向默认导出抛出ReferenceError

Question

Jest无法找到属于export default的函数，但能够找到export const。我可以查看并重新定义我的所有函数是如何导出/导入的，但是我觉得这很可能只是一个配置问题，但是无法找到任何关于docs或github问题的解决方案。

有人知道一些可用于解决此问题的jest配置吗？

好的文件：

export const MyFunction = () => {..

规格：

import { MyFunction } from "src/MyFunction";
=>   ● Pass

坏文件：

export default MyFunction = () => {..

规格：

import MyFunction from "src/MyFunction";
=>   ● Test suite failed to run
    ReferenceError: MyFunction is not defined

我的jest.config.js

/*
 * For a detailed explanation regarding each configuration property, visit:
 * https://jestjs.io/docs/en/configuration.html
 */

module.exports = {
  // All imported modules in your tests should be mocked automatically
  // automock: false,

  // Automatically restore mock state between every test
  restoreMocks: true,

  // Make calling deprecated APIs throw helpful error messages
  errorOnDeprecated: true,

  // An array of directory names to be searched recursively up from the requiring module's location
  moduleDirectories: ["node_modules", "src", "test/unit"],

  // The test environment that will be used for testing
  testEnvironment: "node",

  // The glob patterns Jest uses to detect test files
  testMatch: ["**/test/**/**/*.spec.(js|jsx|ts|tsx)"],

  transformIgnorePatterns: [
    "node_modules/(?!(jest-)?react-native|react-clone-referenced-element|@react-native-community|expo(nent)?|@expo(nent)?/.*|react-navigation|@react-navigation/.*|@unimodules/.*|unimodules|sentry-expo|native-base|@sentry/.*)",
  ],

  transform: {
    "\\.js$": "<rootDir>/node_modules/react-native/jest/preprocessor.js",
  },

  // An array of regexp pattern strings that are matched against all test paths, matched tests are skipped
  testPathIgnorePatterns: ["/node_modules/"],

  reporters: ["default", "jest-junit"],

  collectCoverage: true,
  coverageReporters: ["lcov", "text-summary"],
  coveragePathIgnorePatterns: [
    "/node_modules/",
    "src/img/",
    "src/styles/",
    "test/factories/",
    "test/fixtures/",
  ],

  // Whether to use watchman for file crawling
  watchman: true,

  setupFilesAfterEnv: ["@testing-library/jest-native/extend-expect"],
  preset: "jest-expo",
  globals: {
    __DEV__: true,
    THEME: true,
    SEGMENT_KEY_STORE_INFO: true,
    INITIAL_STATE: true,
    EMPTY_MESSAGE: true,
  },
};

Answer 1

导出默认的MyFunction = () => {..将其更改为导出默认的const MyFunction = () => {..

Answer 2

好的，伙计们，这里很愚蠢，但是解决方案是将默认的导出更改为：MyFunction.js

export default () => {..

在导出默认函数声明中删除名称。希望这对有这个问题的人有帮助。