Change QueueInterface::getChannel() result type to string only

src/Debug/QueueCollector.php

@@ -67,7 +67,7 @@ public function collectWorkerProcessing(MessageInterface $message, QueueInterfac
         if (!$this->isActive()) {
             return;
         }
-        $this->processingMessages[$queue->getChannel() ?? 'null'][] = $message;
+        $this->processingMessages[$queue->getChannel()][] = $message;
     }
 
     private function reset(): void

src/Debug/QueueDecorator.php

@@ -50,7 +50,7 @@ public function withAdapter(AdapterInterface $adapter): QueueInterface
         return new self($this->queue->withAdapter($adapter), $this->collector);
     }
 
-    public function getChannel(): ?string
+    public function getChannel(): string
     {
         return $this->queue->getChannel();
     }

src/Queue.php

@@ -37,9 +37,10 @@ public function __construct(
         $this->adapterPushHandler = new AdapterPushHandler();
     }
 
-    public function getChannel(): ?string
+    public function getChannel(): string
     {
-        return $this->adapter?->getChannel();
+        $this->checkAdapter();
+        return $this->adapter->getChannel();
     }
 
     public function push(
@@ -83,7 +84,6 @@ public function run(int $max = 0): int
             return true;
         };
 
-        /** @psalm-suppress PossiblyNullReference */
         $this->adapter->runExisting($handlerCallback);
 
         $this->logger->info(
@@ -99,16 +99,13 @@ public function listen(): void
         $this->checkAdapter();
 
         $this->logger->info('Start listening to the queue.');
-        /** @psalm-suppress PossiblyNullReference */
         $this->adapter->subscribe(fn (MessageInterface $message) => $this->handle($message));
         $this->logger->info('Finish listening to the queue.');
     }
 
     public function status(string|int $id): JobStatus
     {
         $this->checkAdapter();
-
-        /** @psalm-suppress PossiblyNullReference */
         return $this->adapter->status($id);
     }
 
@@ -143,6 +140,9 @@ private function handle(MessageInterface $message): bool
         return $this->loop->canContinue();
     }
 
+    /**
+     * @psalm-assert AdapterInterface $this->adapter
+     */
     private function checkAdapter(): void
     {
         if ($this->adapter === null) {

src/QueueInterface.php

@@ -45,5 +45,5 @@ public function status(string|int $id): JobStatus;
 
     public function withAdapter(AdapterInterface $adapter): self;
 
-    public function getChannel(): ?string;
+    public function getChannel(): string;
 }

stubs/StubQueue.php

@@ -4,6 +4,7 @@
 
 namespace Yiisoft\Queue\Stubs;
 
+use LogicException;
 use Yiisoft\Queue\Adapter\AdapterInterface;
 use Yiisoft\Queue\JobStatus;
 use Yiisoft\Queue\Message\MessageInterface;
@@ -53,8 +54,12 @@ public function withAdapter(AdapterInterface $adapter): QueueInterface
         return $new;
     }
 
-    public function getChannel(): ?string
+    public function getChannel(): string
     {
+        if ($this->adapter === null) {
+            throw new LogicException('Adapter is not set.');
+        }
+
         return $this->adapter?->getChannel();
     }
 }

tests/Unit/QueueTest.php

@@ -8,6 +8,7 @@
 use Yiisoft\Queue\Exception\AdapterConfiguration\AdapterNotConfiguredException;
 use Yiisoft\Queue\JobStatus;
 use Yiisoft\Queue\Message\Message;
+use Yiisoft\Queue\Stubs\StubAdapter;
 use Yiisoft\Queue\Tests\App\FakeAdapter;
 use Yiisoft\Queue\Tests\TestCase;
 use Yiisoft\Queue\Message\IdEnvelope;
@@ -147,4 +148,21 @@ public function testRunWithSignalLoop(): void
 
         self::assertEquals(2, $this->executionTimes);
     }
+
+    public function testGetChannel(): void
+    {
+        $queue = $this
+            ->getQueue()
+            ->withAdapter(new StubAdapter('test-channel'));
+
+        $this->assertSame('test-channel', $queue->getChannel());
+    }
+
+    public function testGetChannelWithoutAdapter(): void
+    {
+        $queue = $this->getQueue();
+
+        $this->expectException(AdapterNotConfiguredException::class);
+        $queue->getChannel();
+    }
 }

tests/Unit/Stubs/StubQueueTest.php

@@ -4,6 +4,7 @@
 
 namespace Yiisoft\Queue\Tests\Unit\Stubs;
 
+use LogicException;
 use PHPUnit\Framework\TestCase;
 use Yiisoft\Queue\JobStatus;
 use Yiisoft\Queue\Message\Message;
@@ -20,11 +21,19 @@ public function testBase(): void
         $this->assertSame($message, $queue->push($message));
         $this->assertSame(0, $queue->run());
         $this->assertSame(JobStatus::DONE, $queue->status('test'));
-        $this->assertNull($queue->getChannel());
         $this->assertNull($queue->getAdapter());
         $queue->listen();
     }
 
+    public function testGetChannelWithoutAdapter(): void
+    {
+        $queue = new StubQueue();
+
+        $this->expectException(LogicException::class);
+        $this->expectExceptionMessage('Adapter is not set.');
+        $queue->getChannel();
+    }
+
     public function testWithAdapter(): void
     {
         $sourceQueue = new StubQueue();