How do you test complex UI state transitions reliably?

programming web dev
1

Complex UI states often create flaky tests. What test strategy gives confidence in transitions without over-mocking implementation details.

Yoshiii

2

Treat the UI like a small state machine, then test user-visible results and one stable transition signal so failures show which hop broke.

it("goes idle -> loading -> success", async () => {
  render(<ProfileCard api={fakeApi.ok({ name: "Mina" })} />)
  await user.click(screen.getByRole("button", { name: /load/i }))
  expect(screen.getByText(/loading/i)).toBeInTheDocument()
  await screen.findByText("Mina")
  expect(transitionLog).toEqual(["idle", "loading", "success"])
})

BobaMilk