Dave Rolsky > Test-Class-Moose-0.55-TRIAL > Test::Class::Moose

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Module Version: 0.55   Source   Latest Release: Test-Class-Moose-0.58

NAME ^

Test::Class::Moose - Serious testing for serious Perl

VERSION ^

version 0.55

SYNOPSIS ^

    package TestsFor::DateTime;
    use Test::Class::Moose;
    use DateTime;

    # methods that begin with test_ are test methods.
    sub test_constructor {
        my $test = shift;
        $test->test_report->plan(3);    # strictly optional

        can_ok 'DateTime', 'new';
        my %args = (
            year  => 1967,
            month => 6,
            day   => 20,
        );
        isa_ok my $date = DateTime->new(%args), 'DateTime';
        is $date->year, $args{year}, '... and the year should be correct';
    }

    1;

DESCRIPTION ^

See the Test::Class::Moose home page for a summary.

Test::Class::Moose is a powerful testing framework for Perl. Out of the box you get:

Better docs will come later. You should already know how to use Moose and Test::Class.

BASICS ^

Inheriting from Test::Class::Moose

Just use Test::Class::Moose. That's all. You'll get all Test::Most test functions, too, along with strict and warnings. You can use all Moose behavior, too.

Declare a test method

All method names that begin with test_ are test methods. Methods that do not are not test methods.

 sub test_this_is_a_method {
     my $test = shift;

     $test->this_is_not_a_test_method;
     ok 1, 'whee!';
 }

 sub this_is_not_a_test_method {
    my $test = shift;
    # but you can, of course, call it like normal
 }

You may specify Test and Tests method attributes, just like in Test::Class and the method will automatically be a test method, even if does not start with test_:

    sub this_is_a_test : Test {
        pass 'we have a single test';
    }

    sub another_test_method : Tests { # like "no_plan"
        # a bunch of tests
    }

    sub yet_another_test_method : Tests(7) { # sets plan to 7 tests
        ...
    }

Note: Prior to version 0.51, this feature only worked if you had the optional Sub::Attribute installed.

Plans

No plans needed. The test suite declares a plan of the number of test classes.

Each test class is a subtest declaring a plan of the number of test methods.

Each test method relies on an implicit done_testing call.

If you prefer, you can declare a plan in a test method:

    sub test_something {
        my $test = shift;
        $test->test_report->plan($num_tests);
        ...
    }

Or with a Tests attribute:

    sub test_something : Tests(3) {
        my $test = shift;
        ...
    }

You may call plan() multiple times for a given test method. Each call to plan() will add that number of tests to the plan. For example, with a method modifier:

    before 'test_something' => sub {
        my $test = shift;
        $test->test_report->plan($num_extra_tests);

        # more tests
    };

Please note that if you call plan, the plan will still show up at the end of the subtest run, but you'll get the desired failure if the number of tests run does not match the plan.

Inheriting from another Test::Class::Moose class

List it as the extends in the import list.

 package TestsFor::Some::Class::Subclass;
 use Test::Class::Moose extends => 'TestsFor::Some::Class';

 sub test_me {
     my $test  = shift;
     my $class = $test->test_class;
     ok 1, "I overrode my parent! ($class)";
 }

 before 'test_this_baby' => sub {
     my $test  = shift;
     my $class = $test->test_class;
     pass "This should run before my parent method ($class)";
 };

 sub this_should_not_run {
     my $test = shift;
     fail "We should never see this test";
 }

 sub test_this_should_be_run {
     for ( 1 .. 5 ) {
         pass "This is test number $_ in this method";
     }
 }

 1;

TEST CONTROL METHODS ^

Do not run tests in test control methods. This will cause the test control method to fail (this is a feature, not a bug). If a test control method fails, the class/method will fail and testing for that class should stop.

