8 lines
2.4 KiB
JavaScript
8 lines
2.4 KiB
JavaScript
import {test} from 'node:test';import assert from 'node:assert/strict';
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import {createFrameQueue} from '../../src/lib/canvas-bindings/frame-queue.ts';
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import {createSessionFrameSource} from '../../src/lib/canvas-bindings/session-frames.ts';
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function clock(){let id=0;const callbacks=new Map();return{request(fn){callbacks.set(++id,fn);return id;},cancel(id){callbacks.delete(id);},step(){const batch=[...callbacks.values()];callbacks.clear();for(const fn of batch)fn();},get size(){return callbacks.size;}};}
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test('frame dirty Set deduplicates bursts, flushes last invalidation and preserves reentrant work for the next frame',()=>{const c=clock(),batches=[];let q;q=createFrameQueue(c,dirty=>{batches.push([...dirty]);if(dirty.has('a'))q.invalidate(['next']);});q.invalidate(['a','a']);q.invalidate(['b']);assert.equal(c.size,1);q.flush();assert.deepEqual(batches,[['a','b']]);assert.equal(c.size,1);c.step();assert.deepEqual(batches,[['a','b'],['next']]);q.invalidate(['discard']);q.dispose();c.step();q.invalidate(['closed']);assert.equal(batches.length,2);assert.equal(c.size,0);});
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test('canceled late callbacks cannot publish a replaced or disposed frame',()=>{const callbacks=[],c={request(fn){callbacks.push(fn);return callbacks.length;},cancel(){}},batches=[];const q=createFrameQueue(c,dirty=>batches.push([...dirty]));q.invalidate(['first']);q.flush();q.invalidate(['second']);callbacks[0]();assert.deepEqual(batches,[['first']]);q.dispose();callbacks[1]();assert.equal(batches.length,1);});
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test('session presentation coalesces preview bursts but live reads and final cancel remain immediate; unsubscribe drops pending frame',()=>{const c=clock(),listeners=new Set();let snapshot={views:new Map(),gesture:null,connectionGesture:null};const source={getSnapshot:()=>snapshot,subscribe(fn){listeners.add(fn);return()=>listeners.delete(fn);}},framed=createSessionFrameSource(source,c);let paints=0;const stop=framed.subscribe(()=>paints++);const emit=next=>{snapshot=next;for(const fn of listeners)fn();};for(let i=0;i<20;i++)emit({...snapshot,gesture:{targets:[{id:'a',incarnation:1}],preview:new Map([['a',{x:i}]])}});assert.equal(c.size,1);assert.equal(paints,0);assert.equal(framed.getSnapshot().gesture.preview.get('a').x,19);c.step();assert.equal(paints,1);emit({...snapshot,gesture:null});assert.equal(framed.getSnapshot().gesture,null);c.step();assert.equal(paints,2);emit({...snapshot,views:new Map([['v',{}]])});stop();c.step();assert.equal(paints,2);assert.equal(listeners.size,0);});
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