我试图以角度运行我的测试，但显然我得到一个错误，如：
TypeError: _this.handler.handle is not a function
at MergeMapSubscriber.project (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/common/esm5/http.js:1464:80)
at MergeMapSubscriber.webpackJsonp../node_modules/rxjs/_esm5/operators/mergeMap.js.MergeMapSubscriber._tryNext (http://localhost:9876/_karma_webpack_/webpack:/node_modules/rxjs/_esm5/operators/mergeMap.js:128:1)
at MergeMapSubscriber.webpackJsonp../node_modules/rxjs/_esm5/operators/mergeMap.js.MergeMapSubscriber._next (http://localhost:9876/_karma_webpack_/webpack:/node_modules/rxjs/_esm5/operators/mergeMap.js:118:1)
at MergeMapSubscriber.webpackJsonp../node_modules/rxjs/_esm5/Subscriber.js.Subscriber.next (http://localhost:9876/_karma_webpack_/webpack:/node_modules/rxjs/_esm5/Subscriber.js:92:1)
at ScalarObservable.webpackJsonp../node_modules/rxjs/_esm5/observable/ScalarObservable.js.ScalarObservable._subscribe (http://localhost:9876/_karma_webpack_/webpack:/node_modules/rxjs/_esm5/observable/ScalarObservable.js:51:1)
at ScalarObservable.webpackJsonp../node_modules/rxjs/_esm5/Observable.js.Observable._trySubscribe (http://localhost:9876/_karma_webpack_/webpack:/node_modules/rxjs/_esm5/Observable.js:172:1)
at ScalarObservable.webpackJsonp../node_modules/rxjs/_esm5/Observable.js.Observable.subscribe (http://localhost:9876/_karma_webpack_/webpack:/node_modules/rxjs/_esm5/Observable.js:160:1)
at MergeMapOperator.webpackJsonp../node_modules/rxjs/_esm5/operators/mergeMap.js.MergeMapOperator.call (http://localhost:9876/_karma_webpack_/webpack:/node_modules/rxjs/_esm5/operators/mergeMap.js:92:1)
at Observable.webpackJsonp../node_modules/rxjs/_esm5/Observable.js.Observable.subscribe (http://localhost:9876/_karma_webpack_/webpack:/node_modules/rxjs/_esm5/Observable.js:157:1)
at FilterOperator.webpackJsonp../node_modules/rxjs/_esm5/operators/filter.js.FilterOperator.call (http://localhost:9876/_karma_webpack_/webpack:/node_modules/rxjs/_esm5/operators/filter.js:61:1)
我在测试中没有改变任何东西，但在我的组件中我添加了一个新的导入：import {Router} from "@angular/router";当然在我的测试中我确实在导入中添加了RouterModule。我做错了什么？
2 回答
问题是我没有模拟我的组件中使用的方法。正确嘲弄确实解决了这个问题。
Delte node_modules 文件夹并执行命令：npm install