PhpUnit testing repositories Symfony findOneBy - symfony

Question

I am net to phpunit in Symfony 3 and I'm wondering what exactly should I follow when testing a repository. For example, I have the following repo function:
/**
* {#inheritdoc}
*/
public function findAdminRole()
{
$role = $this->repository->findOneBy(['name' => Role::ADMIN]);
if (null === $role) {
throw new NotFoundException();
}
return $role;
}
What exactly a test for this would look like? Should I test that the function findOneBy and the NotFoundException are called or to get real data values? I am kinda stuck here.
Thank you.

Answer 1

ok so findOneBY returns either Null or an Object, you can set up sample data which would return either Null or say a role object and test for that, here's something in my opinion to help you get started.
so, in the setup i would mock the repository:
$this->mockRepository = $this
->getMockBuilder('path to the respository')
->disableOriginalConstructor()
->setMethods(array('if you want to stub any'))
->getMock();
$this->object = new class( //this is the class under test
// all your other mocked services, ex : logger or anything else
)
now we have a mock of the repo, lets see how the sample tests would look like
1st test
public function findAdminRoleTestReturnsException(){
$name = ['name' => Role::ABC]; // consider this will return Null result from DB due to whatever reason
$exception = new NotFoundException();
// do whatever other assertions you need here
$this->mockRepository->expects($this->any())
->method('findOneBY')
->with($name)
->will($this->returnValue(null));
// Now call the function
$role = $this->object->findAdminRole();
$this->assertEquals($exception, $role);
}
in the same manner above you can write another test like:
2nd test
public function findAdminRoleTestReturnsNewRole(){
$name = ['name' => Role::ADMIN] // this will find the entry in theDB
$ testRoleObject = new Role();
$this->mockRepository->expects($this->any())
->method('findOneBY')
->with($name)
->will($this->returnValue($testRoleObject));
// Now call the function
$role = $this->object->findAdminRole();
$this->assertEquals($testRoleObject, $role);
}
hope this helps