1. Testing persistence (in PHP) PHPUnit & DbUnit

2. Our story by unit testing classes Started from inside to the outside

4. PHPUnit class TestClass extends PHPUnit_Framework_TestCase { public function setUp () {} public function testMethod () {} public function tearDown () {} }

5. Problems No integration guarantees Not effective for refactoring legacy code Does not ensure external quality

6. Need for integration tests To ensure external quality from top to bottom

7. Unit testing DAOs with DI and mocks $connection = createMockExpecting( " INSERT INTO table SET field = 'value' " ); $dao = new Dao( $connection ); $dao -> insert ( 'value' ); Tells nothing about the database interaction

8. Testing DAOs - injected connection $connection = createLocalTestConnection(); $dao = new Dao( $connection ); $dao -> insert ( 'value' ); assertInsertedValueMatches( 'value' ); Hard to replace in end to end tests

9. Dependency lookup

10. Testing DAOs - dependency lookup $dao = new Dao(); $dao -> insert ( 'value' ); assertInsertedValueMatches( 'value' ); http://xunitpatterns.com/Dependency Lookup.html

11. DbUnit + Etsy extensions

12. Test case init class RemoverDaoTest extends DatabaseTestCaseBase { /** * @return PHPUnit_Extensions_MultipleDatabase_Database[] */ protected function getDatabaseConfigs () { return array ( $this -> getDbConfigBuilder () -> connection ( $this -> getCentralDbConnection ()) -> dataSet ( $this -> createXmlDataSet ( 'init.xml' )) -> build () ); }

13. Datasets user: - id: 1 name: Ingrid <dataset> <table name= &quot;user&quot; > <column> id </column> <column> name </column> <row> <value> 1 </value> <value> Ingrid </value> </row> </table> </dataset> MySQL XML YAML

14. Assertions public function testRemoveNoProblem () { $remover = new RemoverDao(); $remover -> removeUser ( 1 ); $this -> assertDataSetsEqual ( $this -> createYamlDataSet ( 'empty.yml' ), $this -> getCentralDbConnection () -> createDataSet ( array ( 'user' )) ); }

15. Datasets user: - id: 1 name: Ingrid created_at: 2012-01-16 <dataset> <table name= &quot;user&quot; > <column> id </column> <column> name </column> <column> created_at </column> <row> <value> 1 </value> <value> Ingrid </value> <value> 2012-01-16 </value> </row> </table> </dataset> MySQL XML YAML

16. Dataset filter $datasetFilter = new PHPUnit_Extensions_Database_DataSet_DataSetFilter( $dataset ); $datasetFilter -> addIncludeTables ( array ( 'user' ) ); $datasetFilter -> setExcludeColumnsForTable ( 'user' , array ( 'created_at' ) );

17. Datasets user: - id: 1 name: Ingrid created_at: ##TIME## <dataset> <table name= &quot;user&quot; > <column> id </column> <column> name </column> <column> created_at </column> <row> <value> 1 </value> <value> Ingrid </value> <value> ##TIME## </value> </row> </table> </dataset> MySQL XML YAML

18. Replacement dataset $replacementDataset = new PHPUnit_Extensions_Database_DataSet_ReplacementDataSet ( $dataset , array ( '##TIME##' => TimeService::time ()) );

19. Implicit setup Common initial state, extended test-by-test Hard to share

22. Setup $user = UserBuilder :: create () -> build (); $video = VideoBuilder :: create () -> owner ( $user ) -> private () -> build (); TestDataInserter :: create (getCentralDbConnection()) -> add ( 'user' , $user ) -> add ( 'video' , $video );

23. Excercise VideoPublisherDao :: create () -> publish ( $video -> id ); Http service DAO HttpClient :: create () -> call ( 'Video::publish' , $video -> id );

26. The power of layer crossing tests Refactoring (legacy) code Increasing code coverage

28. Concurrent end-to-end black box tests Uses only the front door (public api) Isolation with unique identifiers & Δ assertions Tests real concurrency Harder to track bugs & intermittent tests http://engineering.imvu.com/2011/01/19/buildbot-and-intermittent-tests/

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