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 /**

  * Any copyright is dedicated to the Public Domain.

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

  */

 var testGenerator = testSteps();

 function testSteps()

 {

   const name = this.window ? window.location.pathname : "Splendid Test";

   // Open a datbase for the first time.

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

   // Sanity checks

   ok(request instanceof IDBRequest, "Request should be an IDBRequest");

   ok(request instanceof IDBOpenDBRequest, "Request should be an IDBOpenDBRequest");

   //ok(request instanceof EventTarget, "Request should be an EventTarget");

   is(request.source, null, "Request should have no source");

   try {

     request.result;

     ok(false, "Getter should have thrown!");

   } catch (e if e.result == 0x80660006 /* NS_ERROR_DOM_INDEXEDDB_NOTALLOWED_ERR */) {

     ok(true, "Getter threw the right exception");

   }

   request.onerror = errorHandler;

   request.onsuccess = grabEventAndContinueHandler;

   let event = yield undefined;

   let versionChangeEventCount = 0;

   let db1, db2, db3;

   db1 = event.target.result;

   db1.addEventListener("versionchange", function(event) {

     ok(true, "Got version change event");

     ok(event instanceof IDBVersionChangeEvent, "Event is of the right type");

     is(event.target.source, null, "Correct source");

     is(event.target, db1, "Correct target");

     is(event.target.version, 1, "Correct db version");

     is(event.oldVersion, 1, "Correct event oldVersion");

     is(event.newVersion, 2, "Correct event newVersion");

     is(versionChangeEventCount++, 0, "Correct count");

     db1.close();

   }, false);

   // Open the database again and trigger an upgrade that should succeed

   request = indexedDB.open(name, 2);

   request.onerror = errorHandler;

   request.onsuccess = errorHandler;

   request.onupgradeneeded = grabEventAndContinueHandler;

   if (SpecialPowers.isMainProcess()) {

     request.onblocked = errorHandler;

   }

   else {

     todo(false, "Need to fix blocked events in child processes!");

   }

   event = yield undefined;

   // Test the upgradeneeded event.

   ok(event instanceof IDBVersionChangeEvent, "Event is of the right type");

   ok(event.target.result instanceof IDBDatabase, "Good result");

   db2 = event.target.result;

   is(event.target.transaction.mode, "versionchange",

      "Correct mode");

   is(db2.version, 2, "Correct db version");

   is(event.oldVersion, 1, "Correct event oldVersion");

   is(event.newVersion, 2, "Correct event newVersion");

   request.onupgradeneeded = errorHandler;

   request.onsuccess = grabEventAndContinueHandler;

   event = yield undefined;

   db2.addEventListener("versionchange", function(event) {

     ok(true, "Got version change event");

     ok(event instanceof IDBVersionChangeEvent, "Event is of the right type");

     is(event.target.source, null, "Correct source");

     is(event.target, db2, "Correct target");

     is(event.target.version, 2, "Correct db version");

     is(event.oldVersion, 2, "Correct event oldVersion");

     is(event.newVersion, 3, "Correct event newVersion");

     is(versionChangeEventCount++, 1, "Correct count");

   }, false);

   // Test opening the existing version again

   request = indexedDB.open(name, 2);

   request.onerror = errorHandler;

   request.onsuccess = grabEventAndContinueHandler;

   if (SpecialPowers.isMainProcess()) {

     request.onblocked = errorHandler;

   }

   else {

     todo(false, "Need to fix blocked events in child processes!");

   }

   event = yield undefined;

   db3 = event.target.result;

   // Test an upgrade that should fail

   request = indexedDB.open(name, 3);

   request.onerror = errorHandler;

   request.onsuccess = errorHandler;

   request.onupgradeneeded = errorHandler;

   request.onblocked = grabEventAndContinueHandler;

   event = yield undefined;

   ok(true, "Got version change blocked event");

   ok(event instanceof IDBVersionChangeEvent, "Event is of the right type");

   is(event.target.source, null, "Correct source");

   is(event.target.transaction, null, "Correct transaction");

   is(event.target, request, "Correct target");

   is(db3.version, 2, "Correct db version");

   is(event.oldVersion, 2, "Correct event oldVersion");

   is(event.newVersion, 3, "Correct event newVersion");

   versionChangeEventCount++;

   db2.close();

   db3.close();

   request.onupgradeneeded = grabEventAndContinueHandler;

   request.onsuccess = grabEventAndContinueHandler;

   event = yield undefined;

   event = yield undefined;

   db3 = event.target.result;

   db3.close();

   // Test another upgrade that should succeed.

   request = indexedDB.open(name, 4);

   request.onerror = errorHandler;

   request.onsuccess = errorHandler;

   request.onupgradeneeded = grabEventAndContinueHandler;

   if (SpecialPowers.isMainProcess()) {

     request.onblocked = errorHandler;

   }

   else {

     todo(false, "Need to fix blocked events in child processes!");

   }

   event = yield undefined;

   ok(event instanceof IDBVersionChangeEvent, "Event is of the right type");

   ok(event.target.result instanceof IDBDatabase, "Good result");

   is(event.target.transaction.mode, "versionchange",

      "Correct mode");

   is(event.oldVersion, 3, "Correct event oldVersion");

   is(event.newVersion, 4, "Correct event newVersion");

   request.onsuccess = grabEventAndContinueHandler;

   event = yield undefined;

   ok(event.target.result instanceof IDBDatabase, "Expect a database here");

   is(event.target.result.version, 4, "Right version");

   is(db3.version, 3, "After closing the version should not change!");

   is(db2.version, 2, "After closing the version should not change!");

   is(db1.version, 1, "After closing the version should not change!");

   is(versionChangeEventCount, 3, "Saw all expected events");

   event = new IDBVersionChangeEvent("versionchange");

   ok(event, "Should be able to create an event with just passing in the type");

   event = new IDBVersionChangeEvent("versionchange", {oldVersion: 1});

   ok(event, "Should be able to create an event with just the old version");

   is(event.oldVersion, 1, "Correct old version");

   is(event.newVersion, null, "Correct new version");

   event = new IDBVersionChangeEvent("versionchange", {newVersion: 1});

   ok(event, "Should be able to create an event with just the new version");

   is(event.oldVersion, 0, "Correct old version");

   is(event.newVersion, 1, "Correct new version");

   event = new IDBVersionChangeEvent("versionchange", {oldVersion: 1, newVersion: 2});

   ok(event, "Should be able to create an event with both versions");

   is(event.oldVersion, 1, "Correct old version");

   is(event.newVersion, 2, "Correct new version");

   finishTest();

   yield undefined;

 }