Function isReadonlyProp

packages/jest-mock/src/index.ts:457–484

(object: unknown, prop: string)

}

function isReadonlyProp(object: unknown, prop: string): boolean {
  if (
    prop === 'arguments' ||
    prop === 'caller' ||
    prop === 'callee' ||
    prop === 'name' ||
    prop === 'length'
  ) {
    const typeName = getObjectType(object);
    return (
      typeName === 'Function' ||
      typeName === 'AsyncFunction' ||
      typeName === 'GeneratorFunction' ||
      typeName === 'AsyncGeneratorFunction'
    );
  }

  if (
    prop === 'source' ||
    prop === 'global' ||
    prop === 'ignoreCase' ||
    prop === 'multiline'
  ) {
    return getObjectType(object) === 'RegExp';
  }

  return false;
}

export class ModuleMocker {
  private readonly _environmentGlobal: typeof globalThis;