jest.config.base.ts

/*
 * For a detailed explanation regarding each configuration property and type check, visit:
 * https://jestjs.io/docs/configuration
 */

import type { JestConfigWithTsJest } from 'ts-jest';
import { pathsToModuleNameMapper } from 'ts-jest';

export const baseConfig: JestConfigWithTsJest = {
  // Automatically clear mock calls, instances, contexts and results before 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: ['src/**/*.ts'],

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

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

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

  // A list of reporter names that Jest uses when writing coverage reports
  coverageReporters: [
    'lcov',
    'clover',
    'text',
    'html',
  ],

  // An object that configures minimum threshold enforcement for coverage results
  // coverageThreshold: undefined,

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

  // A list of paths to modules that run some code to configure or set up the testing environment
  setupFiles: [
    'dotenv/config'
  ],

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

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

  // An array of regexp pattern strings that are matched against all test paths, matched tests are skipped
  testPathIgnorePatterns: [
    '.history',
    '__mocks__',
    'node_modules',
    'generated',
  ],

  // Default timeout of a test in milliseconds.
  testTimeout: 30000,

  // A map from regular expressions to paths to transformers
  transform: {
    '^.+\\.tsx?$': ['ts-jest', {
      tsconfig: 'tsconfig.spec.json'
    }]
  },

  // Indicates whether each individual test should be reported during the run
  verbose: true
};

export function configWithResolvedModulePaths(compilerOptions: { baseUrl: string, paths: Record<string, string[]> }): JestConfigWithTsJest {
  return {
    ...baseConfig,
    modulePaths: [compilerOptions.baseUrl],
    moduleNameMapper: pathsToModuleNameMapper(compilerOptions.paths, { prefix: '<rootDir>/' }),
  };
}