Test2::Tools::Grab(3) Temporarily intercept all events without adding a scope


This package provides a function that returns an object that grabs all events. Once the object is destroyed events will once again be sent to the main hub.


use Test2::Tools::Grab;
my $grab = grab();
# Generate some events, they are intercepted.
ok(1, "pass");
ok(0, "fail");
my $events_a = $grab->flush;
# Generate some more events, they are intercepted.
ok(1, "pass");
ok(0, "fail");
my $events_b = $grab->finish;


$grab = grab()
This lets you intercept all events for a section of code without adding anything to your call stack. This is useful for things that are sensitive to changes in the stack depth.

    my $grab = grab();
        ok(1, 'foo');
        ok(0, 'bar');
    my $events = $grab->finish;
    is(@$events, 2, "grabbed 2 events.");

If the $grab object is destroyed without calling "finish()", it will automatically clean up after itself and restore the parent hub.

        my $grab = grab();
        # Things are grabbed
    # Things are back to normal

By default the hub used has "no_ending" set to true. This will prevent the hub from enforcing that you issued a plan and ran at least 1 test. You can turn enforcement back one like this:


With "no_ending" turned off, "finish" will run the post-test checks to enforce the plan and that tests were run. In many cases this will result in additional events in your events array.


The source code repository for Test2 can be found at http://github.com/Test-More/Test-Stream/.


Chad Granum <[email protected]>


Chad Granum <[email protected]>


Copyright 2016 Chad Granum <[email protected]>.

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/