Mock redis for blpop tests as hhvm doesn't respect the timeout arg.

Author: rayward

test/Resque/Tests/Reserver/BlockingListPopReserverTest.php

@@ -22,6 +22,42 @@ public function testWaitAfterReservationAttemptReturnsTrue()
         $this->assertFalse($this->getReserver()->waitAfterReservationAttempt());
     }
 
+    public function testReserverWhenNoJobsEnqueuedReturnsNull()
+    {
+        $queues = array(
+            'queue_1',
+            'queue_2',
+            'queue_3',
+        );
+
+        $redisQueues = array(
+            'queue:queue_1',
+            'queue:queue_2',
+            'queue:queue_3',
+        );
+
+        // hhvm doesn't respect the timeout arg for blpop, so we need to mock this command
+        // https://github.com/facebook/hhvm/issues/6286
+        $redis = $this->getMockBuilder('\Resque_Redis')
+            ->disableOriginalConstructor()
+            ->setMethods(['__call'])
+            ->getMock();
+
+        $redis
+            ->expects($this->once())
+            ->method('__call')
+            ->with($this->equalTo('blpop'), $this->equalTo(array($redisQueues, 1)))
+            ->will($this->returnValue(null));
+
+        $originalRedis = Resque::$redis;
+
+        Resque::$redis = $redis;
+
+        $this->assertNull($this->getReserver($queues)->reserve());
+
+        Resque::$redis = $originalRedis;
+    }
+
     public function testReserveCallsBlpopWithTimeout()
     {
         $timeout = rand(1, 100);