Merge "Skip the swipe animation if it already reached targetScene" into main

        targetOffset: Float,

        targetScene: SceneKey,

    ): OffsetAnimation {

        // Skip the animation if we have already reached the target scene and the overscroll does

        // not animate anything.

        val hasReachedTargetScene =

            (targetScene == toScene && progress >= 1f) ||

                (targetScene == fromScene && progress <= 0f)

        val skipAnimation =

            hasReachedTargetScene &&

                currentOverscrollSpec?.transformationSpec?.transformations?.isEmpty() == true

        return startOffsetAnimation {

            val animatable = Animatable(dragOffset, OffsetVisibilityThreshold)

            val isTargetGreater = targetOffset > animatable.value

            val job =

                coroutineScope

                    .launch {

                        // TODO(b/327249191): Refactor the code so that we don't even launch a

                        // coroutine if we don't need to animate.

                        if (skipAnimation) {

                            snapToScene(targetScene)

                            return@launch

                        }

                        try {

                            val swipeSpec =

                                transformationSpec.swipeSpec

        dragController.onDragStopped(velocity = 0f)

        assertTransition(isUserInputOngoing = false)

    }

    @Test

    fun emptyOverscrollImmediatelyAbortsSettleAnimationWhenOverProgress() = runGestureTest {

        // Overscrolling on scene B does nothing.

        layoutState.transitions = transitions { overscroll(SceneB, Orientation.Vertical) {} }

        // Swipe up to scene B at progress = 200%.

        val middle = Offset(SCREEN_SIZE / 2f, SCREEN_SIZE / 2f)

        val dragController = onDragStarted(startedPosition = middle, overSlop = up(2f))

        assertTransition(fromScene = SceneA, toScene = SceneB, progress = 2f)

        // Release the finger.

        dragController.onDragStopped(velocity = -velocityThreshold)

        // Exhaust all coroutines *without advancing the clock*. Given that we are at progress >=

        // 100% and that the overscroll on scene B is doing nothing, we are already idle.

        runCurrent()

        assertIdle(SceneB)

    }

}