Theory

Mocking Fundamentals

User Event and Fire Event

PlayWright

playwright

Mocking Fundamentals

• Override Object Properties

  • random some function to always return same value

  <aside> 💡 After the test is run,

  1. need clean up the mock
  2. assign the original

  </aside>

Example

const originalPlayGame = utils.playGame
utils.getWinner = (p1, p2) => p1

const winner = thumbWar('dahye', 'dayoung')
assert.strictEqual(winner, 'dahye')

utils.getWinner = originalGetWinner

jest.spyOn

• if use spyOn no need to restore