Question

以下是Jest代码，用于测试节点代码（HapiJs端点）的实用程序功能（isAuthorized）：

**Auth.js:**

 export const isAuthorized = (request, h) => 
 throw Boom.unauthorized('unauthorized') 



**aut.test.js:**
import { isAuthorized } from './Auth';
test('it should return unauthorized', async () => {
  const request = { };


  expect(await isAuthorized(request)).toThrowError(/unauthorized/);
})

执行此测试时。它给出错误并跟踪指向函数实际上在Boom.unauthorized('some error')处抛出.unauthorized的位置。跟踪根本没有帮助，至少对我没有帮助...

问题是测试一个以合理预期抛出Boom错误的函数的最佳方法。

依赖项包括：

"hapi": "^18.1.0", 
"jest": "^24.1.0", 
"babel-jest": "^24.1.0",
"regenerator-runtime": "^0.13.1",
"@babel/cli": "^7.2.3",  
"@babel/core": "^7.2.2",
"@babel/plugin-transform-runtime": "^7.2.0",

Answer 1

根据Jest's docs，可以将toThrow与一个类一起用作参数，这将检查引发的错误是否是该类的实例。因此，您可以（根据this进行验证）：

const Boom = require('boom');
...
// mind `.rejects`
const rejected = expect(isAuthorized(request, h)).rejects;
rejected.toThrow(Boom);
rejected.toThrow('unauthorized');

Answer 2

这对我有用：

import Boom from 'boom';

const isAuthorized = (request, h) => {throw Boom.unauthorized('unauthorized');};

test('should throw an error if unauthorized', () => {
const request = {};

expect(() => isAuthorized(request)).toThrowError(Boom.unauthorized('unauthorized'));
    });

在Jest Expect中处理Boom错误时无法理解该错误

2 个答案: