add collection wrapping for BatchFake (#47589)

Author: schonhoff

src/Illuminate/Support/Testing/Fakes/BatchFake.php

@@ -6,6 +6,7 @@
 use Illuminate\Bus\Batch;
 use Illuminate\Bus\UpdatedBatchJobCounts;
 use Illuminate\Support\Carbon;
+use Illuminate\Support\Collection;
 
 class BatchFake extends Batch
 {
@@ -79,6 +80,8 @@ public function fresh()
      */
     public function add($jobs)
     {
+        $jobs = Collection::wrap($jobs);
+
         foreach ($jobs as $job) {
             $this->added[] = $job;
         }