import {test} from 'node:test';
import assert from 'node:assert/strict';
import {createNodeInternalsBatch} from '../../src/lib/canvas-bindings/node-internals.ts';
test('10000 mounted nodes coalesce repeated measurement requests into one renderer update',()=>{
 const tasks=[],calls=[],batch=createNodeInternalsBatch(ids=>calls.push(ids),fn=>tasks.push(fn)),leases=Array.from({length:10000},(_,i)=>batch.acquire('n'+i));for(const lease of leases){lease.invalidate();lease.invalidate();}assert.equal(tasks.length,1);assert.equal(calls.length,0);tasks.shift()();assert.deepEqual(calls,[Array.from({length:10000},(_,i)=>'n'+i)]);for(const lease of leases)lease.dispose();
});
test('unmounted and replaced owners cannot retain or cancel another lease for the same node',()=>{
 const tasks=[],calls=[],batch=createNodeInternalsBatch(ids=>calls.push(ids),fn=>tasks.push(fn)),old=batch.acquire('A'),next=batch.acquire('A'),removed=batch.acquire('B');old.invalidate();next.invalidate();removed.invalidate();old.dispose();removed.dispose();old.invalidate();tasks.shift()();assert.deepEqual(calls,[['A']]);next.invalidate();next.dispose();tasks.shift()();assert.equal(calls.length,1);
});
test('renderer stores and later updates remain independent, including reentrant invalidation',()=>{
 const tasks=[],calls=[];let again;const one=createNodeInternalsBatch(ids=>{calls.push(['one',ids]);again?.();},fn=>tasks.push(fn)),two=createNodeInternalsBatch(ids=>calls.push(['two',ids]),fn=>tasks.push(fn)),a=one.acquire('A'),b=two.acquire('A');let reentered=false;again=()=>{if(!reentered){reentered=true;a.invalidate();}};a.invalidate();b.invalidate();assert.equal(tasks.length,2);tasks.shift()();assert.equal(tasks.length,2);tasks.shift()();tasks.shift()();assert.deepEqual(calls,[['one',['A']],['two',['A']],['one',['A']]]);a.dispose();b.dispose();
});