jest.config.json

{
  "transform": {
    "^.+\\.js$": "babel-jest",
    "^.+\\.svelte$": [
      "./node_modules/svelte-jester/dist/transformer.mjs",
      {
        "preprocess": true
      }
    ],
    "^.+\\.ts$": "ts-jest"
  },
  "moduleNameMapper": {
    "^\\$lib(.*)$": "<rootDir>/src/lib$1",
    "^\\$app(.*)$": [
      "<rootDir>/.svelte-kit/dev/runtime/app$1",
      "<rootDir>/.svelte-kit/build/runtime/app$1"
    ]
  },
  "extensionsToTreatAsEsm": [
    ".svelte",
    ".ts"
  ],
  "moduleFileExtensions": [
    "js",
    "svelte",
    "ts"
  ],
  "setupFilesAfterEnv": [
    "@testing-library/jest-dom/extend-expect"
  ],
  "globals": {
    "ts-jest": {
      "tsconfig": "tsconfig.spec.json",
      "useESM": true
    }
  },
  "testEnvironment": "jsdom",
  "collectCoverageFrom": [
    "./src/**",
    "!./src/routes/**",
    "!./src/global.d.ts",
    "!./src/hooks.ts",
    "!./src/__tests__/**"
  ],
  "testRegex": ".src/__tests__/(?!integration/).*\\.test\\.ts"
}