jest.config.ts

/* eslint-disable import/no-extraneous-dependencies */
import { Config } from 'jest';
import { pathsToModuleNameMapper } from 'ts-jest';

import { compilerOptions } from './tsconfig.json';

const config: Config = {
  // Stop running tests after `n` failures
  bail: true,

  // Automatically clear mock calls, instances, contexts and results before every test
  clearMocks: true,

  // Indicates which provider should be used to instrument code for coverage
  coverageProvider: 'v8',

  // A preset that is used as a base for Jest's configuration
  preset: 'ts-jest',

  // The glob patterns Jest uses to detect test files
  testMatch: ['**/*.spec.ts'],

  // The paths to modules that run some code to configure or set up the testing environment before each test
  setupFiles: ['<rootDir>/.jest/setEnvVars.ts'],

  // A map from regular expressions to module names or to arrays of module names that allow to stub out resources with a single module
  moduleNameMapper: pathsToModuleNameMapper(compilerOptions.paths, {
    prefix: '<rootDir>/src/',
  }),
};

export default config;