from openpilot.system.ui.lib import application


def test_burn_in_shift_transitions_between_positions(monkeypatch):
  app = object.__new__(application.GuiApplication)
  app._burn_in_start_time = 100.0

  monkeypatch.setattr(application, "BURN_IN_PREVENTION", True)
  monkeypatch.setattr(application, "BURN_IN_SHIFT_INTERVAL", 10.0)
  monkeypatch.setattr(application, "BURN_IN_SHIFT_PIXELS", 2)
  monkeypatch.setattr(application, "BURN_IN_SHIFT_TRANSITION_SECONDS", 2.0)

  assert app._burn_in_shift(108.0) == (0.0, 0.0)
  midpoint = app._burn_in_shift(109.0)
  assert midpoint == (-1.0, 0.0)
  assert app._burn_in_shift(110.0) == (-2.0, 0.0)