Import AITURK IDE 1.0.0-beta.1 from Hermes 63279301; preserve MIT license

ui-tui/src/__tests__/precisionWheel.test.ts

@@ -0,0 +1,44 @@
+import { describe, expect, it } from 'vitest'
+
+import { computePrecisionWheelStep, initPrecisionWheel } from '../lib/precisionWheel.js'
+
+describe('precisionWheel', () => {
+  it('passes the first modifier-held wheel event', () => {
+    const s = initPrecisionWheel()
+
+    expect(computePrecisionWheelStep(s, 1, true, 1000)).toEqual({ active: true, entered: true, rows: 1 })
+  })
+
+  it('coalesces same-frame events without throttling line-by-line scroll', () => {
+    const s = initPrecisionWheel()
+
+    computePrecisionWheelStep(s, 1, true, 1000)
+
+    expect(computePrecisionWheelStep(s, 1, true, 1008).rows).toBe(0)
+    expect(computePrecisionWheelStep(s, 1, true, 1016).rows).toBe(1)
+  })
+
+  it('keeps queued momentum in precision mode briefly after modifier release', () => {
+    const s = initPrecisionWheel()
+
+    computePrecisionWheelStep(s, 1, true, 1000)
+
+    expect(computePrecisionWheelStep(s, 1, false, 1050)).toMatchObject({ active: true, rows: 1 })
+  })
+
+  it('leaves precision mode once modifier-free momentum goes idle', () => {
+    const s = initPrecisionWheel()
+
+    computePrecisionWheelStep(s, 1, true, 1000)
+
+    expect(computePrecisionWheelStep(s, 1, false, 1100)).toEqual({ active: false, entered: false, rows: 0 })
+  })
+
+  it('does not coalesce immediate reversals', () => {
+    const s = initPrecisionWheel()
+
+    computePrecisionWheelStep(s, 1, true, 1000)
+
+    expect(computePrecisionWheelStep(s, -1, true, 1008).rows).toBe(1)
+  })
+})