Function normalize

packages/jest-config/src/normalize.ts:534–1267

(
  initialOptions: Config.InitialOptions,
  argv: Config.Argv,
  configPath?: string | null,
  projectIndex = Number.POSITIVE_INFINITY,
  isProjectOptions?: boolean,
)

}

export default async function normalize(
  initialOptions: Config.InitialOptions,
  argv: Config.Argv,
  configPath?: string | null,
  projectIndex = Number.POSITIVE_INFINITY,
  isProjectOptions?: boolean,
): Promise<{
  hasDeprecationWarnings: boolean;
  options: AllOptions;
}> {
  const {hasDeprecationWarnings} = validate(initialOptions, {
    comment: DOCUMENTATION_NOTE,
    deprecatedConfig: DEPRECATED_CONFIG,
    exampleConfig: isProjectOptions ? VALID_PROJECT_CONFIG : VALID_CONFIG,
    recursiveDenylist: [
      // 'coverageThreshold' allows to use 'global' and glob strings on the same
      // level, there's currently no way we can deal with such config
      'coverageThreshold',
      'globals',
      'moduleNameMapper',
      'testEnvironmentOptions',
      'transform',
    ],
    ...(isProjectOptions && {unknown: unknownProjectOption}),
  });

  let options = normalizeMissingOptions(
    normalizeRootDir(setFromArgv(initialOptions, argv)),
    configPath,
    projectIndex,
  );

  if (options.preset) {
    options = await setupPreset(options, options.preset);
  }

  if (!options.setupFilesAfterEnv) {
    options.setupFilesAfterEnv = [];
  }

  options.testEnvironment = resolveTestEnvironment({
    requireResolveFunction: requireResolve,
    rootDir: options.rootDir,
    testEnvironment:
      options.testEnvironment ||
      require.resolve(DEFAULT_CONFIG.testEnvironment),
  });

  if (!options.roots) {
    options.roots = [options.rootDir];
  }

  if (
    !options.testRunner ||
    options.testRunner === 'circus' ||
    options.testRunner === 'jest-circus' ||
    options.testRunner === 'jest-circus/runner'
  ) {