A Whirlwind Tour of Test::Class
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Transcript of A Whirlwind Tour of Test::Class
OO tests for OO code Nice performance boost Easy-to-organize test suites
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Plenty!
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use strict;!use warnings;!use Test::Exception 0.88;!use Test::Differences 0.500;!use Test::Deep 0.106;!use Test::Warn 0.11;!use Test::More 0.88;!
use parent 'My::Test::Class’;!sub some_test : Tests { ... }!
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use Test::Class::Most! parent => 'My::Test::Class’;!
sub some_test : Tests { ... }!
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lib/!| Person/!| `-- Employee.pm!`-- Person.pm!
t/!| lib/!| | My/!| | | Test/!| | | `-- Class.pm!| | TestsFor/!| | | Person/!| | | `-- Employee.pm!| | `-- Person.pm!`-- test_class_tests.t!
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package My::Test::Class;!use Test::Class::Most ! attributes => ['class'];!
INIT { Test::Class->runtests }!
sub startup : Tests(startup) {…}!sub setup : Tests(setup) {}!sub teardown : Tests(teardown) {}!sub shutdown : Tests(shutdown) {}!
1;!
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package My::Test::Class;!use Test::Class::Most ! attributes => ['class'];!
INIT { Test::Class->runtests }!
sub startup : Tests(startup) {…}!sub setup : Tests(setup) {}!sub teardown : Tests(teardown) {}!sub shutdown : Tests(shutdown) {}!
1;!
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package My::Test::Class;!use Test::Class::Most ! attributes => ['class'];!
INIT { Test::Class->runtests }!
sub startup : Tests(startup) {…}!sub setup : Tests(setup) {}!sub teardown : Tests(teardown) {}!sub shutdown : Tests(shutdown) {}!
1;!
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package My::Test::Class;!use Test::Class::Most ! attributes => ['class'];!
INIT { Test::Class->runtests }!
sub startup : Tests(startup) {…}!sub setup : Tests(setup) {}!sub teardown : Tests(teardown) {}!sub shutdown : Tests(shutdown) {}!
1;!
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sub startup : Tests(startup) {! my $test = shift;! return if $test->class;!
my $class = ref $test;! $class =~ s/^TestsFor:://;!
eval "use $class";! die $@ if $@;!
$test->class($class);!}!
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package Person; !
use Moose;!
has ‘first_name’ => ( is => 'ro', isa => 'Str' );!has ‘last_name’ => ( is => 'ro', isa => 'Str' );!
sub full_name {! my $self = shift;! return $self->first_name . ' ' ! . $self->last_name;!}!
1;!
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package TestsFor::Person;!
use Test::Class::Most parent =>'My::Test::Class';!
sub constructor : Tests(3) {! my $test = shift;! my $class = $test->class;!
can_ok $class, 'new'; ! ok my $person = $class->new, ! '... and the constructor should succeed';! isa_ok $person, $class, ! '... and the object it returns';!}!
1;!http://www.slideshare.net/Ovid/a-whirlwind-tour-of-testclass
package TestsFor::Person;!
use Test::Class::Most parent =>'My::Test::Class';!
sub constructor : Tests(3) {! my $test = shift;! my $class = $test->class;! can_ok $class, 'new'; ! ok my $person = $class->new, ! '... and the constructor should succeed';! isa_ok $person, $class, ! '... and the object it returns';!}!
1;!http://www.slideshare.net/Ovid/a-whirlwind-tour-of-testclass
package TestsFor::Person;!
use Test::Class::Most parent =>'My::Test::Class';!
sub constructor : Tests(3) {! my $test = shift;! my $class = $test->class;! can_ok $class, 'new'; ! ok my $person = $class->new, ! '... and the constructor should succeed';! isa_ok $person, $class, ! '... and the object it returns';!}!
1;!http://www.slideshare.net/Ovid/a-whirlwind-tour-of-testclass
package TestsFor::Person;!
use Test::Class::Most parent =>'My::Test::Class';!
sub constructor : Tests(3) {! my $test = shift;! my $class = $test->class;! can_ok $class, 'new'; ! ok my $person = $class->new, ! '... and the constructor should succeed';! isa_ok $person, $class, ! '... and the object it returns';!}!
1;!http://www.slideshare.net/Ovid/a-whirlwind-tour-of-testclass
package TestsFor::Person;!
use Test::Class::Most parent =>'My::Test::Class';!
sub constructor : Tests(3) {! my $test = shift;! my $class = $test->class;! can_ok $class, 'new'; ! ok my $person = $class->new, ! '... and the constructor should succeed';! isa_ok $person, $class, ! '... and the object it returns';!}!
1;!http://www.slideshare.net/Ovid/a-whirlwind-tour-of-testclass
package TestsFor::Person;!
use Test::Class::Most parent =>'My::Test::Class';!
sub constructor : Tests(3) {! my $test = shift;! my $class = $test->class;! can_ok $class, 'new'; ! ok my $person = $class->new, ! '... and the constructor should succeed';! isa_ok $person, $class, ! '... and the object it returns';!}!
1;!http://www.slideshare.net/Ovid/a-whirlwind-tour-of-testclass
package TestsFor::Person;!
use Test::Class::Most parent =>'My::Test::Class';!
sub constructor : Tests(3) {! my $test = shift;! my $class = $test->class;! can_ok $class, 'new'; ! ok my $person = $class->new, ! '... and the constructor should succeed';! isa_ok $person, $class, ! '... and the object it returns';!}!
1;!http://www.slideshare.net/Ovid/a-whirlwind-tour-of-testclass
prove -lv -It/lib \! t/lib/TestsFor/Person.pm !
# INIT { Test::Class->runtests }!
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t/TestsFor/Person.pm .. # !# TestsFor::Person->constructor!
1..3!ok 1 - Person->can('new')!ok 2 - ... and the constructor should succeed!ok 3 - ... and the object it returns isa
Person!ok!All tests successful.!Files=1, Tests=3, 0 wallclock secs!Result: PASS!
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package TestsFor::Person;!Use Test::Class::Most parent => ‘My::Test::Class’;!sub constructor : Tests(3) { … }!
sub full_name : Tests(4) { ! my $test = shift;! my $person = $test->class->new(! first_name => 'Adrian',! last_name => 'Howard',! );!
is $person->first_name, 'Adrian', 'first_name correct';! is $person->last_name, 'Howard', 'last_name correct';!
can_ok $person, 'full_name';! is $person->full_name, 'Adrian Howard',! '... and it should return the correct fullname';!}!
1;!http://www.slideshare.net/Ovid/a-whirlwind-tour-of-testclass
$ prove –vl -It/lib t/TestsFor/Person.pm!t/TestsFor/Person.pm .. # !# TestsFor::Person->constructor!1..7!ok 1 - Person->can('new’)!ok 2 - ... and the constructor should succeed!ok 3 - ... and the object it returns isa Person!# !# TestsFor::Person->full_name!ok 4 - first_name correct!ok 5 - last_name correct!ok 6 - Person->can('full_name')!ok 7 - ... and it should return the correct fullname!ok!All tests successful.!Files=1, Tests=7, 0 wallclock secs!Result: PASS!
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package Person::Employee; !
use Moose;!extends 'Person';!
has ‘employee_number’ => ( ! is => ‘ro’, ! isa => ‘Int’,!);!
1;!
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package TestsFor::Person::Employee;!
use Test::Class::Most parent => 'TestsFor::Person';!
sub employee_number : Tests(2) { ! my $test = shift;! my $employee = $test->class->new(! first_name => 'John',! last_name => 'Public',! employee_number => 17,! );! can_ok $employee, 'employee_number’;! is $employee->employee_number, 17, ! '... the employee number is correct';!}!1;!
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t/TestsFor/Person/Employee.pm .. # !# TestsFor::Person::Employee->constructor!
1..16!ok 1 - Person::Employee->can('new')!ok 2 - ... and the constructor should succeed!ok 3 - ... and the object it returns isa
Person::Employee!# !# TestsFor::Person::Employee->employee_number!ok 4 - Person::Employee-
>can('employee_number')!ok 5 - ... the employee number is correct!# !# TestsFor::Person::Employee->full_name!ok 6 - first_name correct!ok 7 - last_name correct!ok 8 - Person::Employee->can('full_name')!ok 9 - ... and it should return the correct
fullname!
# !# TestsFor::Person->constructor!ok 10 - Person->can('new')!ok 11 - ... and the constructor should
succeed!ok 12 - ... and the object it returns isa
Person!# !# TestsFor::Person->full_name!ok 13 - first_name correct!ok 14 - last_name correct!ok 15 - Person->can('full_name')!ok 16 - ... and it should return the correct
fullname!ok!All tests successful.!Files=1, Tests=16, 0 wallclock secs!Result: PASS!
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t/TestsFor/Person/Employee.pm .. # !# TestsFor::Person::Employee->constructor!
