为什么在角“ TestBed”中找不到模块？

Question

could you please tell me why why module in not found in angular ? 你能告诉我为什么为什么在angular中找不到模块吗？ here is my code https://codesandbox.io/s/8k7vlvl5q2 这是我的代码https://codesandbox.io/s/8k7vlvl5q2

issue is on this line 问题在这条线上

<<import { ComponentFixture, async, TestBed } from "@angular/testing";
>>

TestBed is not found TestBed

Answer 1

There is no module named @angular/testing . 没有名为@angular/testing模块。

You have to import TestBed from @angular/core/testing . 您必须从@angular/core/testing导入TestBed 。

Change your import line to 将您的导入行更改为

import { ComponentFixture, async, TestBed } from "@angular/core/testing";

Also make sure you install @angular/core correctly. 另外，请确保正确安装@angular/core 。