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Add a small test app demonstrating cooperative semi-concurrency of the opfs-sahpool VFS using its un/pauseVfs() APIs.
FossilOrigin-Name: 09570c55a23e5af76dd2153a5b28a493f498d7d4a08b0089f3074d0a2c5d3d29
This commit is contained in:
172
ext/wasm/tests/opfs/sahpool/sahpool-pausing.js
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172
ext/wasm/tests/opfs/sahpool/sahpool-pausing.js
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/*
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2022-10-12
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The author disclaims copyright to this source code. In place of a
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legal notice, here is a blessing:
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* May you do good and not evil.
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* May you find forgiveness for yourself and forgive others.
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* May you share freely, never taking more than you give.
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***********************************************************************
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These tests are specific to the opfs-sahpool VFS and are limited to
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demonstrating its pause/unpause capabilities.
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*/
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'use strict';
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(function(self){
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let logClass;
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const mapToString = (v)=>{
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switch(typeof v){
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case 'number': case 'string': case 'boolean':
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case 'undefined': case 'bigint':
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return ''+v;
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default: break;
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}
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if(null===v) return 'null';
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if(v instanceof Error){
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v = {
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message: v.message,
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stack: v.stack,
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errorClass: v.name
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};
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}
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return JSON.stringify(v,undefined,2);
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};
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const normalizeArgs = (args)=>args.map(mapToString);
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console.log("Running in the UI thread.");
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const logTarget = document.querySelector('#test-output');
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logClass = function(cssClass,...args){
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const ln = document.createElement('div');
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if(cssClass){
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for(const c of (Array.isArray(cssClass) ? cssClass : [cssClass])){
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ln.classList.add(c);
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}
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}
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ln.append(document.createTextNode(normalizeArgs(args).join(' ')));
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logTarget.append(ln);
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};
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const cbReverse = document.querySelector('#cb-log-reverse');
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//cbReverse.setAttribute('checked','checked');
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const cbReverseKey = 'tester1:cb-log-reverse';
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const cbReverseIt = ()=>{
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logTarget.classList[cbReverse.checked ? 'add' : 'remove']('reverse');
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//localStorage.setItem(cbReverseKey, cbReverse.checked ? 1 : 0);
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};
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cbReverse.addEventListener('change', cbReverseIt, true);
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/*if(localStorage.getItem(cbReverseKey)){
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cbReverse.checked = !!(+localStorage.getItem(cbReverseKey));
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}*/
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cbReverseIt();
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const log = (...args)=>{
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//console.log(...args);
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logClass('',...args);
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}
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const warn = (...args)=>{
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console.warn(...args);
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logClass('warning',...args);
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}
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const error = (...args)=>{
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console.error(...args);
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logClass('error',...args);
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};
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const toss = (...args)=>{
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error(...args);
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throw new Error(args.join(' '));
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};
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const nextHandlerQueue = [];
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const endOfWork = (passed=true)=>{
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const eH = document.querySelector('#color-target');
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const eT = document.querySelector('title');
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if(passed){
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log("End of work chain. If you made it this far, you win.");
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eH.innerText = 'PASS: '+eH.innerText;
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eH.classList.add('tests-pass');
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eT.innerText = 'PASS: '+eT.innerText;
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}else{
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eH.innerText = 'FAIL: '+eH.innerText;
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eH.classList.add('tests-fail');
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eT.innerText = 'FAIL: '+eT.innerText;
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}
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};
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const nextHandler = function(workerId,...msg){
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log(workerId,...msg);
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(nextHandlerQueue.shift())();
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};
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const postThen = function(W, msgType, callback){
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nextHandlerQueue.push(callback);
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W.postMessage({type:msgType});
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};
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const runTriangleOfDeath = function(W1, W2){
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postThen(W1, 'vfs-acquire', function(){
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postThen(W1, 'db-init', function(){
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postThen(W1, 'db-query', function(){
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postThen(W1, 'vfs-pause', function(){
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postThen(W2, 'vfs-acquire', function(){
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postThen(W2, 'db-query', function(){
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postThen(W2, 'vfs-remove', endOfWork);
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});
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});
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});
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});
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});
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});
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};
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const runTests = function(){
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log("Running sahpool pausing tests...");
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const wjs = 'sahpool-worker.js?sqlite3.dir=../../../jswasm';
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const W1 = new Worker(wjs+'&workerId=w1'),
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W2 = new Worker(wjs+'&workerId=w2');
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W1.workerId = 'w1';
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W2.workerId = 'w2';
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let initCount = 0;
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const onmessage = function({data}){
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//log("onmessage:",data);
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switch(data.type){
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case 'vfs-acquired':
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nextHandler(data.workerId, "VFS acquired");
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break;
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case 'vfs-paused':
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nextHandler(data.workerId, "VFS paused");
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break;
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case 'vfs-unpaused':
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nextHandler(data.workerId, 'VFS unpaused');
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break;
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case 'vfs-removed':
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nextHandler(data.workerId, 'VFS removed');
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break;
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case 'db-inited':
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nextHandler(data.workerId, 'db initialized');
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break;
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case 'query-result':
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nextHandler(data.workerId, 'query result', data.payload);
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break;
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case 'log':
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log(data.workerId, ':', ...data.payload);
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break;
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case 'error':
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error(data.workerId, ':', ...data.payload);
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endOfWork(false);
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break;
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case 'initialized':
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log(data.workerId, ': Worker initialized',...data.payload);
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if( 2===++initCount ){
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runTriangleOfDeath(W1, W2);
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}
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break;
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}
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};
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W1.onmessage = W2.onmessage = onmessage;
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};
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runTests();
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})(globalThis);
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