Every test control method will be called as a method. The invocant is the instance of your test class

The available test control methods are:

test_startup

 sub test_startup {
    my $test = shift;
    $test->next::method;
    # more startup
 }

Runs at the start of each test class. If you need to know the name of the class you're running this in (though usually you shouldn't), use $test->test_class, or you can do this:

    sub test_startup {
        my $test                 = shift;
        my $report               = $test->test_report;
        my $class                = $report->current_class->name;
        my $upcoming_test_method = $report->current_method->name;
        ...
    }

The $test->test_report object is a Test::Class::Moose::Report::Instance object.

test_setup

 sub test_setup {
    my $test = shift;
    $test->next::method;
    # more setup
 }

Runs at the start of each test method. If you must know the name of the test you're about to run, you can do this:

 sub test_setup {
    my $test = shift;
    $test->next::method;
    my $test_method = $test->test_report->current_method->name;
    # do something with it
 }

test_teardown

 sub test_teardown {
    my $test = shift;
    # more teardown
    $test->next::method;
 }

Runs at the end of each test method.

test_shutdown

 sub test_shutdown {
     my $test = shift;
     # more teardown
     $test->next::method;
 }

Runs at the end of each test class.

Overriding Test Control Methods

To override a test control method, just remember that this is OO:

 sub test_setup {
     my $test = shift;
     $test->next::method; # optional to call parent test_setup
     # more setup code here
 }

TEST CLASS INSTANCES ^

This feature is still considered experimental.

By default, each test class you create will be instantiated once. However, you can tell the Test::Class::Moose::Runner to create multiple instances of a test class.

To do this, simply consume the Test::Class::Moose::Role::ParameterizedInstances role in your test class. This role requires you to implement a _constructor_parameter_sets method in your test class. That method will be called as a class method. It is expected to return a list of key/value pairs. The keys are the name of the instance and the values are hashrefs of attributes to be passed to your test class's constructor. Here's a really dumb example:

 package TestsFor::PlainAndFancy;
 use Test::Class::Moose;
 with 'Test::Class::Moose::Role::ParameterizedInstances';

 has is_fancy => (
     is       => 'ro',
     isa      => 'Bool',
     required => 1,
 );

 sub _constructor_parameter_sets {
     my $class = shift;
     return (
         "$class - plain" => { is_fancy => 0 },
         "$class - fancy" => { is_fancy => 1 },
     );
 }

 sub test_something { ... }

The test runner will run all the test methods in your class once per instance, and each instance will be run in its own subtest.

Note that this feature has great potential for abuse, so use it cautiously. That said, there are cases where this feature can greatly simplify your test code.

RUNNING THE TEST SUITE ^

See the docs for Test::Class::Moose::Runner for details on running your test suite. If you'd like to get up and running quickly, here's a very simple test file you can use:

 use Test::Class::Moose::Load 't/lib';
 use Test::Class::Moose::Runner;
 Test::Class::Moose::Runner->new->runtests;

Put this in a file like t/run-test-class.t. When you run it with prove it will load all the test classes defined in t/lib and run them sequentially.

Skipping Classes and Methods

If you wish to skip a class, set the reason in the test_startup method.

    sub test_startup {
        my $test = shift;
        $test->test_skip("I don't want to run this class");
    }

If you wish to skip an individual method, do so in the test_setup method.

    sub test_setup {
        my $test = shift;
        my $test_method = $test->test_report->current_method;

        if ( 'test_time_travel' eq $test_method->name ) {
            $test->test_skip("Time travel not yet available");
        }
    }

The "Tests" and "Test" Attributes

If you're comfortable with Test::Class, you know that test methods methods are declared in Test::Class with Test (for a method with a single test) or Tests, for a method with multiple tests. This also works for Test::Class::Moose. Test methods declared this way do not need to start with test_.

    sub something_we_want_to_check : Test {
        # this method may have only one test
    }

    sub something_else_to_check : Tests {
        # this method may have multiple tests
    }

    sub another_test_method : Tests(3) {
        # this method must have exactly 3 tests
    }

If a test method overrides a parent test method and calls it, their plans will be added together:

    package TestsFor::Parent;

    use Test::Class::Moose;

    sub some_test : Tests(3) {
        # three tests
    }

And later:

    package TestsFor::Child;

    use Test::Class::Moose extends => 'TestsFor::Parent';

    sub some_test : Tests(2) {
        my $test = shift;
        $test->next::method;
        # 2 tests here
    }

In the above example, TestsFor::Parent::some_test will run three tests, but TestsFor::Child::some_test will run five tests (two tests, plus the three from the parent).

