我正在尝试使用测试驱动开发(TDD)进行一些功能
我正在用JavaScript编写。
checkTransparency(urlString)
maketransparent(urlString)
我正在尝试测试和开发我的两个功能,它们位于一个名为transcript.js的文件中。
这些使用inkscape和graphicsmagick npm。我检查了checkTransparent在我的其他项目中的工作情况,但是我试图确保我可以将这个transparent.js复制粘贴到另一个项目中,并在其他地方使用它。
我的项目文件夹结构如下:
+ node_modules
+ src
--- transparent.js
+ test
--- transparent.spec.js
+ package.json
+ package-lock.json
+ jest.config.js
我使用笑话作为我的测试框架。
问题是我开玩笑(或npm测试)时
我得到以下信息:
失败测试/transparent.spec.js
●测试套件无法运行
Jest encountered an unexpected token
This usually means that you are trying to import a file which Jest cannot parse, e.g. it's not plain JavaScript.
By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules".
Here's what you can do:
• To have some of your "node_modules" files transformed, you can specify a custom "transformIgnorePatterns" in your config.
• If you need a custom transformation specify a "transform" option in your config.
• If you simply want to mock your non-JS modules (e.g. binary assets) you can stub them out with the "moduleNameMapper" config option.
You'll find more details and examples of these config options in the docs:
https://jestjs.io/docs/en/configuration.html
Details:
\\..............\transparent\test\transparent.spec.js:4 <FEW DETAILS OMITTED HERE DELIBERATELY>
import { checkTransparency, makeTransparent } from "../src/transparent"; // const transparent = require("../src/transparent");
^^^^^^
SyntaxError: Cannot use import statement outside a module
at Runtime._execModule (C:/Users/Kjeong/AppData/Local/Yarn/Data/global/node_modules/jest-runtime/build/index.js:988:58)
测试套件:1个失败,总共1个 测试:总计0 快照:共0个 时间:0.862秒 运行所有测试套件。
我的jest.config.js:
module.exports = {
testEnvironment: "node",
moduleDirectories: ["node_modules", "src", "transparent"],
moduleFileExtensions: [
"js",
"json",
"jsx",
"ts",
"tsx",
"node"
],
clearMocks: true,
}
我已经尝试了以下出口,以使该设备正常工作:
export function checkTransparency(urlString) { ... }
export function makeTransparent(urlString) {... }
module.exports = {
checkTransparency: checkTransparency,
makeTransparent: makeTransparent,
};
答案 0 :(得分:0)
如果您确实要使用import
关键字,则可能需要遵循these explanations。否则为什么不只是require
?
const { checkTransparency, makeTransparent } = require('../src/transparent')
希望这会有所帮助:)
答案 1 :(得分:0)
在您的 package.json
中,使用如下配置可以解决您的问题:
{
"name": "<blah blah>",
"version": "1.0.0",
"description": "",
"type": "module",
"scripts": {
"start": "node server.js",
"test": "node --experimental-vm-modules node_modules/.bin/jest"
},
}