public function testCreate()
 {
     $this->assertFalse($this->provider->queueExists());
     $stub = $this->provider->getCache();
     $stub->expects($this->once())->method('contains')->will($this->returnValue(true));
     $this->assertTrue($this->provider->queueExists());
     $this->assertTrue($this->provider->create());
     $this->assertTrue($this->provider->queueExists());
     $provider = $this->getIronMqProvider(['subscribers' => [['protocol' => 'email', 'endpoint' => '*****@*****.**']]]);
     $this->setExpectedException('InvalidArgumentException');
     $provider->create();
 }