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.\" ========================================================================
.\"
.IX Title "Test::Object 3pm"
.TH Test::Object 3pm "2006-09-07" "perl v5.18.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
Test::Object \- Thoroughly testing objects via registered handlers
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 3
\&  ###################################################################
\&  # In your test module, register test handlers again class names   #
\&  ###################################################################
\&  
\&  package My::ModuleTester;
\&  
\&  use Test::More;
\&  use Test::Object;
\&  
\&  # Foo::Bar is a subclass of Foo
\&  Test::Object\->register(
\&        class => \*(AqFoo\*(Aq,
\&        tests => 5,
\&        code  => \e&foo_ok,
\&        );
\&  Test::Object\->register(
\&        class => \*(AqFoo::Bar\*(Aq,
\&        # No fixed number of tests
\&        code  => \e&foobar_ok,
\&        );
\&  
\&  sub foo_ok {
\&        my $object = shift;
\&        ok( $object\->foo, \*(Aq\->foo returns true\*(Aq );
\&  }
\&  
\&  sub foobar_ok {
\&        my $object = shift;
\&        is( $object\->foo, \*(Aqbar\*(Aq, \*(Aq\->foo returns "bar"\*(Aq );
\&  }
\&  
\&  1;
\&  
\&  
\&  
\&  ###################################################################
\&  # In test script, test object against all registered classes      #
\&  ###################################################################
\&  
\&  #!/usr/bin/perl \-w
\&  
\&  use Test::More \*(Aqno_plan\*(Aq;
\&  use Test::Object;
\&  use My::ModuleTester;
\&  
\&  my $object = Foo::Bar\->new;
\&  isa_ok( $object, \*(AqFoo::Bar\*(Aq );
\&  object_ok( $object );
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
In situations where you have deep trees of classes, there is a common
situation in which you test a module 4 or 5 subclasses down, which should
follow the correct behaviour of not just the subclass, but of all the
parent classes.
.PP
This should be done to ensure that the implementation of a subclass has
not somehow \*(L"broken\*(R" the object's behaviour in a more general sense.
.PP
\&\f(CW\*(C`Test::Object\*(C'\fR is a testing package designed to allow you to easily test
what you believe is a valid object against the expected behaviour of \fBall\fR
of the classes in its inheritance tree in one single call.
.PP
To do this, you \*(L"register\*(R" tests (in the form of \s-1CODE\s0 or function
references) with \f(CW\*(C`Test::Object\*(C'\fR, with each test associated with a
particular class.
.PP
When you call \f(CW\*(C`object_ok\*(C'\fR in your test script, \f(CW\*(C`Test::Object\*(C'\fR will check
the object against all registered tests. For each class that your object
responds to \f(CW\*(C`$object\->isa($class)\*(C'\fR for, the appropriate testing
function will be called.
.PP
Doing it this way allows adapter objects and other things that respond
to \f(CW\*(C`isa\*(C'\fR differently that the default to still be tested against the
classes that it is advertising itself as correctly.
.PP
This also means that more than one test might be \*(L"counted\*(R" for each call
to \f(CW\*(C`object_ok\*(C'\fR. You should account for this correctly in your expected
test count.
.SH "SUPPORT"
.IX Header "SUPPORT"
Bugs should be submitted via the \s-1CPAN\s0 bug tracker, located at
.PP
<http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Test\-Object>
.PP
For other issues, contact the author.
.SH "AUTHOR"
.IX Header "AUTHOR"
Adam Kennedy <cpan@ali.as>
.SH "SEE ALSO"
.IX Header "SEE ALSO"
<http://ali.as/>, Test::More, Test::Builder::Tester, Test::Class
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2005, 2006 Adam Kennedy. All rights reserved.
.PP
This program is free software; you can redistribute
it and/or modify it under the same terms as Perl itself.
.PP
The full text of the license can be found in the
\&\s-1LICENSE\s0 file included with this module.