Odesk\Phystrix\RequestCache::exists PHP Method

    public function exists($commandKey, $cacheKey)
    {
        return array_key_exists($commandKey, $this->cachedResults) && array_key_exists($cacheKey, $this->cachedResults[$commandKey]);
    }

 public function testExists()
 {
     $result = (object) array('a' => 123);
     $this->assertFalse($this->requestCache->exists('TestCommand', 'cache-key-123'));
     $this->requestCache->put('TestCommand', 'cache-key-123', $result);
     $this->assertTrue($this->requestCache->exists('TestCommand', 'cache-key-123'));
 }