Fix QueueWorkTest cases asserting nothing (laravel#32958)

Setting up PHPUnit's $this->expectException(),
calls to $worker->daemon() throw that exception
so the test case immediately stops there.
Subsquent assertions are being skipped.

Fixing this shows testJobRunsIfAppIsNotInMaintenanceMode
actually never runs any jobs on the queue.

When running the whole laravael/framework test suite,
Worker::memoryExceeded() can also return true from
previous test cases being run. So both of these
tests may skip running the queue, instead silently
calling exit(12) for no more memory.

tests/Queue/QueueWorkerTest.php

@@ -59,19 +59,21 @@ public function testWorkerCanWorkUntilQueueIsEmpty()
             $secondJob = new WorkerFakeJob,
         ]]);
 
-        $this->expectException(LoopBreakerException::class);
+        try {
+            $worker->daemon('default', 'queue', $workerOptions);
 
-        $worker->daemon('default', 'queue', $workerOptions);
+            $this->fail('Expected LoopBreakerException to be thrown.');
+        } catch (LoopBreakerException $e) {
+            $this->assertTrue($firstJob->fired);
 
-        $this->assertTrue($firstJob->fired);
+            $this->assertTrue($secondJob->fired);
 
-        $this->assertTrue($secondJob->fired);
+            $this->assertSame(0, $worker->stoppedWithStatus);
 
-        $this->assertSame(0, $worker->stoppedWithStatus);
+            $this->events->shouldHaveReceived('dispatch')->with(m::type(JobProcessing::class))->twice();
 
-        $this->events->shouldHaveReceived('dispatch')->with(m::type(JobProcessing::class))->twice();
-
-        $this->events->shouldHaveReceived('dispatch')->with(m::type(JobProcessed::class))->twice();
+            $this->events->shouldHaveReceived('dispatch')->with(m::type(JobProcessed::class))->twice();
+        }
     }
 
     public function testJobCanBeFiredBasedOnPriority()
@@ -276,21 +278,23 @@ public function testJobRunsIfAppIsNotInMaintenanceMode()
 
         $maintenanceModeChecker = function () {
             if ($this->maintenanceFlags) {
-                return array_pop($this->maintenanceFlags);
+                return array_shift($this->maintenanceFlags);
             }
 
             throw new LoopBreakerException;
         };
 
-        $this->expectException(LoopBreakerException::class);
-
         $worker = $this->getWorker('default', ['queue' => [$firstJob, $secondJob]], $maintenanceModeChecker);
 
-        $worker->daemon('default', 'queue', $this->workerOptions());
+        try {
+            $worker->daemon('default', 'queue', $this->workerOptions());
 
-        $this->assertEquals($firstJob->attempts, 1);
+            $this->fail('Expected LoopBreakerException to be thrown');
+        } catch (LoopBreakerException $e) {
+            $this->assertSame(1, $firstJob->attempts);
 
-        $this->assertEquals($firstJob->attempts, 0);
+            $this->assertSame(0, $secondJob->attempts);
+        }
     }
 
     public function testJobDoesNotFireIfDeleted()
@@ -349,6 +353,7 @@ private function workerOptions(array $overrides = [])
 class InsomniacWorker extends Worker
 {
     public $sleptFor;
+    public $stopOnMemoryExceeded = false;
 
     public function sleep($seconds)
     {
@@ -366,6 +371,11 @@ public function daemonShouldRun(WorkerOptions $options, $connectionName, $queue)
     {
         return ! ($this->isDownForMaintenance)();
     }
+
+    public function memoryExceeded($memoryLimit)
+    {
+        return $this->stopOnMemoryExceeded;
+    }
 }
 
 class WorkerFakeManager extends QueueManager