1 files changed, 85 insertions, 0 deletions
diff --git a/ext/wasm/test-opfs-vfs.js b/ext/wasm/test-opfs-vfs.js
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+++ b/ext/wasm/test-opfs-vfs.js
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+/*
+  2022-09-17
+
+  The author disclaims copyright to this source code.  In place of a
+  legal notice, here is a blessing:
+
+  *   May you do good and not evil.
+  *   May you find forgiveness for yourself and forgive others.
+  *   May you share freely, never taking more than you give.
+
+  ***********************************************************************
+
+  A testing ground for the OPFS VFS.
+*/
+'use strict';
+const tryOpfsVfs = async function(sqlite3){
+  const toss = function(...args){throw new Error(args.join(' '))};
+  const logPrefix = "OPFS tester:";
+  const log = (...args)=>console.log(logPrefix,...args);
+  const warn =  (...args)=>console.warn(logPrefix,...args);
+  const error =  (...args)=>console.error(logPrefix,...args);
+  const opfs = sqlite3.opfs;
+  log("tryOpfsVfs()");
+  if(!sqlite3.opfs){
+    const e = toss("OPFS is not available.");
+    error(e);
+    throw e;
+  }
+  const capi = sqlite3.capi;
+  const pVfs = capi.sqlite3_vfs_find("opfs") || toss("Missing 'opfs' VFS.");
+  const oVfs = capi.sqlite3_vfs.instanceForPointer(pVfs) || toss("Unexpected instanceForPointer() result.");;
+  log("OPFS VFS:",pVfs, oVfs);
+
+  const wait = async (ms)=>{
+    return new Promise((resolve)=>setTimeout(resolve, ms));
+  };
+
+  const urlArgs = new URL(self.location.href).searchParams;
+  const dbFile = "my-persistent.db";
+  if(urlArgs.has('delete')) sqlite3.opfs.unlink(dbFile);
+
+  const db = new opfs.OpfsDb(dbFile,'ct');
+  log("db file:",db.filename);
+  try{
+    if(opfs.entryExists(dbFile)){
+      let n = db.selectValue("select count(*) from sqlite_schema");
+      log("Persistent data found. sqlite_schema entry count =",n);
+    }
+    db.transaction((db)=>{
+      db.exec({
+        sql:[
+          "create table if not exists t(a);",
+          "insert into t(a) values(?),(?),(?);",
+        ],
+        bind: [performance.now() | 0,
+               (performance.now() |0) / 2,
+               (performance.now() |0) / 4]
+      });
+    });
+    log("count(*) from t =",db.selectValue("select count(*) from t"));
+
+    // Some sanity checks of the opfs utility functions...
+    const testDir = '/sqlite3-opfs-'+opfs.randomFilename(12);
+    const aDir = testDir+'/test/dir';
+    await opfs.mkdir(aDir) || toss("mkdir failed");
+    await opfs.mkdir(aDir) || toss("mkdir must pass if the dir exists");
+    await opfs.unlink(testDir+'/test') && toss("delete 1 should have failed (dir not empty)");
+    //await opfs.entryExists(testDir)
+    await opfs.unlink(testDir+'/test/dir') || toss("delete 2 failed");
+    await opfs.unlink(testDir+'/test/dir') && toss("delete 2b should have failed (dir already deleted)");
+    await opfs.unlink(testDir, true) || toss("delete 3 failed");
+    await opfs.entryExists(testDir) && toss("entryExists(",testDir,") should have failed");
+  }finally{
+    db.close();
+  }
+
+  log("Done!");
+}/*tryOpfsVfs()*/;
+
+importScripts('jswasm/sqlite3.js');
+self.sqlite3InitModule()
+  .then((sqlite3)=>tryOpfsVfs(sqlite3))
+  .catch((e)=>{
+    console.error("Error initializing module:",e);
+  });