jest.config.js

// For a detailed explanation regarding each configuration property, visit:
// https://jestjs.io/docs/en/configuration.html

module.exports = {
  // Automatically clear mock calls and instances between every test
  clearMocks: true,

  // Indicates whether the coverage information should be collected while executing the test
  collectCoverage: true,

  // An array of glob patterns indicating a set of files for which coverage information should be collected
  // collectCoverageFrom: undefined,

  // The directory where Jest should output its coverage files
  coverageDirectory: 'coverage',

  // An array of regexp pattern strings used to skip coverage collection
  coveragePathIgnorePatterns: [
    'index.ts',
    '/node_modules/'
  ],

  // An object that configures minimum threshold enforcement for coverage results
  coverageThreshold: {
    global: {
      'branches': 70,
      'functions': 70,
      'lines': 70,
      'statements': 70
    }
  },

  // An array of file extensions your modules use
  moduleFileExtensions: [
    'js',
    'json',
    'jsx',
    'ts',
    'tsx',
    'node'
  ],

  // The test environment that will be used for testing
  testEnvironment: 'node',

  // The glob patterns Jest uses to detect test files
  testMatch: [
    '**/src/**/__tests__/**/*.[jt]s?(x)',
    '**/src/**/?(*.)+(spec|test).[tj]s?(x)'
  ],
  // A map from regular expressions to paths to transformers
  transform: {
    '\\.(ts)$': 'ts-jest'
  }
}