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.\" ========================================================================
.\"
.IX Title "Test2::Tools::Grab 3pm"
.TH Test2::Tools::Grab 3pm "2019-05-06" "perl v5.24.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
Test2::Tools::Grab \- Temporarily intercept all events without adding a scope
level.
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
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.
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&    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 = $grab\->finish;
.Ve
.SH "EXPORTS"
.IX Header "EXPORTS"
.ie n .IP "$grab = \fIgrab()\fR" 4
.el .IP "\f(CW$grab\fR = \fIgrab()\fR" 4
.IX Item "$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.
.Sp
.Vb 3
\&    my $grab = grab();
\&        ok(1, \*(Aqfoo\*(Aq);
\&        ok(0, \*(Aqbar\*(Aq);
\&
\&    my $events = $grab\->finish;
\&
\&    is(@$events, 2, "grabbed 2 events.");
.Ve
.Sp
If the \f(CW$grab\fR object is destroyed without calling \f(CW\*(C`finish()\*(C'\fR, it will
automatically clean up after itself and restore the parent hub.
.Sp
.Vb 5
\&    {
\&        my $grab = grab();
\&        # Things are grabbed
\&    }
\&    # Things are back to normal
.Ve
.Sp
By default the hub used has \f(CW\*(C`no_ending\*(C'\fR 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:
.Sp
.Vb 1
\&    $grab\->hub\->set_no_ending(0);
.Ve
.Sp
With \f(CW\*(C`no_ending\*(C'\fR turned off, \f(CW\*(C`finish\*(C'\fR 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.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Test2::Util::Grabber \- The object constructed and returned by this tool.
.SH "SOURCE"
.IX Header "SOURCE"
The source code repository for Test2 can be found at
\&\fIhttps://github.com/Test\-More/Test2\-Suite/\fR.
.SH "MAINTAINERS"
.IX Header "MAINTAINERS"
.IP "Chad Granum <exodist@cpan.org>" 4
.IX Item "Chad Granum <exodist@cpan.org>"
.SH "AUTHORS"
.IX Header "AUTHORS"
.PD 0
.IP "Chad Granum <exodist@cpan.org>" 4
.IX Item "Chad Granum <exodist@cpan.org>"
.PD
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2018 Chad Granum <exodist@cpan.org>.
.PP
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
.PP
See \fIhttp://dev.perl.org/licenses/\fR