1HTML::FormHandler::ManuUasle:r:TCeosnttirnigb(u3t)ed PerHlTMDLo:c:uFmoernmtHaatnidolner::Manual::Testing(3)
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NAME

6       HTML::FormHandler::Manual::Testing - testing forms
7

VERSION

9       version 0.40068
10

SYNOPSIS

12       Manual Index
13
14       One of the big advantages of FormHandler compared to many other form
15       packages is that you can test the same form that you use in your
16       controller.
17

DESCRIPTION

19       It's difficult to test forms that are instantiated in controllers with
20       'add_element' calls and from YAML, and that have no form class. It's
21       one of the reasons that 'dynamic' forms generated with a field_list
22       aren't a good idea for anything except the simplest forms. If you have
23       a form class that contains everything that is needed for processing the
24       form, it's really really easy to create tests for forms. Look in the
25       FormHandler 't' directory. It's full of tests for forms.
26
27       You can test that the validations work, that the database is getting
28       updated correctly, even that the HTML that's being rendered is correct.
29       If something isn't working correctly, it's ten times easier to debug in
30       a test case than sitting in a controller somewhere. And when you
31       finally start up your application and use the form, there should be
32       very few surprises.
33
34       FormHandler provides a simple function to test whether the HTML output
35       is correct, 'is_html' in HTML::FormHandler::Test, which uses
36       HTML::TreeBuilder.  If you need to build forms that use the rendering
37       code to produce particular output, it can be helpful.
38

Example

40       Here's an example of a test, originally copied from one of the DBIC
41       model tests.  But you should download the tar.gz or checkout the
42       distribution from github and browse through the tests.
43
44          use Test::More;
45          use lib 't/lib';
46
47          use_ok( 'BookDB::Form::Book');
48          use_ok( 'BookDB::Schema::DB');
49
50          my $schema = BookDB::Schema::DB->connect('dbi:SQLite:t/db/book.db');
51          ok($schema, 'get db schema');
52
53          my $form = BookDB::Form::Book->new(schema => $schema);
54
55          # This is munging up the equivalent of param data from a form
56          my $good = {
57              'title' => 'How to Test Perl Form Processors',
58              'author' => 'I.M. Author',
59              'genres' => [2, 4],
60              'format'       => 2,
61              'isbn'   => '123-02345-0502-2' ,
62              'publisher' => 'EreWhon Publishing',
63          };
64          ok( $form->process( params => $good ), 'Good data' );
65
66          my $book = $form->item;
67          END { $book->delete };
68          ok ($book, 'get book object from form');
69          my $num_genres = $book->genres->count;
70          is( $num_genres, 2, 'multiple select list updated ok');
71          is( $form->field('format')->value, 2, 'get value for format' );
72
73          my $bad_1 = {
74              notitle => 'not req',
75              silly_field   => 4,
76          };
77          ok( !$form->process( $bad_1 ), 'bad 1' );
78
79          my $bad_2 = {
80              'title' => "Another Silly Test Book",
81              'author' => "C. Foolish",
82              'year' => '1590',
83              'pages' => 'too few',
84              'format' => '22',
85          };
86          ok( !$form->process( $bad_2 ), 'bad 2');
87          ok( $form->field('year')->has_errors, 'year has error' );
88          ok( $form->field('pages')->has_errors, 'pages has error' );
89          ok( !$form->field('author')->has_errors, 'author has no error' );
90          ok( $form->field('format')->has_errors, 'format has error' );
91
92          my $good = {
93             title => "Another Silly Test Book",
94             author => "C. Foolish",
95             year => 1999,
96             pages => 101,
97             format => 2
98          };
99          ok( $form->process($good), 'now form validates' );
100
101          done_testing;
102

AUTHOR

104       FormHandler Contributors - see HTML::FormHandler
105

107       This software is copyright (c) 2017 by Gerda Shank.
108
109       This is free software; you can redistribute it and/or modify it under
110       the same terms as the Perl 5 programming language system itself.
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114perl v5.32.0                      2020-07-H2T8ML::FormHandler::Manual::Testing(3)
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