11 lines
2.1 KiB
JavaScript
11 lines
2.1 KiB
JavaScript
/**
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* 指针捕获辅助函数的对象替身测试，不分派真实 DOM PointerEvent。
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* 指针 ID 与捕获目标共同决定归属，旧 lostpointercapture 不能取消新目标或重新捕获后的手势。
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*/
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import {test} from 'node:test';import assert from 'node:assert/strict';
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import {ownsPointerCapture,acquirePointerCapture,releasePointerCapture} from '../../src/lib/canvas-bindings/pointer-capture.ts';
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// move/up/cancel 检查 pointerId；lostpointercapture 还检查事件 target 与当前捕获状态，空 owner 不匹配。
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test('pointer move/up/cancel only match their owner and old lost-capture cannot cancel a replacement target',()=>{const capture={},other={},owner={pointerId:7,capture};for(const type of ['pointermove','pointerup','pointercancel']){assert.equal(ownsPointerCapture(owner,{pointerId:8,type}),false);assert.equal(ownsPointerCapture(owner,{pointerId:7,type}),true);}assert.equal(ownsPointerCapture(owner,{pointerId:7,type:'lostpointercapture',target:other}),false);assert.equal(ownsPointerCapture(owner,{pointerId:7,type:'lostpointercapture',target:capture}),true);assert.equal(ownsPointerCapture(null,{pointerId:7}),false);const recaptured={hasPointerCapture:()=>true};assert.equal(ownsPointerCapture({pointerId:7,capture:recaptured},{pointerId:7,type:'lostpointercapture',target:recaptured}),false);});
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// 成功捕获只释放一次；节点脱离导致的 set/hasPointerCapture 异常作为捕获失败或安全清理处理，不升级为业务错误。
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test('failed capture and detached release stay transport failures, while a held capture releases once',()=>{let held=false,releases=0;const target={setPointerCapture(){held=true;},hasPointerCapture(){return held;},releasePointerCapture(){held=false;releases++;}};assert.equal(acquirePointerCapture(target,1),true);releasePointerCapture(target,1);releasePointerCapture(target,1);assert.equal(releases,1);assert.equal(acquirePointerCapture({...target,setPointerCapture(){throw Error('detached');}},2),false);assert.doesNotThrow(()=>releasePointerCapture({...target,hasPointerCapture(){throw Error('detached');}},2));});
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