1Test2::Manual::Tooling:U:sPelrugCionn:t:rTiebsuttTEeexdsittP2(e:3r:)lMaDnoucaulm:e:nTtoaotliionng::Plugin::TestExit(3)
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NAME

6       Test2::Manual::Tooling::Plugin::TestExit - How to safely add pre-exit
7       behaviors.
8

DESCRIPTION

10       This describes the correct/safe way to add pre-exit behaviors to tests
11       via a custom plugin.
12
13       The naive way to attempt this would be to add an "END { ... }" block.
14       That can work, and may not cause problems.... On the other hand there
15       are a lot of ways that can bite you. Describing all the potential
16       problems of an END block, and how it might conflict with Test2 (Which
17       has its own END block) is beyond the scope of this document.
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COMPLETE CODE UP FRONT

20           package Test2::Plugin::MyPlugin;
21
22           use Test2::API qw{test2_add_callback_exit};
23
24           sub import {
25               my $class = shift;
26
27               test2_add_callback_exit(sub {
28                   my ($ctx, $orig_code, $new_exit_code_ref) = @_;
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30                   return if $orig_code == 42;
31
32                   $$new_exit_code_ref = 42;
33               });
34           }
35
36           1;
37

LINE BY LINE

39       use Test2::API qw{test2_add_callback_exit};
40           This imports the "(test2_add_callback_exit)" callback.
41
42       test2_add_callback_exit(sub { ... });
43           This adds our callback to be called before exiting.
44
45       my ($ctx, $orig_code, $new_exit_code_ref) = @_
46           The callback gets 3 arguments. First is a context object you may
47           use. The second is the original exit code of the "END" block Test2
48           is using. The third argument is a scalar reference which you may
49           use to get the current exit code, or set a new one.
50
51       return if $orig_code == 42
52           This is a short-cut to do nothing if the original exit code was
53           already 42.
54
55       $$new_exit_code_ref = 42
56           This changes the exit code to 42.
57

SEE ALSO

59       Test2::Manual - Primary index of the manual.
60

SOURCE

62       The source code repository for Test2-Manual can be found at
63       https://github.com/Test-More/Test2-Suite/.
64

MAINTAINERS

66       Chad Granum <exodist@cpan.org>
67

AUTHORS

69       Chad Granum <exodist@cpan.org>
70

72       Copyright 2018 Chad Granum <exodist@cpan.org>.
73
74       This program is free software; you can redistribute it and/or modify it
75       under the same terms as Perl itself.
76
77       See http://dev.perl.org/licenses/
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81perl v5.30.1                      20T2e0s-t021:-:3M1anual::Tooling::Plugin::TestExit(3)
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