<!DOCTYPE html>
<html>
<body>
<script src="../../resources/runner.js"></script>
<script>

var iterationCount = 10;

// Delete all databases for the test ahead of time.
var databaseName = "objectstore-cursor-DB";
indexedDB.deleteDatabase(databaseName).onsuccess = function() {
    startIteration();
}

var testGenerator = null;
var db = null;
var currentIteration = 0;

PerfTestRunner.prepareToMeasureValuesAsync({
    customIterationCount: iterationCount,
    unit: 'ms',
    done: function () {
        db = null;
        testGenerator = null;
        PerfTestRunner.gc();
        ++currentIteration;
    }
});

function startIteration()
{
    testGenerator = runIteration();
    nextStep();
}

function nextStep()
{
    testGenerator.next();
}

function *runIteration()
{
    var openRequest = indexedDB.open(databaseName);
    openRequest.onupgradeneeded = function(event) {
        db = event.target.result;
        var objectStore = db.createObjectStore('store');
        for (var i = 0; i < 25000; ++i) {
            var suffix = ("0000000" + i).slice(-7);
            objectStore.put("bar_value_" + suffix, "foo_key_" + suffix);
        }
    }
    openRequest.onsuccess = nextStep;

    yield;

    var startTime = PerfTestRunner.now();
    var cursorRequest = db.transaction('store').objectStore('store').openCursor();
    var cursorIteration = 0;
    cursorRequest.onsuccess = function(event) {
        var cursor = event.target.result;
        if (cursor) {
            var suffix = ("0000000" + cursorIteration).slice(-7);
            if (cursor.key != "foo_key_" + suffix)
                alert("Incorrect value retrieved: " + cursor.key);
            if (cursor.value != "bar_value_" + suffix)
                alert("Incorrect value retrieved: " + cursor.key);
            ++cursorIteration;
            cursor.continue();
        } else
            nextStep();
    };

    yield;

    if (!PerfTestRunner.measureValueAsync(PerfTestRunner.now() - startTime))
        return;

    setTimeout(startIteration, 0);
}
</script>
</body>
</html>