public function testSetAssetOnResponseNoMimeType()
{
$asset = new Asset\FileAsset(__FILE__);
$resolver = $this->getMock(ResolverInterface::class);
$resolver->expects($this->once())->method('resolve')->with('asset-path')->will($this->returnValue($asset));
$assetManager = new AssetManager($resolver);
$request = $this->getRequest();
$assetManager->resolvesToAsset($request);
$assetManager->setAssetOnResponse(new Response());
}