Skip to main content

Configuring Jest

Once your jest.config has been set up to your liking, we'll need to make some changes to support the Cucumber Runner.

Add the Cucumber transformer​

With @autometa/jest-transformer installed, we can add it as a transform module for *.feature files. We can also make *.feature a test extension which Jest can load

// jest.config.ts
default export {
  transform: {
    "^.+\\.feature$": "@autometa/jest-transformer"
  },
  moduleFileExtensions: ["feature", "js", "json", "ts", "tsx"],
  testRegex: "(/integration/feature/.*|(\\.|/)(test|spec))\\.feature$"
};

For this example we will hold our tests in integration/feature and name them with the .feature extension.

Setup Files After Env​

We need to setup the Cucumber environment before Jest runs. We can do this by adding a setupFilesAfterEnv property to our Jest config, and reference our autometa.config.ts file and reflect-metadata.

// jest.config.ts
export default {
  setupFilesAfterEnv: ["reflect-metadata", "./autometa/config.ts"]
};