@autosoft/jest-preset

A base to easily run Jest with SWC.

If I should maintain this repo, please ⭐️

DM me on Twitter if you have questions or suggestions.

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This package bundles Jest and SWC together, providing an fast and easy way to run tests.

It comes preconfigured to work with TypeScript and ESM.

Installation

yarn add --dev @autosoft/jest-preset

npm install --save-dev @autosoft/jest-preset

pnpm add --save-dev @autosoft/jest-preset

Usage

In your package.json file:

{
  "jest": {
    "preset": "@autosoft/jest-preset"
  }
}

Jest

Now to run jest, run yarn jest or npm run jest.

Jest Preset

All tests will need to be in the test directory and end with .test.ts. Additionally, coverage will be collected from all files in the source directory.

{
  "collectCoverage": true,
  "collectCoverageFrom": [
    "source/**/*.ts"
  ],
  "coverageProvider": "v8",
  "coverageReporters": [
    "text"
  ],
  "extensionsToTreatAsESM": [
    ".ts",
    ".tsx"
  ],
  "moduleNameMapper": {
    "^#(.*)": "$1",
    "^(\\.{1,2}/.*)\\.js$": "$1"
  },
  "testRegex": "test/(.*).test.ts$",
  "transform": {
    "^.+\\.tsx?$": [
      "@swc/jest", {
        "jsc": {
          "target": "es2019"
        }
      }
    ]
  }
}

Dependencies

• @swc/core: Super-fast alternative for babel
• @swc/jest: swc integration for jest
• jest: Delightful JavaScript Testing.

Dev Dependencies

• jsonlint: Validate JSON

License

MIT - The MIT License