Mockery & mocking basics

Source code: https://github.com/hrach/posobota-mockery

Transcript

1. Mockery & mocking basics Jan Škrášek @hrachcz github.com/nextras github.com/hrach
2. Poll • Who is testing? • Who use mocking tool? • Who use Mockery?
3. Test types • Unit tests • Ingtegrations tests o Regression tests • Acceptance tests • … Mock objects
4. Integration tests • object composition • real functionality
5. Unit tests • class functionality only! • all dependencies mocked
6. Mock object Mock object is simulated object that mimic the behavior of real object in a controlled way.
7. Integration test $driver = $connection->getDriver(); $parser = new SqlProcessor($driver); Assert::same( 'SELECT `a`.`b`', $parser->process('SELECT [a.b]') );
8. Unit test $driver = Mockery::mock(IDriver::class); $parser = new SqlProcessor($driver); $driver->shouldReceive('delimite') ->with('a.b')->andReturn('`a`.`b`'); Assert::same( 'SELECT `a`.`b`', $parser->process('SELECT [a.b]') );
9. Mockery Composer mockery/mockery Pádraic Brady Current version 0.9
10. Mockery – general $mock = Mockery::mock(IDriver::class); // $mock instanceof MockInterface; $mock->should… Mockery::close();
11. Mockery – methods $mock->shouldRecieve('method') ->once()->twice() ->times(4) ->ordered() ->with('foo') ->andReturn('bar')->andThrow()
12. Mockery – arguments $mock->shouldRecieve('method') ->with(Mockery::any()) ->with(2, Mockery::any()) ->with(Mockery::on(function($arg) { return TRUE; }) ->with(Mockery::anyOf(1, 2)) ->with(Mockery::type('float')
13. Mockery – returning $mock->shouldRecieve('method') ->andReturn(TRUE) ->andReturnUsing(function($arg) { return strtoupper($arg); }) ->andThrow() ->andSet($property, $value);
14. Unit tests • Are needed • Are useful • But… there are some exceptions…
15. $this->mapper->shouldReceive('getRepository')->once()->andReturn($this->mapper); $this->mapper->shouldReceive('getEntityClassNames')->once()->andReturn(['EntityClass']); $this->metadataStorage->shouldReceive('get')->once()->with('EntityClass')->andReturn($this->entityM $this->queryBuilder->shouldReceive('getFromAlias')->once()->andReturn('books'); $this->mapper->shouldReceive('getStorageReflection')->once()->andReturn($this->reflection); $propertyMetadata = Mockery::mock('Nextras\Orm\Entity\Reflection\PropertyMetadata'); $propertyMetadata->relationshipRepository = 'AuthorsRepository'; $propertyMetadata->relationshipType = PropertyMetadata::RELATIONSHIP_MANY_HAS_ONE; // translator $this->entityMetadata->shouldReceive('getProperty')->once()->with('translator')->andReturn($property $this->model->shouldReceive('getRepository')->once()->with('AuthorsRepository')->andReturn($this-> $this->model->shouldReceive('getMapper')->once()->andReturn($this->mapper); $this->mapper->shouldReceive('getStorageReflection')->once()->andReturn($this->reflection); $this->reflection->shouldReceive('getStoragePrimaryKey')->once()->andReturn(['id']); $this->reflection->shouldReceive('convertEntityToStorageKey')->once()->with('translator')->andReturn( $this->mapper->shouldReceive('getTableName')->once()->andReturn('authors'); $this->mapper->shouldReceive('getRepository')->once()->andReturn($this->mapper); $this->mapper->shouldReceive('getEntityClassNames')->once()->andReturn(['EntityClass2']); $this->metadataStorage->shouldReceive('get')->once()->with('EntityClass2')->andReturn($this->entityM // name $this->entityMetadata->shouldReceive('getProperty')->once()->with('name'); $this->reflection->shouldReceive('convertEntityToStorageKey')->once()->with('name')->andReturn('nam $this->queryBuilder->shouldReceive('leftJoin')->once()->with('books', 'authors', 'authors', '[books.transl $this->queryBuilder->shouldReceive('addOrderBy')->once()->with('authors.name'); $this->builderHelper->processOrderByExpression('this->translator->name', ICollection::ASC, $this->qu
16. Unit tests • To much work to mock? o Just SPLIT the class. • Should we mock?: o scalars/arrays/objects o entities/crates o model layer • Integration tests
17. Integration tests • Are quite difficult • You need: o Setup database/queue o Prepare testing data (insert into database) o Working internet connection o … • Solution: PARTIAL MOCKS
18. Partial mocks • Mock only something • Mock only some methods $mock = Mockery::mock(MysqlDriver::class) ->makePartial(); $mock->shouldReceive(…);
19. DEMO TIME
20. Recap • Use composition!!! • Use interfaces. • Create small classes. • Choose your library carefully. • Write unit/integration tests.
21. Thank you Jan Škrášek @hrachcz github.com/nextras github.com/hrach Questions?