Note that if a plan is explicitly declared, any modifiers or overriding methods calling the original method will also have to assert the number of tests to ensure the plan is correct. The above TestsFor::Parent and TestsFor::Child code would fail if the child's some_test method attribute was Tests without the number of tests asserted.

Do not use Test or Tests with test control methods because you don't run tests in those.

Tagging Methods

Sometimes you want to be able to assign metadata to help you better manage your test suite. You can do this with tags:

    sub test_save_poll_data : Tags(api network) {
        ...
    }

Tags are strictly optional and you can provide one or more tags for each test method with a space separated list of tags. You can use this to filter your tests suite, if desired. For example, if your network goes down and all tests which rely on a network are tagged with network, you can skip those tests with this:

    Test::Class::Moose::Runner->new( exclude_tags => 'network' )->runtests;

Or maybe you want to run all api and database tests, but skip those marked deprecated:

    Test::Class::Moose::Runner->new(
        include_tags => [qw/api database/],
        exclude_tags => 'deprecated',
    )->runtests;

You can also inspect tags withing your test classes:

    sub test_setup {
        my $test          = shift;
        my $method_to_run = $test->test_report->current_method;
        if ( $method_to_run->has_tag('db') ) {
            $test->load_database_fixtures;
        }
    }

Tagging support relies on Sub::Attribute. If this module is not available, include_tags and exclude_tags will be ignored, but a warning will be issued if those are seen. Prior to version 0.51, Sub::Attribute was optional. Now it's mandatory, so those features should always work.

THINGS YOU CAN OVERRIDE ^

... but probably shouldn't.

As a general rule, methods beginning with /^test_/ are reserved for Test::Class::Moose. This makes it easier to remember what you can and cannot override. However, any test with Test or Tests are test methods regardless of their names.

test_report

 my $report = $test->test_report;

Returns the Test::Class::Moose::Report object. Useful if you want to do your own reporting and not rely on the default output provided with the statistics boolean option.

You can also call it in test classes (most useful in the test_setup() method):

    sub test_setup {
        my $test = shift;
        $self->next::method;
        my $report= $test->test_report;
        my $class = $test->current_class;
        my $method = $test->current_method; # the test method we're about to run
        if ( $method->name =~ /customer/ ) {
            $test->load_customer_fixture;
        }
        # or better still
        if ( $method->has_tag('customer') ) {
            $test->load_customer_fixture;
        }
    }

test_class

 my $class = $test->test_class;

Returns the name for this test class. Useful if you rebless an object (such as applying a role at runtime) and don't want to lose the original class name.

test_methods

You may override this in a subclass. Currently returns all methods in a test class that start with test_ (except for the test control methods).

Please note that the behavior for include and exclude is also contained in this method. If you override it, you will need to account for those yourself.

import

Sadly, we have an import method. This is used to automatically provide you with all of the Test::Most behavior.

