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Retry transient foreground requests before surfacing errors

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This commit is contained in:
Jonathan Sykes
2026-10-09 21:53:03 +08:00
parent 933e920701
commit d02796b0eb
10 changed files with 282 additions and 26 deletions
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12
frontend/lazy.test.js
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@@ -7,7 +7,7 @@ function fixture(current, held = [], appCache = false, userAgent = 'AppleWebKit/
const manifest = { buildTag: 'own', appCache, groups: { core: { files: [] }, 'layout:classic': { files: ['/classic.css'] }, 'layout:glass-stage': { files: ['/glass.css', '/one.js', '/two.js'] }, 'feature:test': { contract:1, files: ['/one.js', '/two.js'] } }, files: { '/app.js':{h:'a'}, '/classic.css': {h:'c'}, '/glass.css':{h:'g'}, '/one.js':{h:'1'}, '/two.js':{h:'2'} } };
const doc = { readyState:'loading', documentElement: { dataset:{} }, getElementById: () => ({ textContent:JSON.stringify(manifest) }), querySelectorAll: () => [], createElement: tag => ({ tagName:tag.toUpperCase() }), write: value => writes.push(value), addEventListener: (t,f) => listeners[t]=f };
doc.head = { append: node => { inserted.push(node); queueMicrotask(() => node.onload?.()); } };
const root = { document:doc, localStorage:{ getItem:() => '{"settings":{"layout":"glass-stage"}}' }, console, Promise, URL, crypto:{subtle:{}}, fetch:async key=>{fetched.push(key);return new Response('app');}, setTimeout, clearTimeout, navigator:{userAgent,serviceWorker:{ready:Promise.resolve({}),controller:controlled?{}:null,addEventListener(){}}}, addEventListener(){} };
const root = { document:doc, localStorage:{ getItem:() => '{"settings":{"layout":"glass-stage"}}' }, console, Promise, URL, crypto:{subtle:{}}, AsyncGuard:require('./async-guard'), requestIdleCallback:fn=>{root.__idle=fn;}, fetch:async key=>{fetched.push(key);return new Response('app');}, setTimeout, clearTimeout, navigator:{userAgent,serviceWorker:{ready:Promise.resolve({}),controller:controlled?{}:null,addEventListener(){}}}, addEventListener(){} };
if (current) root.caches = { open: async () => ({ match: async key => key === '/__ytp_asset_state' ? new Response(JSON.stringify({current})) : held.includes(key) ? new Response('', {headers:{'X-Asset-Hash':key.split('=')[1]}}) : undefined }) };
root.window=root; root.globalThis=root;
vm.runInNewContext(readFileSync(require.resolve('./lazy.js'),'utf8'), root);
@@ -27,11 +27,13 @@ test('lazy groups execute ordered classic scripts once, sharing concurrent calls
await root.Lazy.load('layout:glass-stage');
assert.equal(inserted.filter(n=>n.tagName==='SCRIPT').length,2);
});
test('failed injection can retry and proxy dispatches only after execution', async () => {
test('transient script injection failure retries before proxy dispatch', async () => {
const {root,inserted}=fixture();
const append=root.document.head.append;
root.document.head.append=n=>{inserted.push(n);queueMicrotask(()=>n.onerror?.());};
await assert.rejects(root.Lazy.load('feature:test'),/one.js/);
let first=true;
root.document.head.append=n=>{inserted.push(n);queueMicrotask(()=>{if(first){first=false;n.onerror?.();}else n.onload?.();});};
await root.Lazy.load('feature:test');
assert.equal(inserted.length,3,'first file is retried, then the second file loads');
root.document.head.append=append;
root.TestApi={open:value=>value+1};
const proxy=root.Lazy.proxy('feature:test',['open'],'TestApi');
@@ -92,6 +94,8 @@ test('online launches request worker completion even with Save-Data and skip off
f.root.navigator.connection={saveData:true};f.root.navigator.onLine=true;
f.root.navigator.serviceWorker={ready:Promise.resolve({active,waiting})};
f.root.Lazy.warm();await Promise.resolve();
assert.equal(sent.length,0,'warming waits until the page is idle');
f.root.__idle();await Promise.resolve();
assert.deepEqual(sent.map(m=>m.type),['COMPLETE_ASSETS','COMPLETE_ASSETS']);
f.root.navigator.onLine=false;f.root.Lazy.warm();await Promise.resolve();assert.equal(sent.length,2);
});