Replace deprecated setMethods()

[solventt]

In PhpUnit setMethods() is deprecated (sebastianbergmann/phpunit#3687) and will be removed in version 10 (sebastianbergmann/phpunit#3769). The method was split into two methods (onlyMethods and addMethods) according to their responsibilities.

But it's not that simple: setMethods() allows to mock non-existent class. So in PhpUnit 10 we will lose this feature, because onlyMethods and addMethods work with ReflectionClass internally. In this package setMethods() is used to mock non-existent classes, see:

• UriTest (strings: 140, 306, 360)
• ResponseTest (string 147)

What's the solution?

1. To use \stdClass instead of a non-existent class:

$this->getMockBuilder(\stdClass::class)->addMethods(['__invoke'])->getMock();

2. To create an empty "physical" class

Source - https://stackoverflow.com/questions/60535649/mock-non-existing-class-in-phpunit-10?rq=1

[t0mmy742]

Mocks that we want to create only need to have __toString method.
Third solution: create a mock of \Stringable interface, introduced with PHP 8.0.

$mock = $this->createMock(\Stringable::class);

PHP 7.3 and 7.4 can also work since we already have symfony/polyfill-php80 in our dependencies.

I don't think your second solution is a good idea for maintainability, but first solution is a good one.