Allow addMethods on unknown type mock

[alamirault]

Since #3687 setMethods is deprecated in favor of onlyMethods and addMethods

It was possible to do this

$this->getMockBuilder('UnknownClass')
            ->allowMockingUnknownTypes()
            ->setMethods(['execute'])
            ->getMock();

but with

$this->getMockBuilder('UnknownClass')
            ->allowMockingUnknownTypes()
            ->addMethods(['execute'])
            ->getMock();

An exception is thrown PHPUnit\Framework\MockObject\ReflectionException: Class UnknownClass does not exist.

So is not possible to mock unknown types.

A possibility is to check allowMockingUnknownTypes in mockBuilder and if is true not thrown exception (as suggested here #3687 (comment))

What do you think ? Or how can I mock methods on unknown type ? (if you are ok, I can make a PR)

[sebastianbergmann]

I would gladly consider a pull request. Thanks!

[sebastianbergmann]

getMockBuilder() will be soft-deprecated (@deprecated annotation) in PHPUnit 10.1, deprecated (triggering a deprecation warning) in PHPUnit 11, and removed in PHPUnit 12. Therefore no changes should be made to it anymore.