我的测试组中有两个测试。一个测试使用它，另一个使用测试。它们的工作原理似乎非常相似。它们之间的区别是什么?
describe('updateAll', () => {
it('no force', () => {
return updateAll(TableName, ["fileName"], {compandId: "test"})
.then(updatedItems => {
let undefinedCount = 0;
for (let item of updatedItems) {
undefinedCount += item === undefined ? 1 : 0;
}
// console.log("result", result);
expect(undefinedCount).toBe(updatedItems.length);
})
});
test('force update', () => {
return updateAll(TableName, ["fileName"], {compandId: "test"}, true)
.then(updatedItems => {
let undefinedCount = 0;
for (let item of updatedItems) {
undefinedCount += item === undefined ? 1 : 0;
}
// console.log("result", result);
expect(undefinedCount).toBe(0);
})
});
});
更新- 2022年11月:
根据Jest的官方API，测试和它似乎是可以互换的。正如这里所描述的@gwildu，出于可读性考虑，您应该选择其中一种。
`const request = require('supertest');`
`const app = require('../app')`
`const {it, describe} = require('@jest/globals');`
`const { sequelize, Category, User, News , Customer, Bookmark} = require('../models');`
`const {hash} = require('../helpers/bcrypt');`
`const news = require('../models/news');`
`const {queryInterface} = sequelize`
`beforeAll(async()=>{
let userData = require("../data/user.json")
userData.forEach(el => {
el.password = hash(el.password)
el.createdAt = new Date()
el.updatedAt = new Date()
});`
`afterAll(async ()=>{
await Bookmark.destroy({
truncate: true,
cascade: true,
restartIdentity: true
})`
`describe('GET /customers/news', () => {
it("should response with status 200 1", async () => {
let response = await request(app)
.get('/customers/news')
// .set({access_token})
// console.log(response.body, "<<<<NEWS NIhH");
expect(response.status).toBe(200)
expect(response.body).toBeInstanceOf(Array)
})`
`it("should response with status 200 2", async()=>{
let response = await request(app)
.get('/customers/news?filter=1,2')
expect(response.status).toBe(200)
expect(response.body).toBeInstanceOf(Array)
})`
正如其他答案所阐明的那样，它们做的是同样的事情。
我相信提供这两种方式是为了其中任何一种“RSpec”风格的测试，比如:
const myBeverage = {
delicious: true,
sour: false,
};
describe('my beverage', () => {
it('is delicious', () => {
expect(myBeverage.delicious).toBeTruthy();
});
it('is not sour', () => {
expect(myBeverage.sour).toBeFalsy();
});
});
或2)“xUnit”风格的测试，比如:
function sum(a, b) {
return a + b;
}
test('sum adds 1 + 2 to equal 3', () => {
expect(sum(1, 2)).toBe(3);
});
文档:
https://jestjs.io/docs/en/api.html#describename-fn
https://jestjs.io/docs/en/api.html#testname-fn-timeout
它们做同样的事情，但它们的名字不同，因此它们与测试名称的交互作用也不同。
test
你写什么:
describe('yourModule', () => {
test('if it does this thing', () => {});
test('if it does the other thing', () => {});
});
如果某事失败了你会得到什么:
yourModule > if it does this thing
it
你写什么:
describe('yourModule', () => {
it('should do this thing', () => {});
it('should do the other thing', () => {});
});
如果某事失败了你会得到什么:
yourModule > should do this thing
所以这是关于可读性而不是功能性。
在我看来，阅读不是自己写的失败测试的结果是有意义的。它有助于更快地理解测试的内容。
一些开发人员还将Should do this thing缩短为Does this thing，这更短一些，而且在语义上也符合it符号。
`const request = require('supertest');`
`const app = require('../app')`
`const {it, describe} = require('@jest/globals');`
`const { sequelize, Category, User, News , Customer, Bookmark} = require('../models');`
`const {hash} = require('../helpers/bcrypt');`
`const news = require('../models/news');`
`const {queryInterface} = sequelize`
`beforeAll(async()=>{
let userData = require("../data/user.json")
userData.forEach(el => {
el.password = hash(el.password)
el.createdAt = new Date()
el.updatedAt = new Date()
});`
`afterAll(async ()=>{
await Bookmark.destroy({
truncate: true,
cascade: true,
restartIdentity: true
})`
`describe('GET /customers/news', () => {
it("should response with status 200 1", async () => {
let response = await request(app)
.get('/customers/news')
// .set({access_token})
// console.log(response.body, "<<<<NEWS NIhH");
expect(response.status).toBe(200)
expect(response.body).toBeInstanceOf(Array)
})`
`it("should response with status 200 2", async()=>{
let response = await request(app)
.get('/customers/news?filter=1,2')
expect(response.status).toBe(200)
expect(response.body).toBeInstanceOf(Array)
})`
正如笑话文档所说，它们是一样的:
它的别名
测试(名称，fn，超时)
同样在别名下:it(name, fn, timeout)
描述只是为了让你的测试被分成几组
描述
描述(名字,fn)
Describe (name, fn)创建一个将几个相关测试分组在一起的块。例如，如果你有一个myBeverage对象，它应该是美味的，但不是酸的，你可以用:
const myBeverage = {
delicious: true,
sour: false,
};
describe('my beverage', () => {
test('is delicious', () => {
expect(myBeverage.delicious).toBeTruthy();
});
test('is not sour', () => {
expect(myBeverage.sour).toBeFalsy();
});
});
这不是必需的—您可以直接在顶层编写测试块。但是如果你喜欢把你的测试组织成小组，这就很方便了。
