test_table_locks.js

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/**

 * Any copyright is dedicated to the Public Domain.

 * http://creativecommons.org/publicdomain/zero/1.0/

*/

const dbName = "window" in this ? window.location.pathname : "test";

const dbVersion = 1;

const objName1 = "o1";

const objName2 = "o2";

const idxName1 = "i1";

const idxName2 = "i2";

const idxKeyPathProp = "idx";

const objDataProp = "data";

const objData = "1234567890";

const objDataCount = 5;

const loopCount = 100;

/* exported testGenerator */

var testGenerator = testSteps();

function* testSteps() {

  let req = indexedDB.open(dbName, dbVersion);

  req.onerror = errorHandler;

  req.onupgradeneeded = grabEventAndContinueHandler;

  req.onsuccess = grabEventAndContinueHandler;

  let event = yield undefined;

  is(event.type, "upgradeneeded", "Got upgradeneeded event");

  let db = event.target.result;

  let objectStore1 = db.createObjectStore(objName1);

  objectStore1.createIndex(idxName1, idxKeyPathProp);

  let objectStore2 = db.createObjectStore(objName2);

  objectStore2.createIndex(idxName2, idxKeyPathProp);

  for (let i = 0; i < objDataCount; i++) {

    var data = {};

    data[objDataProp] = objData;

    data[idxKeyPathProp] = objDataCount - i - 1;

    objectStore1.add(data, i);

    objectStore2.add(data, i);

  event = yield undefined;

  is(event.type, "success", "Got success event");

  doReadOnlyTransaction(db, 0, loopCount);

  doReadWriteTransaction(db, 0, loopCount);

  // Wait for readonly and readwrite transaction loops to complete.

  yield undefined;

  yield undefined;

  finishTest();

function doReadOnlyTransaction(db, key, remaining) {

  if (!remaining) {

    info("Finished all readonly transactions");

    continueToNextStep();

    return;

  info(

    "Starting readonly transaction for key " +

      key +

      ", " +

      remaining +

      " loops left"

);

  let objectStore = db.transaction(objName1, "readonly").objectStore(objName1);

  let index = objectStore.index(idxName1);

  index.openKeyCursor(key, "prev").onsuccess = function (event) {

    let cursor = event.target.result;

    ok(cursor, "Got readonly cursor");

    objectStore.get(cursor.primaryKey).onsuccess = function () {

      if (++key == objDataCount) {

        key = 0;

      doReadOnlyTransaction(db, key, remaining - 1);

};

};

function doReadWriteTransaction(db, key, remaining) {

  if (!remaining) {

    info("Finished all readwrite transactions");

    continueToNextStep();

    return;

  info(

    "Starting readwrite transaction for key " +

      key +

      ", " +

      remaining +

      " loops left"

);

  let objectStore = db.transaction(objName2, "readwrite").objectStore(objName2);

  objectStore.openCursor(key).onsuccess = function (event) {

    let cursor = event.target.result;

    ok(cursor, "Got readwrite cursor");

    let value = cursor.value;

    value[idxKeyPathProp]++;

    cursor.update(value).onsuccess = function () {

      if (++key == objDataCount) {

        key = 0;

      doReadWriteTransaction(db, key, remaining - 1);

};

};