使用 Jest 我得到:找不到“茉莉花"的类型定义文件 [英] Using Jest I get: Cannot find type definition file for 'jasmine'

问题描述

我正在使用 Angular 7 和 Jest.当我用 --codecoverage 运行 jest 时，我所有的测试都通过了，但没有覆盖构造函数中的许多分支(类似于:未涵盖构造函数上的分支).

I am using Angular 7 and Jest. When I was running jest with --codecoverage, all my tests passed but many branches in the constructor were not covered (similar to: Branches on constructor not covered).

我花了很多时间到处检查如何解决它，似乎我不得不将 jest-preset-angular 升级到第 7 版.在我这样做之后，我所有的测试套件都失败了运行以下消息:

I spent quite a lot of time checking everywhere how to solve it and it seemed I had to upgrade jest-preset-angular to version 7. After I did it, all my test suites fail to run with the following message:

src/app/whatever.component.spec.ts
 ● Test suite failed to run
    
 TypeScript diagnostics (customize using `[jest-config].globals.ts-jest.diagnostics` option):
 error TS2688: Cannot find type definition file for 'jasmine'.

我一直环顾四周，并尝试应用我找到的解决方案(例如 找不到 'jasmine' 的类型定义文件，错误 TS2688 中的错误:找不到 'jest' 的类型定义文件，...) 但没有工作.

I've been looking around and I tried to apply the solutions I found (such as Cannot find type definition file for 'jasmine', ERROR in error TS2688: Cannot find type definition file for 'jest', ...) but none worked.

我在这里复制了我在 package.json 中的一些依赖项:

I copy here some of the dependencies I have in package.json:

    "jest": "^24.1.0",
    "jest-junit": "^6.3.0",
    "jest-preset-angular": "^7.0.1",
    "ts-node": "~7.0.1",
    "tslint": "~5.9.1",
    "typescript": "3.2.4"

我之前的版本是:

    "jest-preset-angular": "^6.0.2",

更新:我使用 Angular 6 和 Jasmine 开始了我的项目，然后将其更新为 Angular 7 和 Jest.我不知道这是不是重要信息.

Update: I started my project with Angular 6 and Jasmine and I updated it to Angular 7 and Jest. I don't know if this is an important information.

推荐答案

到 compilerOptions 下的 types 字段中的 tsconfig.spec.json 并删除 jasmine 并添加 jest

Go to tsconfig.spec.json in the types field under the compilerOptions and remove jasmine and add jest

"compilerOptions": {
"module": "commonjs",
"outDir": "./out-tsc/spec",
"types": ["jest", "node"]
}

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