jest.config.js

/** @type {import('ts-jest').JestConfigWithTsJest} */
module.exports = {
  preset: 'ts-jest',
  testEnvironment: 'node',
  testMatch: ['<rootDir>/tests/**/*.test.ts'],
  setupFilesAfterEnv: ['<rootDir>/jest.setup.js'],
  collectCoverageFrom: ['src/**/*.ts', '!src/**/index.ts'],
  coverageDirectory: 'coverage',
  coverageReporters: ['text', 'lcov', 'json-summary'],
  moduleNameMapper: {
    '^@/(.*)$': '<rootDir>/src/$1',
  },
  transform: {
    '^.+\\.tsx?$': [
      'ts-jest',
      {
        // Suppress pre-existing type errors in source files so tests can run.
        // Type-checking is enforced separately via `tsc --noEmit`.
        diagnostics: false,
      },
    ],
  },
};