Route resolving: Show better error message when method is not callable

src/Middleware/ResolvesMiddlewareTrait.php

@@ -15,7 +15,7 @@ trait ResolvesMiddlewareTrait
      * Resolve the middleware with the container
      */
     protected function resolveMiddleware(
-        string|callable|MiddlewareInterface|RequestHandlerInterface $middleware
+        string|callable|array|MiddlewareInterface|RequestHandlerInterface $middleware
     ): MiddlewareInterface|RequestHandlerInterface {
         if ($this->isMiddleware($middleware)) {
             return $middleware;

tests/Unit/Middleware/ResolvesMiddlewareTraitTest.php

@@ -12,6 +12,7 @@ use InvalidArgumentException;
 use PHPUnit\Framework\MockObject\MockObject;
 use PHPUnit\Framework\TestCase;
 use Psr\Http\Server\MiddlewareInterface;
+use stdClass;
 
 class ResolvesMiddlewareTraitTest extends TestCase
 {
@@ -51,6 +52,20 @@ class ResolvesMiddlewareTraitTest extends TestCase
         $middleware->callResolveMiddleware('UnresolvableClass');
     }
 
+    /**
+     * @covers \Engelsystem\Middleware\ResolvesMiddlewareTrait::resolveMiddleware
+     */
+    public function testResolveMiddlewareNotCallable(): void
+    {
+        /** @var Application|MockObject $container */
+        $container = $this->createMock(Application::class);
+
+        $middleware = new ResolvesMiddlewareTraitImplementation($container);
+
+        $this->expectException(InvalidArgumentException::class);
+        $middleware->callResolveMiddleware([new stdClass(), 'test']);
+    }
+
     /**
      * @covers \Engelsystem\Middleware\ResolvesMiddlewareTrait::resolveMiddleware
      */

tests/Unit/Middleware/Stub/ResolvesMiddlewareTraitImplementation.php

@@ -18,7 +18,7 @@ class ResolvesMiddlewareTraitImplementation
     }
 
     public function callResolveMiddleware(
-        string|callable|MiddlewareInterface|RequestHandlerInterface $middleware
+        string|callable|array|MiddlewareInterface|RequestHandlerInterface $middleware
     ): MiddlewareInterface|RequestHandlerInterface {
         return $this->resolveMiddleware($middleware);
     }