fix test

tests/src/AssetActionTest.php

@@ -45,8 +45,8 @@ public function testProcess()
             [],
             []
         );
-        $delegate = new Delegate();
-        $actual = $this->action->process($request, $delegate);
+        $requestHandler = new RequestHandler();
+        $actual = $this->action->process($request, $requestHandler);
 
         $this->assertInstanceOf(ResponseInterface::class, $actual);
 

tests/src/RequestHandler.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace Hkt\Psr7Asset;
+
+use Interop\Http\Server\RequestHandlerInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Zend\Diactoros\Response;
+
+class RequestHandler implements RequestHandlerInterface
+{
+    public function handle(ServerRequestInterface $request)
+    {
+        return new Response(null, 404);
+    }
+}