77 lines
2.4 KiB
TypeScript
77 lines
2.4 KiB
TypeScript
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import { describe, expect, it } from 'vitest'
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import { ViewportInteractionStateMachine } from './viewportInteractionState'
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const gesture = {
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trackIndex: 2,
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independent: true,
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startX: 10,
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startY: 20,
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pointerId: 7,
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kind: 'box' as const,
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xDomain: [0, 100] as [number, number],
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yDomains: { track: [-1, 1] as [number, number] },
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}
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describe('ViewportInteractionStateMachine', () => {
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it('accepts one gesture and rejects a conflicting start', () => {
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const machine = new ViewportInteractionStateMachine()
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expect(machine.begin(gesture)).toBe(true)
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expect(machine.begin({ ...gesture, pointerId: 8 })).toBe(false)
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expect(machine.state).toMatchObject({ kind: 'box', pointerId: 7 })
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})
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it('rejects moves and completion from a different pointer', () => {
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const machine = new ViewportInteractionStateMachine()
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machine.begin(gesture)
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expect(machine.move(8, { currentX: 30, currentY: 40 })).toBeNull()
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expect(machine.finish(8, { currentX: 30, currentY: 40 })).toBeNull()
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expect(machine.state?.currentX).toBe(10)
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})
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it('updates a valid pointer, completes it, and returns to idle', () => {
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const machine = new ViewportInteractionStateMachine()
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machine.begin({ ...gesture, kind: 'pan' })
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expect(machine.move(7, { currentX: 30, currentY: 40 })).toMatchObject({
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kind: 'pan',
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currentX: 30,
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currentY: 40,
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})
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expect(machine.finish(7, { currentX: 50, currentY: 60 })).toMatchObject({
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kind: 'pan',
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currentX: 50,
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currentY: 60,
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})
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expect(machine.state).toBeNull()
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})
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it('only cancels the owning pointer and supports explicit reset', () => {
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const machine = new ViewportInteractionStateMachine()
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machine.begin(gesture)
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expect(machine.cancel(8)).toBe(false)
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expect(machine.state).not.toBeNull()
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expect(machine.cancel(7)).toBe(true)
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expect(machine.state).toBeNull()
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machine.begin(gesture)
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machine.reset()
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expect(machine.state).toBeNull()
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})
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it('returns defensive copies from its state getter', () => {
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const machine = new ViewportInteractionStateMachine()
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machine.begin(gesture)
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const snapshot = machine.state!
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snapshot.currentX = 99
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snapshot.xDomain[0] = 50
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snapshot.yDomains.track![0] = 50
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expect(machine.state).toMatchObject({ currentX: 10, xDomain: [0, 100] })
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expect(machine.state?.yDomains.track).toEqual([-1, 1])
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})
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})
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