Jest 找不到模块 FileName.css(映射为 identity-obj-proxy) [英] Jest Could not locate module FileName.css (mapped as identity-obj-proxy)

问题描述

我一直在尝试为我的 React 项目设置测试环境，但在导入 CSS 文件时遇到了意外令牌问题.我将 moduleNameMapper 添加到 package.json 以修复它，现在我正面临这个问题.有谁知道我能做些什么来解决这个问题?

I've been trying to set up a testing environment for my React project and I had a problem with Unexpected token when importing the CSS file. i added the moduleNameMapper to the package.json to fix it and now i'm facing this issue. Does anyone know what can i do to fix this?

> myProject@0.0.1 test C:UsersadminDocumentsmyApp
> jest

FAIL _tests_Home.test.js
  ● Test suite failed to run

    Configuration error:

    Could not locate module react-datepicker/dist/react-datepicker-cssmodules.css (mapped as identity-obj-proxy)

    Please check:

    "moduleNameMapper": {
      "/^.+.(css|less)$/": "identity-obj-proxy"
    },
    "resolver": undefined

Test Suites: 1 failed, 1 total
Tests:       0 total
Snapshots:   0 total
Time:        1.894s
Ran all test suites.
npm ERR! Test failed.  See above for more details.

package.json 的笑话部分

jest portion of package.json

  "jest": {
    "transform": {
      "^.+\.jsx?$": "babel-jest"
    },
    "moduleNameMapper": {
      "\.(s?css|less)$": "identity-obj-proxy"
    }
  },

推荐答案

确保你的 devDependencies 中有 identity-obj-proxy

make sure you have identity-obj-proxy in your devDependencies

"devDependencies": {
  "identity-obj-proxy": "^3.0.0",
  ...
}

如果没有，运行

npm install --save-dev identity-obj-proxy

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