1..16!ok 1 - Person::Employee->can('new')!ok 2 - ... and the constructor should succeed!ok 3 - ... and the object it returns isa
Person::Employee!# !# TestsFor::Person::Employee->employee_number!ok 4 - Person::Employee-
>can('employee_number')!ok 5 - ... the employee number is correct!# !# TestsFor::Person::Employee->full_name!ok 6 - first_name correct!ok 7 - last_name correct!ok 8 - Person::Employee->can('full_name')!ok 9 - ... and it should return the correct
fullname!
# !# TestsFor::Person->constructor!ok 10 - Person->can('new')!ok 11 - ... and the constructor should
succeed!ok 12 - ... and the object it returns isa
Person!# !# TestsFor::Person->full_name!ok 13 - first_name correct!ok 14 - last_name correct!ok 15 - Person->can('full_name')!ok 16 - ... and it should return the correct
fullname!ok!All tests successful.!Files=1, Tests=16, 0 wallclock secs!Result: PASS!
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t/TestsFor/Person/Employee.pm .. # !# TestsFor::Person::Employee->constructor!
1..16!ok 1 - Person::Employee->can('new')!ok 2 - ... and the constructor should succeed!ok 3 - ... and the object it returns isa
Person::Employee!# !# TestsFor::Person::Employee->employee_number!ok 4 - Person::Employee-
>can('employee_number')!ok 5 - ... the employee number is correct!# !# TestsFor::Person::Employee->full_name!ok 6 - first_name correct!ok 7 - last_name correct!ok 8 - Person::Employee->can('full_name')!ok 9 - ... and it should return the correct
fullname!
# !# TestsFor::Person->constructor!ok 10 - Person->can('new')!ok 11 - ... and the constructor should
succeed!ok 12 - ... and the object it returns isa
Person!# !# TestsFor::Person->full_name!ok 13 - first_name correct!ok 14 - last_name correct!ok 15 - Person->can('full_name')!ok 16 - ... and it should return the correct
fullname!ok!All tests successful.!Files=1, Tests=16, 0 wallclock secs!Result: PASS!
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t/TestsFor/Person/Employee.pm .. # !# TestsFor::Person::Employee->constructor!
1..16!ok 1 - Person::Employee->can('new')!ok 2 - ... and the constructor should succeed!ok 3 - ... and the object it returns isa
Person::Employee!# !# TestsFor::Person::Employee->employee_number!ok 4 - Person::Employee-
>can('employee_number')!ok 5 - ... the employee number is correct!# !# TestsFor::Person::Employee->full_name!ok 6 - first_name correct!ok 7 - last_name correct!ok 8 - Person::Employee->can('full_name')!ok 9 - ... and it should return the correct
fullname!
# !# TestsFor::Person->constructor!ok 10 - Person->can('new')!ok 11 - ... and the constructor should
succeed!ok 12 - ... and the object it returns isa
Person!# !# TestsFor::Person->full_name!ok 13 - first_name correct!ok 14 - last_name correct!ok 15 - Person->can('full_name')!ok 16 - ... and it should return the correct
fullname!ok!All tests successful.!Files=1, Tests=16, 0 wallclock secs!Result: PASS!
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t/TestsFor/Person/Employee.pm .. # !# TestsFor::Person::Employee->constructor!
1..16!ok 1 - Person::Employee->can('new')!ok 2 - ... and the constructor should succeed!ok 3 - ... and the object it returns isa
Person::Employee!# !# TestsFor::Person::Employee->employee_number!ok 4 - Person::Employee-
>can('employee_number')!ok 5 - ... the employee number is correct!# !# TestsFor::Person::Employee->full_name!ok 6 - first_name correct!ok 7 - last_name correct!ok 8 - Person::Employee->can('full_name')!ok 9 - ... and it should return the correct
fullname!
# !# TestsFor::Person->constructor!ok 10 - Person->can('new')!ok 11 - ... and the constructor should
succeed!ok 12 - ... and the object it returns isa
Person!# !# TestsFor::Person->full_name!ok 13 - first_name correct!ok 14 - last_name correct!ok 15 - Person->can('full_name')!ok 16 - ... and it should return the correct
fullname!ok!All tests successful.!Files=1, Tests=16, 0 wallclock secs!Result: PASS!
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sub startup : Tests(startup) {! my $test = shift;! return if $test->class;!
my $class = ref $test;! $class =~ s/^TestsFor:://;!
eval "use $class";! die $@ if $@;!
$test->class($class);!}!
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TestsFor::Person::Employee inherits TestsFor::Person’s tests
We don’t hard-code the class name Inherited test methods rock!
