #   bless({ details => 'pass', pass => 1}, 'Test2::EventFacet::Assert'),
    #   bless({ details => 'pass', pass => 1}, 'Test2::EventFacet::Assert'),
    # ]
    
```

# [SOURCE](#SOURCE)

The source code repository for Test2-Suite can be found at *https://github.com/Test-More/test-more/*.

# [MAINTAINERS](#MAINTAINERS)

[Chad Granum <exodist@cpan.org>](#Chad)

# [AUTHORS](#AUTHORS)

[Chad Granum <exodist@cpan.org>](#Chad~2)

# [COPYRIGHT](#COPYRIGHT)

Copyright Chad Granum <exodist@cpan.org>.

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

See *http://dev.perl.org/licenses/*

2026-08-31 perl v5.44.0

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Document: Test2::Tools::Tester(3pm) from perl 5.44.0-r1 (Chainguard OS)
Source: https://github.com/Perl/perl5.git