开玩笑 moduleNameMapper 查找文件："resolver"：未定义

Question

我在路径下的 component 文件夹中有一个文本文件（除其他外）：src/components/text

但是，当使用 webpack 别名 import Text from "components/text"; 时，Jest 找不到这个文件。

我尝试添加到 package.json:


"jest": {
    "globals": {
      "NODE_ENV": "test"
    },
    "transform": {
      "\.[jt]sx?$": "babel-jest"
    },
    "verbose": false,
    "rootDir": ".",
    "collectCoverageFrom": [
      "**/*.{js,jsx,ts,tsx}",
      "!**/*.d.ts"
    ],
    "moduleFileExtensions": [
      "js",
      "jsx",
      "ts",
      "tsx"
    ],
    "moduleNameMapper": {
      "\.(css|less|scss|sass|svg)$": "identity-obj-proxy",
      "^components/(.*)$": "<rootDir>/src/components/",
      "^assets/(.*)$": "<rootDir>/src/assets/",
      "^utils/(.*)$": "<rootDir>/src/utils/",
      "^styles/(.*)$": "<rootDir>/src/styles/"
      "/^locales\/(.*)$/": "<rootDir>/src/locales/",
    },
    "testMatch": [
      "**/*.{spec,test}.{js,jsx,ts,tsx}"
    ],
    "modulePathIgnorePatterns": [
      "./dist"
    ],
    "transformIgnorePatterns": [
      "/node_modules/(?!(@opt-ui|@equinor))"
    ],
    "coverageDirectory": "<rootDir>/tests/coverage/"
  }

但我收到错误消息：

Test suite failed to run

    Configuration error:
    
    Could not locate module components/text mapped as:
    /Users/olahalvorsen/cssu-dashboard-client/src/components.
    
    Please check your configuration for these entries:
    {
      "moduleNameMapper": {
        "/^components\/(.*)$/": "/Users/olahalvorsen/cssu-dashboard-client/src/components"
      },
      "resolver": undefined
    }

所以，"^components/(.*)$": "<rootDir>/src/components/"在 moduleNameMapper 中解决了上面的第一个问题:)

但现在我又遇到了另一个错误：

FAIL  src/pages/errorpage/tests/error.test.jsx
  ● Test suite failed to run

    Cannot find module 'locales' from 'src/utils/helpers/helpers.js'

    Require stack:
      src/utils/helpers/helpers.js
      src/components/text/index.jsx
      src/pages/errorpage/error.jsx
      src/pages/errorpage/tests/error.test.jsx

      29 | import { nb, enGB } from "date-fns/locale";
      30 | 
    > 31 | import translations from "locales";
         | ^
      32 | 
      33 | export const capitalize = string => {
      34 |   if (typeof string === "string") {

我更新了上面的package.json。 locales 的相对目录是src/locales。这不应该工作吗：

  "moduleNameMapper": {
      "^locales/(.*)$": "<rootDir>/src/locales",

我尝试使用："/^locales\/(.*)$/": "<rootDir>/src/locales/"

解决方案是使用："^locales(.*)$": "<rootDir>/src/locales/"

Answer 1

根据日志，我猜您的配置是 /^components\/(.*)$/: "<rootDir>/src/components"，这与给定的代码 ^components(.*)$.

不同

假设以上是正确的，那么您可能需要更改为以下内容才能使其正常工作：

{
  "moduleNameMapper": {
    "/^components\/(.*)$/": "<rootDir>/src/components/" // You missed out `/` before the rest value ``
  },
}

Answer 2

检查 fileMock.js

的路径

就我而言，我花了很长时间才意识到 ___test___ 文件夹有三个下划线，而不是两个。

并检查文件内容在我的例子中，这是：module.exports = 'test-file-stub'

您还需要先 install jest-transform-stub。

开玩笑 moduleNameMapper 查找文件："resolver"：未定义

Jest moduleNameMapper to find files: "resolver": undefined

javascript

reactjs

jestjs

package.json