Typing request manager

tests/incremental-json-api/app/services/request-manager.ts

@@ -1,25 +1,21 @@
 import { LegacyNetworkHandler } from '@ember-data/legacy-compat';
+import type { Handler, NextFn, RequestContext } from '@ember-data/request';
 import RequestManager from '@ember-data/request';
 import Fetch from '@ember-data/request/fetch';
-// import { CacheHandler } from '@ember-data/store';
 
-const TestHandler = {
-  async request({ request }, next) {
-    console.log('TestHandler.request', request);
-    const newContext = await next(Object.assign({}, request));
+/* eslint-disable no-console */
+const TestHandler: Handler = {
+  async request<T>(context: RequestContext, next: NextFn) {
+    console.log('TestHandler.request', context.request);
+    const newContext = await next(Object.assign({}, context.request));
     console.log('TestHandler.response after fetch', newContext.response);
-    return newContext;
+    return newContext as T;
   },
 };
 
 export default class Requests extends RequestManager {
   constructor(args) {
     super(args);
     this.use([LegacyNetworkHandler, TestHandler, Fetch]);
-
-    // TODO: This fails due to implementation in Store. It always adds cache.
-    // Maybe we should change implementation, or just warn about not adding it
-
-    // this.useCache(CacheHandler);
   }
 }