react-hook-form/src/__tests__/logic/generateId.test.ts

import generateId from '../../logic/generateId';

describe('generateId', () => {
  it('should generate a unique id', () => {
    expect(/\w{8}-\w{4}-4\w{3}-\w{4}-\w{12}/i.test(generateId())).toBeTruthy();
  });

  it('should fallback to performance if crypto is undefined', () => {
    Object.defineProperty(window, 'crypto', {
      value: undefined,
    });

    expect(/\w{8}-\w{4}-4\w{3}-\w{4}-\w{12}/i.test(generateId())).toBeTruthy();
  });

  it('should fallback to current date if performance is undefined', () => {
    Object.defineProperty(window, 'performance', {
      value: undefined,
    });

    expect(/\w{8}-\w{4}-4\w{3}-\w{4}-\w{12}/i.test(generateId())).toBeTruthy();
  });
});