我正在尝试向我的API发送CORS POST请求,并且每次使用“Authorization”标头时都会抛出TypeError。请求甚至没有被发送,因此服务器不参与。但这只发生在我的测试中。当我在Chrome中试用它时效果很好。
以下是我正在测试的功能:
export const postNewEmployee = formData => {
return fetch('http://localhost:3003', {
method: 'POST',
headers: {
'Authorization': 'Bearer test123',
'Content-Type': 'application/json'
},
body: JSON.stringify(formData)
})
.then(response => response)
.catch(error => {
throw error;
});
};
及其测试:
import * as API from './api';
describe('postNewEmployee', () => {
it('posts the form data asynchronously', () => {
let formData = {
employee: {
name: 'Test Person',
email: 'test@person.nu',
address: 'an adress 123'
}
};
return API.postNewEmployee(formData)
.then(json => {
expect(json.status).toEqual(201);
}).catch(error => {
console.log(error);
});
});
});
该应用程序是使用create-react-app创建的react / redux应用程序,因此我使用Jest和JSDOM来测试它。问题是,如果我从fetch()调用注释掉Authorization标头,它就可以正常工作。但如果我添加标题,我会得到这个:
TypeError: Cannot convert undefined or null to object
at Object.getRequestHeader (/Users/johanh/Kod/react-app/node_modules/react-scripts/node_modules/jsdom/lib/jsdom/living/xhr-utils.js:20:23)
at setDispatchProgressEvents (/Users/johanh/Kod/react-app/node_modules/react-scripts/node_modules/jsdom/lib/jsdom/living/xmlhttprequest.js:909:38)
at XMLHttpRequest.send (/Users/johanh/Kod/react-app/node_modules/react-scripts/node_modules/jsdom/lib/jsdom/living/xmlhttprequest.js:700:11)
at /Users/johanh/Kod/react-app/node_modules/react-scripts/node_modules/whatwg-fetch/fetch.js:429:11
at Object.<anonymous>.self.fetch (/Users/johanh/Kod/react-app/node_modules/react-scripts/node_modules/whatwg-fetch/fetch.js:373:12)
at Object.<anonymous>.exports.postNewEmployee.formData [as postNewEmployee] (/Users/johanh/Kod/react-app/src/api/api.js:20:10)
at Object.it (/Users/johanh/Kod/react-app/src/api/api.test.js:75:16)
at Object.<anonymous> (/Users/johanh/Kod/react-app/node_modules/react-scripts/node_modules/jest-jasmine2/build/jasmine-async.js:42:32)
at attemptAsync (/Users/johanh/Kod/react-app/node_modules/react-scripts/node_modules/jest-jasmine2/vendor/jasmine-2.4.1.js:1919:24)
at QueueRunner.run (/Users/johanh/Kod/react-app/node_modules/react-scripts/node_modules/jest-jasmine2/vendor/jasmine-2.4.1.js:1874:9)
正如我所说,这只发生在测试中。在浏览器中它工作正常。
我觉得我在这里遗漏了一些明显的东西,但我却看不到它。我查看了fetch规范和jsdom文档,但无济于事。有什么想法吗?
答案 0 :(得分:0)
通常,您不应该在单元测试中提出实际请求。处理此问题的最佳方法是使用模拟而不是真正的fetch
实现。
我假设您正在使用fetch
的JS实现。因此,您可以将fetch
设置为您在测试中想要的内容。
import * as API from './api';
describe('postNewEmployee', () => {
it('posts the form data asynchronously', () => {
// set fetch to a mock that always returns a solved promise
const fetch = jest.fn((url, options) => return Promise.resolve({status: 201}))
global.fetch = fetch;
let formData = {
employee: {
name: 'Test Person',
email: 'test@person.nu',
address: 'an adress 123'
}
};
//test that fetch was called with the correct parameters
expect(fetch.mock.calls[0][0]).toBe('http://localhost:3003')
expect(fetch.mock.calls[0][1]).toEqual(formData)
return API.postNewEmployee(formData)
.then(json => {
expect(json.status).toEqual(201);
}).catch(error => {
console.log(error);
});
});
});