Fix animation stale reference

packages/core/src/runtime.test.ts

@@ -1,7 +1,12 @@
 import { createApp, defineComponent, nextTick } from 'vue'
 import { createMemoryHistory, createRouter } from 'vue-router'
 import { beforeEach, describe, expect, it, vi } from 'vitest'
-import { createNativeRouter, definePresentation, shouldCommitGesture } from './runtime'
+import {
+  createNativeRouter,
+  definePresentation,
+  shouldCommitGesture,
+  springTimeScaleForVelocity,
+} from './runtime'
 
 const Page = defineComponent({ template: '<div>page</div>' })
 
@@ -36,9 +41,16 @@ beforeEach(() => {
 describe('gesture decisions', () => {
   it('uses progress or a deliberate velocity to commit', () => {
     expect(shouldCommitGesture(0.4, 0)).toBe(true)
-    expect(shouldCommitGesture(0.12, 0.7)).toBe(true)
-    expect(shouldCommitGesture(0.04, 1.4)).toBe(false)
-    expect(shouldCommitGesture(0.2, 0.1)).toBe(false)
+    expect(shouldCommitGesture(0.12, 1.4)).toBe(true)
+    expect(shouldCommitGesture(0.04, 4)).toBe(false)
+    expect(shouldCommitGesture(0.2, 0.4)).toBe(false)
+  })
+
+  it('settles a fast flick more quickly without unbounded spring steps', () => {
+    expect(springTimeScaleForVelocity(0)).toBe(1)
+    expect(springTimeScaleForVelocity(2)).toBeCloseTo(1.6)
+    expect(springTimeScaleForVelocity(8)).toBe(3)
+    expect(springTimeScaleForVelocity(-20)).toBe(3)
   })
 })