AssetManager\Resolver\CollectionResolver::getAggregateResolver PHP Method

    public function getAggregateResolver()
    {
        return $this->aggregateResolver;
    }

 public function testSetGetAggregateResolver()
 {
     $resolver = new CollectionResolver();
     $aggregateResolver = $this->getMock('AssetManager\\Resolver\\ResolverInterface');
     $aggregateResolver->expects($this->once())->method('resolve')->with('say')->will($this->returnValue('world'));
     $resolver->setAggregateResolver($aggregateResolver);
     $this->assertEquals('world', $resolver->getAggregateResolver()->resolve('say'));
 }