mock uuid v4 unique and stable for tests

mock-uuid.ts

jest.mock('uuid', () => {
  const base = '9134e286-6f71-427a-bf00-';
  let current = 100000000000;

  return {
    v4: () => {
      const uuid = base + current.toString();
      current++;

      return uuid;
    }
  }
});

const base = '9134e286-6f71-427a-bf00-';
let current = 100000000000;

const v4 = jest.fn(() => {
  const uuid = base + current.toString();
  current++;

  return uuid;
});

// TODO - be able to reset uuid mock

export { v4 };

import { v4 as uuidv4 } from 'uuid';

beforeEach(async () => {
  jest.clearAllMocks();
});

it('v1', async () => {
  const uuid = uuidv4();

  expect(uuid).toBe('9134e286-6f71-427a-bf00-100000000000');

  const uuid2 = uuidv4();

  expect(uuid2).toBe('9134e286-6f71-427a-bf00-100000000001');
});

it('v2', async () => {
  const uuid = uuidv4();

  expect(uuid).toBe('9134e286-6f71-427a-bf00-100000000000');
});