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UE5 C++ 创建可缩放的相机

脱下愤怒的小裤衩 2024-02-21 阅读 35
前端tdd

文章目录



相对原教程,我在学习开始时(2023.08)采用的是当前最新版本:

版本
@babel/core^7.16.0
@pmmmwh/react-refresh-webpack-plugin^0.5.3
@svgr/webpack^5.5.0
@testing-library/jest-dom^5.17.0
@testing-library/react^13.4.0
@testing-library/user-event^13.5.0
babel-jest^27.4.2
babel-loader^8.2.3
babel-plugin-named-asset-import^0.3.8
babel-preset-react-app^10.0.1
bfj^7.0.2
browserslist^4.18.1
camelcase^6.2.1
case-sensitive-paths-webpack-plugin^2.4.0
css-loader^6.5.1
css-minimizer-webpack-plugin^3.2.0
dotenv^10.0.0
dotenv-expand^5.1.0
eslint^8.3.0
eslint-config-react-app^7.0.1
eslint-webpack-plugin^3.1.1
file-loader^6.2.0
fs-extra^10.0.0
html-webpack-plugin^5.5.0
identity-obj-proxy^3.0.0
jest^27.4.3
jest-enzyme^7.1.2
jest-resolve^27.4.2
jest-watch-typeahead^1.0.0
mini-css-extract-plugin^2.4.5
postcss^8.4.4
postcss-flexbugs-fixes^5.0.2
postcss-loader^6.2.1
postcss-normalize^10.0.1
postcss-preset-env^7.0.1
prompts^2.4.2
react^18.2.0
react-app-polyfill^3.0.0
react-dev-utils^12.0.1
react-dom^18.2.0
react-refresh^0.11.0
resolve^1.20.0
resolve-url-loader^4.0.0
sass-loader^12.3.0
semver^7.3.5
source-map-loader^3.0.0
style-loader^3.3.1
tailwindcss^3.0.2
terser-webpack-plugin^5.2.5
web-vitals^2.1.4
webpack^5.64.4
webpack-dev-server^4.6.0
webpack-manifest-plugin^4.0.2
workbox-webpack-plugin^6.4.1"

具体配置、操作和内容会有差异,“坑”也会有所不同。。。


一、Jest 前端自动化测试框架基础入门

二、Jest难点进阶

1.snapshot 快照测试

新建 lesson9.js

export const generateConfig = () => {
  return {
    server: 'http://localhost',
    port: 8080
  }
}

新建 lesson9.test.js

import { generateConfig } from "./lesson9";

test('测试 generateConfig', async () => {
    expect(generateConfig()).toEqual({
      server: 'http://localhost',
      port: 8080
    })
})

对于这种配置文件最简单的测试思路就是如上面这样写,但是这样的话每次配置文件有改动都需要相应修改测试案例,并不友好,因此快照功能应运而生!!!

修改 lesson9.test.js

test('测试 generateConfig', async () => {
  expect(generateConfig()).toMatchSnapshot();
})

运行,日志如下:

 PASS  ./lesson9.test.js
  √ 测试 generateConfig (6ms)1 snapshot written.
Snapshot Summary
 › 1 snapshot written from 1 test suite.

Test Suites: 1 passed, 1 total
Tests:       1 passed, 1 total
Snapshots:   1 written, 1 total
Time:        3.697s

toMatchSnapshot: 匹配快照,首次执行会在 测试案例文件所在目录下生成一个 __snapshots__ 目录,目录下有个文件 lesson9.test.js.snap

// Jest Snapshot v1, https://goo.gl/fbAQLP

exports[`测试 generateConfig 1`] = `
Object {
  "port": 8080,
  "server": "http://localhost",
}
`;

若是下次测试生成快找文件与之前不同,则测试不会通过,试一下:

修改 lesson9.js

export const generateConfig = () => {
  return {
    server: 'http://localhost',
    port: 8080,
    alisa: {}
  }
}

运行测试用例,日志如下:

FAIL  src/lesson9/__tests__/lesson9.test.js
  × 测试 generateConfig (10ms)

  ● 测试 generateConfig

    expect(received).toMatchSnapshot()

    Snapshot name: `测试 generateConfig 1`

    - Snapshot
    + Received

      Object {
    +   "alisa": Object {},
        "port": 8080,
        "server": "http://localhost",
      }

      2 |
      3 | test('测试 generateConfig', async () => {
    > 4 |   expect(generateConfig()).toMatchSnapshot();
        |                            ^
      5 | })

      at Object.<anonymous> (src/lesson9/__tests__/lesson9.test.js:4:28)1 snapshot failed.
Snapshot Summary
 › 1 snapshot failed from 1 test suite. Inspect your code changes or re-run jest with `-u` to update them.

Test Suites: 1 failed, 1 total
Tests:       1 failed, 1 total
Snapshots:   1 failed, 1 total
Time:        4.32s

失败,快照不匹配,若是确定要修改,且在命令行模式,可以输入 u 更新快照,若是一个文件中只能有一个包含多个快照 需要输入 i 进行交互式的一个个对比更新。最后回车返回即可。

在这里插入图片描述

不过这样的配置文件都是写死的,若是配置文件内容是动态变化的比如:

修改 lesson9.js

export const generateConfig = () => {
  return {
    server: 'http://localhost',
    port: 8080,
    time: new Date()
  }
}

这样的话每次生成的快照一定是不一样的,也就通不过测试了

修改 lesson9.test.js

test('测试 generateConfig', async () => {
  expect(generateConfig()).toMatchSnapshot({
    time: expect.any(Date)
  });
})

这样的话 time 只会对比类型,不会对比值,测试就可以通过啦

安装 prettier

npm i prettier@1.18.2 -S

修改 lesson9.test.js(toMatchSnapshot 改为 toMatchInlineSnapshot)

test("测试 generateConfig", async () => {
  expect(generateConfig()).toMatchInlineSnapshot({
    time: expect.any(Date)
  });
});

运行测试用例,日志如下:

PASS  src/lesson9/__tests__/lesson9.test.js
  √ 测试 generateConfig (27ms)1 snapshot written.
 › 1 snapshot obsolete.
   • 测试 generateConfig 1
Snapshot Summary
 › 1 snapshot written from 1 test suite.
 › 1 snapshot obsolete from 1 test suite. To remove it, re-run jest with `-u`.
   ↳ src/lesson9/__tests__/lesson9.test.js
       • 测试 generateConfig 1

Test Suites: 1 passed, 1 total
Tests:       1 passed, 1 total
Snapshots:   1 obsolete, 1 written, 1 total
Time:        4.151s

运行过后 lesson9.test.js 变了样子:

test("测试 generateConfig", async () => {
  expect(generateConfig()).toMatchInlineSnapshot(
    {
      time: expect.any(Date)
    },
    `
    Object {
      "port": 8080,
      "server": "http://localhost",
      "time": Any<Date>,
    }
  `
  );
});

可以看到快照作为第二个参数被保存到了测试案例里。


本文仅作记录, 实战要点待后续专文总结,敬请期待。。。

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