[10.x] Fix append and prepend batch to chain

src/Illuminate/Bus/Queueable.php

@@ -199,6 +199,11 @@ public function chain($chain)
      */
     public function prependToChain($job)
     {
+        $job = match (true) {
+            $job instanceof PendingBatch => new ChainedBatch($job),
+            default => $job,
+        };
+
         $this->chained = Arr::prepend($this->chained, $this->serializeJob($job));
 
         return $this;
@@ -212,6 +217,11 @@ public function prependToChain($job)
      */
     public function appendToChain($job)
     {
+        $job = match (true) {
+            $job instanceof PendingBatch => new ChainedBatch($job),
+            default => $job,
+        };
+
         $this->chained = array_merge($this->chained, [$this->serializeJob($job)]);
 
         return $this;

tests/Integration/Queue/JobChainingTest.php

@@ -288,6 +288,30 @@ public function testChainJobsCanBeAppended()
         $this->assertTrue(JobChainAddingAddedJob::$ranAt->isAfter(JobChainAddingExistingJob::$ranAt));
     }
 
+    public function testChainJobsCanBePrependedBatch()
+    {
+        Bus::chain([
+            new JobChainAddingPrependedBatch('j1'),
+            new JobChainingNamedTestJob('j2'),
+        ])->dispatch();
+
+        $this->runQueueWorkerCommand(['--stop-when-empty' => true]);
+
+        $this->assertEquals(['j1', 'b1', 'b2', 'j2'], JobRunRecorder::$results);
+    }
+
+    public function testChainJobsCanBeAppendedBatch()
+    {
+        Bus::chain([
+            new JobChainAddingAppendingBatch('j1'),
+            new JobChainingNamedTestJob('j2'),
+        ])->dispatch();
+
+        $this->runQueueWorkerCommand(['--stop-when-empty' => true]);
+
+        $this->assertEquals(['j1', 'j2', 'b1', 'b2'], JobRunRecorder::$results);
+    }
+
     public function testChainJobsCanBeAppendedWithoutExistingChain()
     {
         JobChainAddingAppendingJob::dispatch();
@@ -652,6 +676,50 @@ public function handle()
     }
 }
 
+class JobChainAddingAppendingBatch implements ShouldQueue
+{
+    use Dispatchable, InteractsWithQueue, Queueable;
+
+    public string $id;
+
+    public function __construct(string $id)
+    {
+        $this->id = $id;
+    }
+
+    public function handle()
+    {
+        $this->appendToChain(Bus::batch([
+            new JobChainingNamedTestJob('b1'),
+            new JobChainingNamedTestJob('b2'),
+        ]));
+
+        JobRunRecorder::record($this->id);
+    }
+}
+
+class JobChainAddingPrependedBatch implements ShouldQueue
+{
+    use Dispatchable, InteractsWithQueue, Queueable;
+
+    public string $id;
+
+    public function __construct(string $id)
+    {
+        $this->id = $id;
+    }
+
+    public function handle()
+    {
+        $this->prependToChain(Bus::batch([
+            new JobChainingNamedTestJob('b1'),
+            new JobChainingNamedTestJob('b2'),
+        ]));
+
+        JobRunRecorder::record($this->id);
+    }
+}
+
 class JobChainAddingExistingJob implements ShouldQueue
 {
     use Dispatchable, InteractsWithQueue, Queueable;