jest

config

Jest-cli 有很多必要的 config，比如说

• moduleNameMapper: 自定义处理 test 文件里的 require
• transform: 在这里做文件的预处理
• setupFiles: 在这里做统一初始化处理，比如给 global 挂值

use timeout

jest.runAllTimers();

Object.defineProperty(localModule, 'require', {
      value: this._createRequireImplementation(localModule, options)
    });

_transformAndBuildScript(filename, options, instrument, fileSource){}

originalCode:

Code:

''use strict';\n// require('jest-cli/bin/jest');\nvar _jsxFileName = "/Users/dearvikki/workspace/fe-libs/react/packages/react-dom/src/__tests__/ReactSmoosh-test.js";var React;\nvar ReactDOM;\nvar ReactDOMServer;\nvar ReactTestUtils;\n\ndescribe('ReactSmoosh', function () {\n  beforeEach(function () {\n    // jest.resetModules();\n    React = require('react');\n    ReactDOM = require('react-dom');\n    // ReactDOMServer = require('react-dom/server');\n    // ReactTestUtils = require('react-dom/test-utils');\n …

jest-runtime:

 constructInjectedModuleParameters() {
    return [
      'module',
      'exports',
      'require',
      '__dirname',
      '__filename',
      'global',
      'jest',
      ...this._config.extraGlobals
    ];
  }