test_table_rollback.js

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/**

 * Any copyright is dedicated to the Public Domain.

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

*/

/* exported testGenerator */

var testGenerator = testSteps();

function* testSteps() {

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

  const objName1 = "foo";

  const objName2 = "bar";

  const data1 = "1234567890";

  const data2 = "0987654321";

  const dataCount = 500;

  let request = indexedDB.open(dbName, 1);

  request.onerror = errorHandler;

  request.onupgradeneeded = grabEventAndContinueHandler;

  let event = yield undefined;

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

  request.onupgradeneeded = errorHandler;

  request.onsuccess = grabEventAndContinueHandler;

  let db = request.result;

  let objectStore1 = db.createObjectStore(objName1, { autoIncrement: true });

  let objectStore2 = db.createObjectStore(objName2, { autoIncrement: true });

  info("Created object stores, adding data");

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

    objectStore1.add(data1);

    objectStore2.add(data2);

  info("Done adding data");

  event = yield undefined;

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

  let readResult = null;

  let readError = null;

  let writeAborted = false;

  info("Creating readwrite transaction");

  objectStore1 = db.transaction(objName1, "readwrite").objectStore(objName1);

  objectStore1.openCursor().onsuccess = grabEventAndContinueHandler;

  event = yield undefined;

  let cursor = event.target.result;

  is(cursor.value, data1, "Got correct data for readwrite transaction");

  info("Modifying object store on readwrite transaction");

  cursor.update(data2);

  cursor.continue();

  event = yield undefined;

  info(

    "Done modifying object store on readwrite transaction, creating " +

      "readonly transaction"

);

  objectStore2 = db.transaction(objName2, "readonly").objectStore(objName2);

  request = objectStore2.getAll();

  request.onsuccess = function (event) {

    readResult = event.target.result;

is(

      readResult.length,

      dataCount,

      "Got correct number of results on readonly transaction"

);

    for (let i = 0; i < readResult.length; i++) {

      is(readResult[i], data2, "Got correct data for readonly transaction");

    if (writeAborted) {

      continueToNextStep();

};

  request.onerror = function (event) {

    readResult = null;

    readError = event.target.error;

    ok(false, "Got read error: " + readError.name);

    event.preventDefault();

    if (writeAborted) {

      continueToNextStep();

};

  cursor = event.target.result;

  is(cursor.value, data1, "Got correct data for readwrite transaction");

  info("Aborting readwrite transaction");

  cursor.source.transaction.abort();

  writeAborted = true;

  if (!readError && !readResult) {

    info("Waiting for readonly transaction to complete");

    yield undefined;

  ok(readResult, "Got result from readonly transaction");

  is(readError, null, "No read error");

  is(writeAborted, true, "Aborted readwrite transaction");

  finishTest();