/** @type {import('jest').Config} */
const config = {
preset: 'ts-jest/presets/default-esm',
extensionsToTreatAsEsm: ['.ts'],
testEnvironment: 'node',
roots: ['<rootDir>/src', '<rootDir>/tests'],
testMatch: [
'**/__tests__/**/*.test.ts',
'**/tests/**/*.test.ts',
'**/tests/**/*.smoke.ts',
'**/tests/**/*.e2e.ts',
'**/?(*.)+(spec|test).ts'
],
collectCoverageFrom: [
'src/**/*.ts',
'!src/**/*.d.ts',
'!src/index.ts',
'!src/config.ts'
],
coverageDirectory: 'coverage',
coverageReporters: ['text', 'lcov', 'html', 'json'],
coverageThreshold: {
global: {
branches: 78,
functions: 90,
lines: 88,
statements: 88
}
},
verbose: true,
testTimeout: 10000,
setupFilesAfterEnv: ['<rootDir>/tests/setup.ts'],
// Transform configuration optimized for ESM
transform: {
'^.+\\.ts$': ['ts-jest', {
useESM: true,
tsconfig: './tsconfig.test.json'
}],
'^.+\\.js$': ['ts-jest', {
useESM: true
}]
},
// Module name mapping to handle .js extensions in TypeScript imports
moduleNameMapper: {
'^(\\.{1,2}/.*)\\.js$': '$1',
},
// Don't transform node_modules except for ESM packages that need it
transformIgnorePatterns: [
'node_modules/(?!(@modelcontextprotocol|fs-extra)/)'
],
// Enhanced error reporting
errorOnDeprecated: false,
detectOpenHandles: true,
forceExit: true,
// Performance optimizations
maxWorkers: '50%',
cache: true,
// Test result formatting
reporters: [
'default',
['jest-junit', {
outputDirectory: 'test-results',
outputName: 'junit.xml'
}]
]
};
export default config;
