导入反应图时，Jest 因“未定义自我”而失败

Question

我正在尝试创建一个与 npm 依赖项交互的基本玩笑测试：react-diagrams

失败的测试

import { DiagramModel } from '@projectstorm/react-diagrams'

test('importing react diagrams', () => {
    let x = DiagramModel
});

仅引用 DiagramModel 类会导致此错误：

    ReferenceError: self is not defined

    > 1 | import { DiagramModel } from '@projectstorm/react-diagrams'
        | ^
      2 |
      3 | test('importing react diagrams', () => {
      4 |     let x = DiagramModel

      at Object.<anonymous> (node_modules/@projectstorm/react-diagrams/dist/index.umd.js:1:331)
      at Object.<anonymous> (tests/DiagramModel.test.ts:1:1)

其他测试工作正常，并且依赖项在捆绑到其他地方时工作正常。

jest.config.js

module.exports = {
  preset: 'ts-jest',
  testEnvironment: 'node',
};

package.json

"jest": "^26.6.3",
"ts-jest": "^26.5.2",
...

有什么想法可以解决这个问题吗？

复制

在codesandbox 中添加了测试+ 配置（但无法让测试运行程序获取它）。完整的repo

Answer 1

经过一些测试，它终于可以使用这个配置了：

jest.config.js

module.exports = {
  preset: 'ts-jest',
  testEnvironment: 'jsdom',
};

package.json :

{
  "name": "jest-test",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT",
  "devDependencies": {
    "jest": "^26.6.3",
    "ts-jest": "^26.5.2"
  },
  "scripts": {
    "test": "jest"
  },
  "dependencies": {
    "@emotion/react": "^11.1.5",
    "@emotion/styled": "^11.3.0",
    "@projectstorm/react-canvas-core": "^6.5.2",
    "@projectstorm/react-diagrams": "^6.5.2",
    "@projectstorm/react-diagrams-routing": "^6.5.2",
    "closest": "^0.0.1",
    "dagre": "^0.8.5",
    "pathfinding": "^0.4.18",
    "paths-js": "^0.4.11",
    "react": "^17.0.2",
    "resize-observer-polyfill": "^1.5.1"
  }
}

您错过了 @projectstorm/react-diagrams 是 react 库并且它需要 dom 环境而不是 nodejs 的事实。