fix: helper type (#3483)

index.d.ts

@@ -44,27 +44,27 @@ declare module 'egg' {
  /**
  * request context
  */
- ctx: Context;
+ protected ctx: Context;
 
  /**
  * Application
  */
- app: Application;
+ protected app: Application;
 
  /**
  * Application config object
  */
- config: EggAppConfig;
+ protected config: EggAppConfig;
 
  /**
  * service
  */
- service: IService;
+ protected service: IService;
 
  /**
  * logger
  */
- logger: EggLogger;
+ protected logger: EggLogger;
 
  constructor(ctx: Context);
  }
@@ -937,7 +937,7 @@ declare module 'egg' {
 
  export interface IMiddleware extends PlainObject { } // tslint:disable-line
 
- export interface IHelper extends PlainObject {
+ export interface IHelper extends PlainObject, BaseContextClass {
  /**
  * Generate URL path(without host) for route. Takes the route name and a map of named params.
  * @method Helper#pathFor

test/fixtures/apps/app-ts/app/controller/foo.ts

@@ -12,6 +12,7 @@ export default class FooController extends Controller {
  async getData() {
  try {
  this.ctx.logger.info('getData');
+ this.ctx.helper.test();
  this.ctx.body = await this.ctx.service.foo.bar();
  this.ctx.proxy.foo.bar();
  } catch (e) {

test/fixtures/apps/app-ts/app/extend/context.ts

@@ -0,0 +1,7 @@
+import { Context } from 'egg';
+
+export default {
+ test(this: Context) {
+ return this.url;
+ },
+}

test/fixtures/apps/app-ts/app/extend/helper.ts

@@ -0,0 +1,11 @@
+import { IHelper } from 'egg';
+
+export default {
+ test(this: IHelper) {
+ this.test2();
+ },
+
+ test2(this: IHelper) {
+ this.ctx.logger.info(this.ctx.test());
+ }
+}

test/fixtures/apps/app-ts/app/extend/index.d.ts

@@ -0,0 +1,9 @@
+import ExtendHelper from './helper';
+import ExtendContext from './context';
+
+declare module 'egg' {
+ type ExtendHelperType = typeof ExtendHelper;
+ type ExtendContextType = typeof ExtendContext;
+ interface IHelper extends ExtendHelperType { }
+ interface Context extends ExtendContextType { }
+}