PHPUNIT: How to return different values ​​in mock method?

Question

PHP

The official documentation specifies the following option:

$stub = $this->createMock(SomeClass::class);

// Настроить заглушку.
$stub->method('doSomething')
      ->will($this->onConsecutiveCalls(2, 3, 5, 7));

// Вызов $stub->doSomething() вернёт разное значение каждый раз
$this->assertSame(2, $stub->doSomething());
$this->assertSame(3, $stub->doSomething());
$this->assertSame(5, $stub->doSomething());

But, in my case, this does not work - because. typing specified:

$mock->method('handle')->willReturn($this->onConsecutiveCalls($response1, $response2));

ERROR: Method handle may not return value of type PHPUnit\Framework\MockObject\Stub\ConsecutiveCalls, its
return declaration is ": ...\ResponseInterface"

It seems to be an elementary task, but I've been fiddling with the documentation and source codes for several hours.

Answer 1

This is exactly how it works:

$this->anyMock
    ->expects($this->exactly(4))
    ->method('doSomething')
    ->withConsecutive(...$args)
    ->willReturnOnConsecutiveCalls(...$results)

The number of $args and $results and the number in $this->exactly(4) are the same,
$args is an array of arrays
UPD: Now I looked at the code, in theory your method is absolutely equivalent and should work, or the one I have given will swear as well. variables $response1 and $response2 exactly implement ResponseInterface?
Cause of the problem:
You simply set the mock to one number of calls, and in the asserts you call fewer times (in the example, you set it to 4 answers, and there are only 3 asserts, that is, 1 remained charged) and the value remains in the mock, which is then called by what -either way in other sitsations!
Classic side effect. After the used mock, you need to make sure that it is empty or re-create it in a new test, most likely you have a mock in a private class variable and therefore the state is rummaged between the test methods ...
That is why expects() most likely told you what was the matter .
Solutions:

1. Create a mock in the method, do not abuse setUp ()
   
2. Control the number of calls in the method and arguments for Consecutive Calls, this will helpexpects($this->exactly(N))
   

Answer 2

You can also return willReturnCallback(function(){
$arguments = func_get_args(); // get the function arguments and do something with them
})
As a rule, you can set the behavior of the function like this