Test coverage does not mark unserialized closures as covered

[bernardwiesner]

I am using laravel's Bus batch to dispatch jobs, and they use closures that get serialized and un-serialized

https://laravel.com/docs/11.x/queues#dispatching-batches

Example:
https://github.com/laravel/framework/blob/46ac7829eba556031fa5f540f3771d52fa4117a2/src/Illuminate/Bus/PendingBatch.php#L173

    public function then($callback)
    {
        $this->options['then'][] = $callback instanceof Closure
            ? new SerializableClosure($callback)
            : $callback;

        return $this;
    }

This results in the code coverage marking the then closure as not covered. Is there any workaround to cover such code blocks that get serialized and un-serialized and then are executed?

[stof]

Maybe the path mapping feature of XDebug 3.5 (currently in alpha releases) could be used by serializable-closure to map the code generated for the unserialized closure to equivalent locations in the original code.

Edit: this won't work as path mapping in XDebug 3.5 is only for debugger breakpoints. Using that feature for code coverage is listed in the future scopes instead.