NAME

Test::Stream::HashBase - Base class for classes that use a hashref of a hash.

EXPERIMENTAL CODE WARNING

This is an experimental release! Test-Stream, and all its components are still in an experimental phase. This dist has been released to cpan in order to allow testers and early adopters the chance to write experimental new tools with it, or to add experimental support for it into old tools.

PLEASE DO NOT COMPLETELY CONVERT OLD TOOLS YET. This experimental release is very likely to see a lot of code churn. API's may break at any time. Test-Stream should NOT be depended on by any toolchain level tools until the experimental phase is over.

SYNOPSIS

A class:

    package My::Class;
    use strict;
    use warnings;

    use Test::Stream::HashBase accessors => [qw/foo bar baz/];

    # Chance to initialize defaults
    sub init {
        my $self = shift;    # No other args
        $self->{+FOO} ||= "foo";
        $self->{+BAR} ||= "bar";
        $self->{+BAZ} ||= "baz";
    }

    sub print {
        print join ", " => map { $self->{$_} } FOO, BAR, BAZ;
    }

Subclass it

    package My::Subclass;
    use strict;
    use warnings;
    use Test::Stream::HashBase base => 'My::Class',    # subclass
                          accessors => ['bat'];

    sub init {
        my $self = shift;

        # We get the constants from the base class for free.
        $self->{+FOO} ||= 'SubFoo';
        $self->{+BAT} || = 'bat';

        $self->SUPER::init();
    }

use it:

    package main;
    use strict;
    use warnings;
    use My::Class;

    my $one = My::Class->new(foo => 'MyFoo', bar => 'MyBar');

    # Accessors!
    my $foo = $one->foo;    # 'MyFoo'
    my $bar = $one->bar;    # 'MyBar'
    my $baz = $one->baz;    # Defaulted to: 'baz'

    # Setters!
    $one->set_foo('A Foo');
    $one->set_bar('A Bar');
    $one->set_baz('A Baz');


    $one->{+FOO} = 'xxx';

DESCRIPTION

This package is used to generate classes based on hashrefs. Using this class will give you a new() method, as well as generating accessors you request. Generated accessors will be getters, set_ACCESSOR setters will also be generated for you. You also get constants for each accessor (all caps) which return the key into the hash for that accessor. Single inheritence is also supported.

IMPORT ARGUMENTS

accessors => [...]

This is how you define your accessors. See the ACCESSORS section below.

base => $class

This is how you subclass a Test::Stream::Hashbase class. This will give you all the constants of the parent(s).

into => $class

This is a way to apply HashBase to another class.

    package My::Thing;

    sub import {
        my $caller = caller;
        Test::Stream::HashBase->import(@_, into => $class);
        ...
    }

METHODS

PROVIDED BY HASH BASE

$it = $class->new(@VALUES)

Create a new instance using key/value pairs.

HOOKS

$self->init()

This gives you the chance to set some default values to your fields. The only argument is $self with its indexes already set from the constructor.

ACCESSORS

To generate accessors you list them when using the module:

    use Test::Stream::HashBase accessors => [qw/foo/];

This will generate the following subs in your namespace:

foo()

Getter, used to get the value of the foo field.

set_foo()

Setter, used to set the value of the foo field.

FOO()

Constant, returs the field foo's key into the class hashref. Subclasses will also get this function as a constant, not simply a method, that means it is copied into the subclass namespace.

The main reason for using these constants is to help avoid spelling mistakes and similar typos. It will not help you if you forget to prefix the '+' though.

SUBCLASSING

You can subclass an existing HashBase class.

    use Test::Stream::HashBase
        base      => 'Another::HashBase::Class',
        accessors => [qw/foo bar baz/];

The base class is added to @ISA for you, and all constants from base classes are added to subclasses automatically.

SOURCE

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

MAINTAINERS

Chad Granum <exodist@cpan.org>

AUTHORS

Chad Granum <exodist@cpan.org>

COPYRIGHT

Copyright 2015 Chad Granum <exodist7@gmail.com>.

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

See http://www.perl.com/perl/misc/Artistic.html

cpanm Test::Stream

perl -MCPAN -e shell
install Test::Stream