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124 .\" ========================================================================
126 .IX Title "Test::Object 3"
127 .TH Test::Object 3 "2006-09-07" "perl v5.8.7" "User Contributed Perl Documentation"
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133 Test::Object \- Thoroughly testing objects via registered handlers
135 .IX Header "SYNOPSIS"
137 \& ###################################################################
138 \& # In your test module, register test handlers again class names #
139 \& ###################################################################
141 \& package My::ModuleTester;
146 \& # Foo::Bar is a subclass of Foo
147 \& Test::Object\->register(
148 \& class => \*(AqFoo\*(Aq,
150 \& code => \e&foo_ok,
152 \& Test::Object\->register(
153 \& class => \*(AqFoo::Bar\*(Aq,
154 \& # No fixed number of tests
155 \& code => \e&foobar_ok,
159 \& my $object = shift;
160 \& ok( $object\->foo, \*(Aq\->foo returns true\*(Aq );
164 \& my $object = shift;
165 \& is( $object\->foo, \*(Aqbar\*(Aq, \*(Aq\->foo returns "bar"\*(Aq );
172 \& ###################################################################
173 \& # In test script, test object against all registered classes #
174 \& ###################################################################
176 \& #!/usr/bin/perl \-w
178 \& use Test::More \*(Aqno_plan\*(Aq;
180 \& use My::ModuleTester;
182 \& my $object = Foo::Bar\->new;
183 \& isa_ok( $object, \*(AqFoo::Bar\*(Aq );
184 \& object_ok( $object );
187 .IX Header "DESCRIPTION"
188 In situations where you have deep trees of classes, there is a common
189 situation in which you test a module 4 or 5 subclasses down, which should
190 follow the correct behaviour of not just the subclass, but of all the
193 This should be done to ensure that the implementation of a subclass has
194 not somehow \*(L"broken\*(R" the object's behaviour in a more general sense.
196 \&\f(CW\*(C`Test::Object\*(C'\fR is a testing package designed to allow you to easily test
197 what you believe is a valid object against the expected behaviour of \fBall\fR
198 of the classes in its inheritance tree in one single call.
200 To do this, you \*(L"register\*(R" tests (in the form of \s-1CODE\s0 or function
201 references) with \f(CW\*(C`Test::Object\*(C'\fR, with each test associated with a
204 When you call \f(CW\*(C`object_ok\*(C'\fR in your test script, \f(CW\*(C`Test::Object\*(C'\fR will check
205 the object against all registered tests. For each class that your object
206 responds to \f(CW\*(C`$object\->isa($class)\*(C'\fR for, the appropriate testing
207 function will be called.
209 Doing it this way allows adapter objects and other things that respond
210 to \f(CW\*(C`isa\*(C'\fR differently that the default to still be tested against the
211 classes that it is advertising itself as correctly.
213 This also means that more than one test might be \*(L"counted\*(R" for each call
214 to \f(CW\*(C`object_ok\*(C'\fR. You should account for this correctly in your expected
218 Bugs should be submitted via the \s-1CPAN\s0 bug tracker, located at
220 <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Test\-Object>
222 For other issues, contact the author.
225 Adam Kennedy <cpan@ali.as>
227 .IX Header "SEE ALSO"
228 <http://ali.as/>, Test::More, Test::Builder::Tester, Test::Class
230 .IX Header "COPYRIGHT"
231 Copyright 2005, 2006 Adam Kennedy. All rights reserved.
233 This program is free software; you can redistribute
234 it and/or modify it under the same terms as Perl itself.
236 The full text of the license can be found in the
237 \&\s-1LICENSE\s0 file included with this module.