When Batch uses the add method to add jobs, the totalJobs count of the batch is incorrect in the test after using Bus::fake()

[yankewei]

Laravel Version

11.10.0

PHP Version

8.3.3

Database Driver & Version

Mysql 8.3.0

Description

The method add of the BatchFake class is not update the totalJobs property, the behaviour is not same as the Batch class.

Steps To Reproduce

1. Paste the following code into a command:

$batch = Bus::batch([])
            ->onQueue('batch-test')
            ->dispatch();

for ($i = 0; $i < 5; $i++) {
    $batch = $batch->add([function (): void {
        Log::info('Executing job');
    }]);
}

Log::info("The batch has {$batch->totalJobs} jobs");

Execute the command, and you should see the message in the log file:
local.INFO: The batch has 5 jobs
2. Paste the following code into a test to test the command:

public function testBatch()
{
      $bus = Bus::fake();

      $this->artisan("app:batch-test");

      $bus->assertBatchCount(1);
}

Run this test, and you will find the message in the log file. However, I expect the message to be testing.INFO: The batch has 5 jobs instead of:
testing.INFO: The batch has 0 jobs