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Attribute Name Phase
Tests(startup)! When the test class starts
Tests(setup)! Before each test method
Tests(teardown)! After each test method
Tests(shutdown)! When the test class finishes
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Connect to a database (often in startup) Set up fixtures/transactions (setup) Clean fixtures/rollbacks (teardown) Disconnect from database (shutdown) (They’re a better place for object construction)
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package TestsFor::Customer;!
use Test::Class::Most! parent => ‘My::Test::Class’,! attributes => [‘dbh’];!
sub aaa_connect_to_db : Tests(setup) {! my $test = shift;! my $dbh = DBI->connect(…);! # or $test->{dbh} = $dbh;! $test->dbh($dbh);!}!
sub some_test : Tests {! my $test = shift;! my $dbh = $test->dbh;!…!
package TestsFor::Person::Employee;!
use Test::Class::Most! parent => ‘TestsFor::Customer’,! attributes => [‘employee’];!
sub bbb_employee : Tests(setup) {! my $test = shift;! my $employee = $test->dbh->…;! $test->employee($employee);!}!
sub kill_employee : Tests {! my $test = shift;! my $employee = $test->employee;! can_ok( $employee, ‘suffocate’ );!
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package TestsFor::Customer;!
use Test::Class::Most! parent => ‘My::Test::Class’,! attributes => [‘dbh’];!
sub aaa_connect_to_db : Tests(setup) {! my $test = shift;! my $dbh = DBI->connect(…);! # or $test->{dbh} = $dbh;! $test->dbh($dbh);!}!
sub some_test : Tests {! my $test = shift;! my $dbh = $test->dbh;!…!
package TestsFor::Person::Employee;!
use Test::Class::Most! parent => ‘TestsFor::Customer’,! attributes => [‘employee’];!
sub bbb_employee : Tests(setup) {! my $test = shift;! my $employee = $test->dbh->…;! $test->employee($employee);!}!
sub kill_employee : Tests {! my $test = shift;! my $employee = $test->employee;! can_ok( $employee, ‘suffocate’ );!
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package TestsFor::Customer;!
use Test::Class::Most! parent => ‘My::Test::Class’,! attributes => [‘dbh’];!
sub setup : Tests(setup) {! my $test = shift;! my $dbh = DBI->connect(…);! # or $test->{dbh} = $dbh;! $test->dbh($dbh);!}!
sub some_test : Tests {! my $test = shift;! my $dbh = $test->dbh;!…!
package TestsFor::Person::Employee;!
use Test::Class::Most! parent => ‘TestsFor::Customer’,! attributes => [‘employee’];!
sub setup : Tests(setup) {! my $test = shift;! $test->SUPER::setup;! my $employee = $test->dbh->…;! $test->employee($employee);!}!
sub kill_employee : Tests {! my $test = shift;! my $employee = $test->employee;! can_ok( $employee, ‘suffocate’ );!
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Before Tests
sub startup:Test(startup) {! my $test = shift;! $test->SUPER::startup;! # finish your startup!}!
sub setup : Test(setup) {! my $test = shift;! $test->SUPER::setup;! # finish your setup!}!
After Tests
sub teardown:Test(teardown){! my $test = shift;! # finish your teardown! $test->SUPER::teardown;!}!
sub shutdown:Test(shutdown){! my $test = shift;! # finish your shutdown! $test->SUPER::shutdown;!}!
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# t/test_class_tests.t!# Don’t Do This!!use lib ‘t/lib’;!
use TestsFor::Person;!use TestsFor::Person::Employee;!
Test::Class->runtests;!
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# Don’t Do This because you’ll forget one!!use lib ‘t/lib’;!use TestsFor::Person;!use TestsFor::Person::Employee;!use TestsFor::Database;!use TestsFor::PurchaseOrder;!use TestsFor::Alibi;!use TestsFor::Embezzlement;!use TestsFor::PaddingMySlides;!Test::Class->runtests;!
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# Do This!!use Test::Class::Load ‘t/lib’;!
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Finds your test classes for you My example relies on
INIT { Test::Class->runtests } in My::Test::Class.
Run the test suite: prove -l t/test_class_tests.t!
Or a single test class: prove -lv -It/lib t/TestsFor/Person.pm
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Name test classes after their classes (if possible) Name test methods after their methods (if possible) … you can’t name a method new()! Create your own base test class … with stub test control methods Name test control methods after their attribute Don’t put tests in your test control methods Do not hardcode the name of the class to test!
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Part 1: Getting started with Test::Class Part 2: Inheriting Test::Class tests Part 3: Making your testing life easier Part 4: Using test control methods Part 5: Test::Class Tricks
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Beginning Perl, Wrox Press Introduction to Perl CPAN Modules Objects (Moose!) Testing PSGI+Plack DBIx::Class Catalyst And more!
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