Testing Magento 2

Testing in Magento 2
Testing in Magento 2 - #MageTestFest, Nov. 2017 - contact@vinaikopp.com - twitter://@VinaiKopp

1. Running Tests
2. Writing Tests

Running all the tests

$ bin/magento dev:tests:run [all | unit | integration]

Running specific tests

Unit Tests

$ vendor/bin/phpunit
--config "dev/tests/unit/phpunit.xml.dist"
["app/code/My/Module/Test/Unit"]

$ alias unit-test="$(pwd)/vendor/bin/phpunit
-c $(pwd)/dev/tests/unit/phpunit.xml.dist"

$ unit-test

$ unit-test "app/code/My/Module/Test/Unit"

Integration Test

What is the difference?

Real Objects Interact

Integration Tests need the
Runtime Environment

Integration Test Framework Bootstrap:
1. If TESTS_CLEANUP is set
4 clear test environment cache
4 uninstall Magento
2. If Magento is not installed
4 install Magento & dump the DB
4 on consecutive runs:
import the dump before install

Separate DB
cp dev/tests/integration/etc/install-config-mysql.php.dist
dev/tests/integration/etc/install-config-mysql.php
vi dev/tests/integration/etc/install-config-mysql.php

Tweak settings
cp dev/tests/integration/phpunit.xml.dist
dev/tests/integration/phpunit.xml

dev/tests/integration/phpunit.xml.dist
<phpunit>
...
<php>
...
<const name="TESTS_CLEANUP" value="enabled"/>

...
</php>
...
</phpunit>

TESTS_CLEANUP == disabled
speeds things up

TESTS_CLEANUP == disabled
manual cleanup required

Enable TESTS_EXTRA_VERBOSE_LOG
in phpunit.xml to see what is going on
during bootstrap.

Every run gets it's own
etc, pub and var dirs
dev/tests/integration/tmp/sandbox-0-
b79c13eb842cf3211459b11c775bfbde/

rm -r integration/tmp/sandbox-*
fresh start!

Executing Integration Tests

Executing integration tests
!= unit tests
$ vendor/bin/phpunit -c dev/tests/integration/phpunit.xml
Could not read "dev/tests/integration/phpunit.xml".

$ cd dev/tests/integration
$ ../../../vendor/bin/phpunit

Running Tests in
PHPStorm

1. Set up PHP interpreter

2. Set up PHPUnit (1/2)

3. Set up PHPUnit (2/2)

4. Create run configuration

5. Run tests with one of
^ F10
^ F9 (debug)
or click:

Writing Tests

Writing Unit Tests
Nothing Magento 2 specific

Writing Integration Tests
Very Magento 2 specific

Magento 2 Testing Framework
dev/tests/integration/framework

ObjectManager is a'okay!

Test Framework ObjectManager
MagentoTestFrameworkObjectManager::getInstance()

Fixtures

Fixtures
Fix the system into a known state
before a test is executed.

/**
* @magentoDataFixture Magento/Sales/_files/order.php
* @magentoDataFixture Magento/Customer/_files/customer.php
* @magentoDataFixture myCustomFixture
*/
public function testSomethingWithAnOrderAndACustomer()
{
// ...
}
public static function myCustomFixture()
{
// ...

Complex Fixtures:
(e.g. Sessions, Order Placement, Customer...)
https://github.com/tddwizard/magento2-fixtures

Config Fixtures

Store Scope
/**
* @magentoConfigFixture current_store catalog/price/scope 1
*/
public function testDoesSomeoneReadThisHelpMeLetMeOut()
{
// ...

Global Scope
/**
* @magentoConfigFixture currency/options/allow USD
*/
public function testTastesLikeMashAndPie()
{
// ...

Test Isolation

DataBase Isolation

Transactions
/**
* @magentoDbIsolation enabled
*/
public function testWithSideEffects
{
// ...

Transactions
/**
* @magentoDataFixture Magento/Foo/_files/bar.php
*/
public function testTheFixtureIsAppliedWithinATransaction
{
// ...

Application Isolation

Reset Magento after test
/**
* @magentoAppIsolation enabled
*/
public function testTestWithSingletons()
{

Selecting a application area
/**
* @magentoAppArea frontend
*/
public function testRendersTheCustomerNameInWelcomeMessage()
{

Most important!

Choose the right test granularity based
on
4 Business Value
4 Personal Skill
4 Available Time

Don't test for testing's sake

Make the tests valuable

Time for a sip of
☕
before we dive in!

Testing Magento 2

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