SAMPLE TAP OUTPUT ^

We use nested tests (subtests) at each level:

    1..2
    #
    # Executing tests for TestsFor::Basic::Subclass
    #
        1..3
        # TestsFor::Basic::Subclass->test_me()
            ok 1 - I overrode my parent! (TestsFor::Basic::Subclass)
            1..1
        ok 1 - test_me
        # TestsFor::Basic::Subclass->test_this_baby()
            ok 1 - This should run before my parent method (TestsFor::Basic::Subclass)
            ok 2 - whee! (TestsFor::Basic::Subclass)
            1..2
        ok 2 - test_this_baby
        # TestsFor::Basic::Subclass->test_this_should_be_run()
            ok 1 - This is test number 1 in this method
            ok 2 - This is test number 2 in this method
            ok 3 - This is test number 3 in this method
            ok 4 - This is test number 4 in this method
            ok 5 - This is test number 5 in this method
            1..5
        ok 3 - test_this_should_be_run
    ok 1 - TestsFor::Basic::Subclass
    #
    # Executing tests for TestsFor::Basic
    #
        1..2
        # TestsFor::Basic->test_me()
            ok 1 - test_me() ran (TestsFor::Basic)
            ok 2 - this is another test (TestsFor::Basic)
            1..2
        ok 1 - test_me
        # TestsFor::Basic->test_this_baby()
            ok 1 - whee! (TestsFor::Basic)
            1..1
        ok 2 - test_this_baby
    ok 2 - TestsFor::Basic
    # Test classes:    2
    # Test methods:    5
    # Total tests run: 11
    ok
    All tests successful.
    Files=1, Tests=2,  2 wallclock secs ( 0.03 usr  0.00 sys +  0.27 cusr  0.01 csys =  0.31 CPU)
    Result: PASS

REPORTING ^

See Test::Class::Moose::Report for more detailed information on reporting.

Reporting features are subject to change.

Sometimes you want more information about your test classes, it's time to do some reporting. Maybe you even want some tests for your reporting. If you do that, run the test suite in a subtest (because the plans will otherwise be wrong).

    #!/usr/bin/env perl
    use lib 'lib';
    use Test::Most;
    use Test::Class::Moose::Load qw(t/lib);
    use Test::Class::Moose::Runner;

    my $test_suite = Test::Class::Moose::Runner->new;

    subtest 'run the test suite' => sub {
        $test_suite->runtests;
    };
    my $report = $test_suite->test_report;

    foreach my $class ( $report->all_test_instances ) {
        my $class_name = $class->name;
        ok !$class->is_skipped, "$class_name was not skipped";

        subtest "$class_name methods" => sub {
            foreach my $method ( $class->all_test_methods ) {
                my $method_name = $method->name;
                ok !$method->is_skipped, "$method_name was not skipped";
                cmp_ok $method->num_tests, '>', 0,
                  '... and some tests should have been run';
                diag "Run time for $method_name: ".$method->time->duration;
            }
        };
        my $time   = $class->time;
        diag "Run time for $class_name: ".$class->time->duration;

        my $real   = $time->real;
        my $user   = $time->user;
        my $system = $time->system;
        # do with these as you will
    }
    diag "Number of test instances: " . $report->num_test_instances;
    diag "Number of test methods: "   . $report->num_test_methods;
    diag "Number of tests:        "   . $report->num_tests;

    done_testing;

If you just want to output reporting information, you do not need to run the test suite in a subtest:

    my $test_suite = Test::Class::Moose::Runner->new->runtests;
    my $report     = $test_suite->test_report;
    ...

Or even shorter:

    my $report = Test::Class::Moose::Runner->new->runtests->test_report;

EXTRAS ^

If you would like Test::Class::Moose to take care of loading your classes for you, see Test::Class::Moose::Role::AutoUse in this distribution.

DEPRECATIONS ^

Version 0.55

Version 0.40

TODO ^

BUGS ^

Please report any bugs or feature requests to bug-test-class-moose at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Test-Class-Moose. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT ^

You can find documentation for this module with the perldoc command.

    perldoc Test::Class::Moose

You can also look for information at:

SEE ALSO ^

CONTRIBUTORS ^

AUTHOR ^

Curtis "Ovid" Poe <ovid@cpan.org>

COPYRIGHT AND LICENSE ^

This software is copyright (c) 2014 by Curtis "Ovid" Poe.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

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