Bug 1833950 - Add gtest. r=dlrobertson

            velocityFromFullDataViaHistory);

  EXPECT_NE(velocityFromPartialData, velocityFromFullDataViaHistory);

}

TEST_F(APZCPanningTester, DuplicatePanEndEvents_Bug1833950) {

  // Send a pan gesture that triggers a fling animation at the end.

  // Note that we need at least two _PAN events to have enough samples

  // in the velocity tracker to compute a fling velocity.

  PanGesture(PanGestureInput::PANGESTURE_START, apzc, ScreenIntPoint(50, 80),

             ScreenPoint(0, 2), mcc->Time());

  mcc->AdvanceByMillis(5);

  apzc->AdvanceAnimations(mcc->GetSampleTime());

  PanGesture(PanGestureInput::PANGESTURE_PAN, apzc, ScreenIntPoint(50, 80),

             ScreenPoint(0, 10), mcc->Time());

  mcc->AdvanceByMillis(5);

  apzc->AdvanceAnimations(mcc->GetSampleTime());

  PanGesture(PanGestureInput::PANGESTURE_PAN, apzc, ScreenIntPoint(50, 80),

             ScreenPoint(0, 10), mcc->Time());

  mcc->AdvanceByMillis(5);

  apzc->AdvanceAnimations(mcc->GetSampleTime());

  PanGesture(PanGestureInput::PANGESTURE_END, apzc, ScreenIntPoint(50, 80),

             ScreenPoint(0, 0), mcc->Time(), MODIFIER_NONE,

             /*aSimulateMomentum=*/true);

  // Give the fling animation a chance to start.

  SampleAnimationOnce();

  apzc->AssertStateIsFling();

  // Send a duplicate pan-end event.

  // This test is just intended to check that doing this doesn't

  // trigger an assertion failure in debug mode.

  PanGesture(PanGestureInput::PANGESTURE_END, apzc, ScreenIntPoint(50, 80),

             ScreenPoint(0, 0), mcc->Time(), MODIFIER_NONE,

             /*aSimulateMomentum=*/true);

}