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86 lines
2.9 KiB
JavaScript
86 lines
2.9 KiB
JavaScript
/*
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2022-09-17
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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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A testing ground for the OPFS VFS.
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*/
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'use strict';
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const tryOpfsVfs = async function(sqlite3){
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const toss = function(...args){throw new Error(args.join(' '))};
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const logPrefix = "OPFS tester:";
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const log = (...args)=>console.log(logPrefix,...args);
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const warn = (...args)=>console.warn(logPrefix,...args);
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const error = (...args)=>console.error(logPrefix,...args);
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const opfs = sqlite3.opfs;
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log("tryOpfsVfs()");
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if(!sqlite3.opfs){
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const e = toss("OPFS is not available.");
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error(e);
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throw e;
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}
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const capi = sqlite3.capi;
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const pVfs = capi.sqlite3_vfs_find("opfs") || toss("Missing 'opfs' VFS.");
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const oVfs = new capi.sqlite3_vfs(pVfs);
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log("OPFS VFS:",pVfs, oVfs);
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const wait = async (ms)=>{
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return new Promise((resolve)=>setTimeout(resolve, ms));
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};
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const urlArgs = new URL(self.location.href).searchParams;
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const dbFile = "my-persistent.db";
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if(urlArgs.has('delete')) sqlite3.opfs.unlink(dbFile);
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const db = new sqlite3.oo1.OpfsDb(dbFile,'ct');
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log("db file:",db.filename);
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try{
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if(opfs.entryExists(dbFile)){
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let n = db.selectValue("select count(*) from sqlite_schema");
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log("Persistent data found. sqlite_schema entry count =",n);
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}
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db.transaction((db)=>{
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db.exec({
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sql:[
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"create table if not exists t(a);",
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"insert into t(a) values(?),(?),(?);",
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],
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bind: [performance.now() | 0,
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(performance.now() |0) / 2,
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(performance.now() |0) / 4]
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});
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});
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log("count(*) from t =",db.selectValue("select count(*) from t"));
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// Some sanity checks of the opfs utility functions...
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const testDir = '/sqlite3-opfs-'+opfs.randomFilename(12);
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const aDir = testDir+'/test/dir';
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await opfs.mkdir(aDir) || toss("mkdir failed");
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await opfs.mkdir(aDir) || toss("mkdir must pass if the dir exists");
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await opfs.unlink(testDir+'/test') && toss("delete 1 should have failed (dir not empty)");
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//await opfs.entryExists(testDir)
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await opfs.unlink(testDir+'/test/dir') || toss("delete 2 failed");
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await opfs.unlink(testDir+'/test/dir') && toss("delete 2b should have failed (dir already deleted)");
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await opfs.unlink(testDir, true) || toss("delete 3 failed");
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await opfs.entryExists(testDir) && toss("entryExists(",testDir,") should have failed");
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}finally{
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db.close();
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}
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log("Done!");
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}/*tryOpfsVfs()*/;
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importScripts('jswasm/sqlite3.js');
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self.sqlite3InitModule()
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.then((sqlite3)=>tryOpfsVfs(sqlite3))
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.catch((e)=>{
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console.error("Error initializing module:",e);
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});
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