IndexedDB/idbcursor_advance_index.htm

<!DOCTYPE html>
<title>IDBCursor.advance() - index - iterate cursor number of times specified by count </title>
<link rel="author" title="Microsoft" href="http://www.microsoft.com">
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src=support.js></script>

<script>
    var db,
      count = 0,
      t = async_test(),
      records = [ { pKey: "primaryKey_0", iKey: "indexKey_0" },
                  { pKey: "primaryKey_1", iKey: "indexKey_1" },
                  { pKey: "primaryKey_2", iKey: "indexKey_2" },
                  { pKey: "primaryKey_3", iKey: "indexKey_3" }];

    var open_rq = createdb(t);
    open_rq.onupgradeneeded = function(e) {
        db = e.target.result;
        var store = db.createObjectStore("test", {keyPath:"pKey"});
        store.createIndex("idx", "iKey");

        for(var i = 0; i < records.length; i++) {
            store.add(records[i]);
        }
    };

    open_rq.onsuccess = function (e) {
        var cursor_rq = db.transaction("test")
                          .objectStore("test")
                          .index("idx")
                          .openCursor();

        cursor_rq.onsuccess = t.step_func(function(e) {
            var cursor = e.target.result;
            assert_true(cursor instanceof IDBCursor);

            switch(count) {
                case 0:
                    count += 3;
                    cursor.advance(3);
                    break;
                case 3:
                    var record = cursor.value;
                    assert_equals(record.pKey, records[count].pKey, "record.pKey");
                    assert_equals(record.iKey, records[count].iKey, "record.iKey");
                    t.done();
                    break;
                default:
                    assert_unreached("unexpected count");
                    break;
            }
        });
    }
</script>

<div id=log></div>