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bitwarden-browser/libs/shared/jest.config.angular.js

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/* eslint-env node */
/* eslint-disable @typescript-eslint/no-var-requires */
const { defaultTransformerOptions } = require("jest-preset-angular/presets");
/** @type {import('jest').Config} */
module.exports = {
testMatch: ["**/+(*.)+(spec).+(ts)"],
// Workaround for a memory leak that crashes tests in CI:
// https://github.com/facebook/jest/issues/9430#issuecomment-1149882002
// Also anecdotally improves performance when run locally
maxWorkers: 3,
transform: {
"^.+\\.(ts|js|mjs|svg)$": [
"jest-preset-angular",
{
...defaultTransformerOptions,
// Jest does not use tsconfig.spec.json by default
tsconfig: "<rootDir>/tsconfig.spec.json",
// Further workaround for memory leak, recommended here:
// https://github.com/kulshekhar/ts-jest/issues/1967#issuecomment-697494014
// Makes tests run faster and reduces size/rate of leak, but loses typechecking on test code
// See https://bitwarden.atlassian.net/browse/EC-497 for more info
isolatedModules: true,
astTransformers: {
before: ["<rootDir>/../../libs/shared/es2020-transformer.ts"],
},
},
],
},
};