Install

The package requires jest-preset-angular@14 to be installed as a peer dependency.

npm install --save-dev @dotenv-run/jest-angular

Usage

Add the following to your jest.config.js, more information can be found in the jest-preset-angular.

ESM support is required for Jest to understand import.meta.env notation.

const jestConfig = {
  // Required for ESM support
  preset: "jest-preset-angular/presets/defaults-esm",
  setupFilesAfterEnv: ["<rootDir>/setup-jest.ts"],
  testMatch: ["<rootDir>/src/app/**/*.(spec|jest).ts"],
  moduleNameMapper: {
    "^rxjs(/operators$)?$":
      "<rootDir>/node_modules/rxjs/dist/bundles/rxjs.umd.js",
    tslib: "<rootDir>/node_modules/tslib/tslib.es6.mjs",
  },

  // @dotenv-run/jest-angular transformer
  transform: {
    "^.+\\.(ts)$": [
      "@dotenv-run/jest-angular",
      {
        useESM: true,
        stringifyContentPathRegex: "\\.(html|svg)$",
      },
    ],
  },
};

export default jestConfig;

Add the following to your setup-jest.ts file.

// Required for ESM support
import "jest-preset-angular/setup-jest.mjs";

// Load environment variables for Jest
import { env } from "@dotenv-run/core";
env({ root: "../../..", files: [".env", ".env.app"] });

Run your tests with jest. More information can be found in the Jest documentation.

NODE_OPTIONS=--experimental-vm-modules npx jest

or

node --experimental-vm-modules /path/to/node_modules/jest/bin/jest.js

If you're using Nx

NODE_OPTIONS=--experimental-vm-modules nx test

node --experimental-vm-modules /path/to/node_modules/nx/bin/nx.js test