From 8ef23f1d786493de55d839d7d8624dda18e40598 Mon Sep 17 00:00:00 2001
From: Robin Baum <robin.baum@europace.de>
Date: Wed, 6 Nov 2024 09:58:19 +0100
Subject: [PATCH] WIP

---
 src/core/compose.spec.ts | 6 +++++-
 src/core/compose.ts      | 2 +-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/core/compose.spec.ts b/src/core/compose.spec.ts
index 7d942c2..8907b5c 100644
--- a/src/core/compose.spec.ts
+++ b/src/core/compose.spec.ts
@@ -18,16 +18,20 @@ it('should execute middleware handlers in order', async () => {
       order.push(middleware1);
       return handler(...args);
     };
+  middleware1['meta'] = {1: '1'};
   const middleware2 =
     (handler) =>
     (...args) => {
       order.push(middleware2);
       return handler(...args);
     };
+  middleware2['meta'] = {2: '2'};
 
-  compose(middleware1, middleware2)(async () => {})({});
+  const composedHandler = compose(middleware1, middleware2)(async () => {});
+  composedHandler({});
 
   expect(order).toEqual([middleware1, middleware2]);
+  expect(composedHandler['meta']).toEqual({1: '1', 2: '2'});
 });
 
 it('should provide actual handler reference via "actual" property', async () => {
diff --git a/src/core/compose.ts b/src/core/compose.ts
index f48d389..b1ca17e 100644
--- a/src/core/compose.ts
+++ b/src/core/compose.ts
@@ -293,5 +293,5 @@ export function compose<E1, E2, E3, R1, R2, R3>(
 // -> Anyway: This should be fixed in the future
 export function compose<E1, E2, R1, R2>(f: Middleware<E1, E2, R1, R2>): Middleware<E1, E2, R1, R2>;
 export function compose(...fns) {
-  return fns.reduce((f, g) => (handler) => Object.assign(f(g(handler)), { actual: handler }));
+  return fns.reduce((f, g) => (handler) => Object.assign(f(g(handler)), { actual: handler, meta: {...f.meta, ...g.meta} }));
 }