<!DOCTYPE html>
<title>IDBCursor.update() - index - throw InvalidStateError when the cursor is being iterated</title>
<link rel="author" title="Mozilla" href="https://www.mozilla.org">
<link rel="help" href="https://www.w3.org/TR/IndexedDB/#widl-IDBCursor-update-IDBRequest-any-value">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support.js"></script>
<div id="log"></div>
<script>
    var db,
        t = async_test(),
        records = [ { pKey: "primaryKey_0", iKey: "indexKey_0" },
                    { pKey: "primaryKey_1", iKey: "indexKey_1" } ];

    var open_rq = createdb(t);
    open_rq.onupgradeneeded = function(e) {
        db = e.target.result;

        var objStore = db.createObjectStore("store", { keyPath: "pKey" });
        objStore.createIndex("index", "iKey");

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

    open_rq.onsuccess = function(e) {
        var cursor_rq = db.transaction("store", "readwrite")
                          .objectStore("store")
                          .index("index")
                          .openCursor();

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

            cursor.continue();
            assert_throws("InvalidStateError", function() {
                cursor.update({ pKey: "primaryKey_0", iKey: "indexKey_0_updated" });
            });

            t.done();
        });
    }
</script>