[10.x] Add Collection::wrap to add method on BatchFake

[schonhoff]

Hello,

I faced an issue (#47588) with the add method on the BatchFake class. After searching through the original add Method on the Batch class I saw the line

$jobs = Collection::wrap($jobs)-> [...]

This line is missing in the BatchFake class. This results in some weird behavior on single job adds to a batch in testing. For example my InitialJob has two Jobs to be added:

    public function handle(): void
    {
        $this->batch()->add(new FirstJob());
        $this->batch()->add(new SecondJob());
    }

In my test i would expect that the count of the $batch->added will be 2. But it is something around 22 because in the BatchFake class the $jobs aren't wrapped before they are added to the array in a foreach loop.

BatchFake add method:

    public function add($jobs)
    {
        foreach ($jobs as $job) {
            $this->added[] = $job;
        }

        return $this;
    }

If the parameter would be wrapped before the for each loop, it would provide the expected result.

I could not find test for the BatchFake class in the repository. Maybe i missed them?

If more information are needed I would love to provide them.