Summary

When trying to create a stub via createStubForIntersectionOfInterfaces() a UnknownTypeException is thrown.
But creating a stub for the seemingly unknown class via createStub() does work.

Current behavior

In my test I want to create a stub for a class and an interface:

$userRepositoryStub = $this->createStubForIntersectionOfInterfaces([
    UserRepositoryInterface::class,
    \Doctrine\ORM\EntityRepository::class
]);

When running the test I get this error:

1) [REDACTED]\MyTest::fooBarBaz
PHPUnit\Framework\MockObject\Generator\UnknownTypeException: Class or interface "Doctrine\ORM\EntityRepository" does not exist

But doing it the following way works and the assertions pass:

$userRepository = $this->createStub(\Doctrine\ORM\EntityRepository::class)
$this->assertInstanceOf(\Doctrine\ORM\EntityRepository::class, $userRepository);
$this->assertTrue(class_exists(\Doctrine\ORM\EntityRepository::class));

How to reproduce

I'am currently unable to provide a minimal reproducible example - I'll try doing so tommorrow.

But here is my (minimalized) UserRepositoryInterface interface:

interface UserRepositoryInterface extends Doctrine\Persistence\ObjectRepository
{
// [...]
}

The \Doctrine\ORM\EntityRepository class is from doctrine/orm:3.3.3: https://github.com/doctrine/orm/blob/3.3.3/src/EntityRepository.php

I should also mention that I'm not using the standard composer autoloader but a custom boostrapping script for PHPUnit.

Maybe the issue is caused by UserRepositoryInterface and \Doctrine\ORM\EntityRepository extending the same \Doctrine\Persistence\ObjectRepository interface?

I also noticed that the error message Class or interface "Doctrine\ORM\EntityRepository" does not exist is missing the backslash (\) in front of Doctrine\ which may also cause a problem when trying to find the class?

Expected behavior

Calling createStubForIntersectionOfInterfaces() should not throw an exception since the class exists.