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/** * Jest configuration for TypeScript ESM project * @type {import('@jest/types').Config.InitialOptions} */ const config = { // Use ts-jest preset: "ts-jest", testEnvironment: "node", // TypeScript configuration transform: { "^.+\\.tsx?$": [ "ts-jest", { tsconfig: "tsconfig.test.json", }, ], }, // Module resolution moduleDirectories: ["node_modules", "src"], moduleFileExtensions: ["ts", "tsx", "js", "jsx", "json", "node"], moduleNameMapper: { "^@/(.*)$": "<rootDir>/src/$1", "^(\\.{1,2}/.*)\\.js$": "$1", }, // Test setup and patterns setupFilesAfterEnv: ["<rootDir>/jest.setup.ts"], testMatch: ["**/__tests__/**/*.test.ts", "**/*.test.ts"], // Coverage configuration coveragePathIgnorePatterns: [ "/node_modules/", "/build/", "/__tests__/", "/__mocks__/", ], // Mock behavior clearMocks: true, resetMocks: true, restoreMocks: true, }; export default config;