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Test2::Manual::ToolingUseruContributed:PerluDl::Tooling::Plugin::ToolStarts(3)

NAME
       Test2::Manual::Tooling::Plugin::ToolStarts - How	to add behaviors that
       occur when a tool starts	work.

DESCRIPTION
       This tutorial will help you write plugins that have behavior when a
       tool starts. All	tools should start by acquiring	a context object. This
       tutorial	shows you the hooks you	can use	to take	advantage of the
       context acquisition.

COMPLETE CODE UP FRONT
	   package Test2::Plugin::MyPlugin;

	   use Test2::API qw{
	       test2_add_callback_context_init
	       test2_add_callback_context_acquire
	   };

	   sub import {
	       my $class = shift;

	       # Let us	know every time	a tool requests	a context, and give us a
	       # chance	to modify the parameters before	we find	it.
	       test2_add_callback_context_acquire(sub {
		   my $params_ref = shift;

		   print "A tool has requested the context\n";
	       });

	       # Callback every	time a new context is created, not called if an
	       # existing context is found.
	       test2_add_callback_context_init(sub {
		   my $ctx_ref = shift;

		   print "A new	context	was created\n";
	       });
	   }

	   1;

LINE BY	LINE
       use Test2::API qw{test2_add_callback_context_init
       test2_add_callback_context_acquire};
	   This	imports	the "test2_add_callback_context_init()"	and
	   "test2_add_callback_context_acquire()" callbacks.

       test2_add_callback_context_acquire(sub {	... })
	   This	is where we add	our callback for context acquisition. Every
	   time	"Test2::API::context()"	is called the callback will be run.

       my $params_ref =	shift
	   In the test2_add_callback_context_acquire() callbacks we get
	   exactly 1 argument, a reference to the parameters that "context()"
	   will	use to find the	context.

       print "A	tool has requested the context\n"
	   Print a notification	whenever a tool	asks for a context.

       test2_add_callback_context_init(sub { ... })
	   Add our context init	callback. These	callbacks are triggered
	   whenever a completely new context is	created. This is not called if
	   an existing context is found. In short this only fires off for the
	   top level tool, not nested tools.

       my $ctx_ref = shift
	   The coderefs	for test2_add_callback_context_init() will receive
	   exactly 1 argument, the newly created context.

       print "A	new context was	created\n"
	   Print a notification	whenever a new context is created.

SEE ALSO
       Test2::Manual - Primary index of	the manual.

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

MAINTAINERS
       Chad Granum <exodist@cpan.org>

AUTHORS
       Chad Granum <exodist@cpan.org>

COPYRIGHT
       Copyright 2018 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/

perl v5.32.1			 Test2::Manual::Tooling::Plugin::ToolStarts(3)
NAME | DESCRIPTION | COMPLETE CODE UP FRONT | LINE BY LINE | SEE ALSO | SOURCE | MAINTAINERS | AUTHORS | COPYRIGHT

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