jest.config.js

const os = require("node:os");

// Use cgroup-aware memory when available (containers), fall back to host RAM.
// process.constrainedMemory() returns the cgroup v2 limit (Node 19.6+),
// or 0/undefined outside a cgroup.
const totalMemoryBytes =
  (typeof process.constrainedMemory === "function" &&
    process.constrainedMemory()) ||
  os.totalmem();

const cpuWorkerCap = Math.max(1, Math.floor(os.cpus().length * 0.5));
const memoryWorkerCap = Math.floor(
  totalMemoryBytes / (1024 * 1024 * 1024) / 1.5,
);
const maxWorkers = Math.max(1, Math.min(cpuWorkerCap, memoryWorkerCap));

/** @type {import('jest').Config} */
module.exports = {
  testEnvironment: "node",
  testMatch: ["<rootDir>/src/**/*.test.ts", "<rootDir>/tests/**/*.test.ts"],
  collectCoverageFrom: [
    "src/**/*.ts",
    "!src/**/*.d.ts",
    "!src/desktop/preload.ts",
    "!src/browser/api.ts",
    "!src/cli/**/*",
    "!src/desktop/main.ts",
  ],
  setupFilesAfterEnv: ["<rootDir>/tests/setup.ts"],
  moduleNameMapper: {
    // Vite query suffixes and binary assets must be matched BEFORE the @/ alias
    "^@/(.+)\\.svg\\?react$": "<rootDir>/tests/__mocks__/svgReactMock.js",
    "^@/(.+)\\.txt\\?raw$": "<rootDir>/tests/__mocks__/textMock.js",
    "^@/(.*)$": "<rootDir>/src/$1",
    // lottie-web probes canvas on import, which crashes in happy-dom/jsdom
    "^lottie-react$": "<rootDir>/tests/__mocks__/lottieReactMock.js",
    "^chalk$": "<rootDir>/tests/__mocks__/chalk.js",
    "^jsdom$": "<rootDir>/tests/__mocks__/jsdom.js",
    // Mock static assets for full App rendering
    "\\.css$": "<rootDir>/tests/__mocks__/styleMock.js",
    "\\.txt$": "<rootDir>/tests/__mocks__/textMock.js",
    "\\.svg$": "<rootDir>/tests/__mocks__/svgMock.js",
  },
  // Storybook UI tests use bun:test and are run via `bun test`, so Jest must skip them.
  testPathIgnorePatterns: ["<rootDir>/tests/ui/storybook/"],
  // Avoid haste module collision with vscode extension
  modulePathIgnorePatterns: ["<rootDir>/vscode/"],
  transform: {
    "^.+\\.(ts|tsx|js|mjs)$": ["babel-jest"],
  },
  // Transform ESM-only packages. Use negative lookahead to transform everything
  // EXCEPT known CJS packages, which is more maintainable than listing all ESM packages.
  transformIgnorePatterns: [
    // Transform all node_modules - ESM packages need babel transformation
    // This is slower but ensures compatibility
    "node_modules/(?!\\.pnpm)(?!.*)",
  ],
  // High core-count containers with limited cgroup memory (for example 96 cores /
  // 32 GB) can OOM if Jest uses CPU-only parallelism, so keep roughly 1.5 GB
  // per worker.
  maxWorkers,
  // Force exit after tests complete to avoid hanging on lingering handles
  forceExit: true,
  // 10 minute timeout for integration tests, 10s for unit tests
  testTimeout: process.env.TEST_INTEGRATION === "1" ? 600000 : 10000,
};