<title>IDBCursor.advance() - index - attempt to advance backwards</title>

<link rel="author" href="mailto:[email protected]" title="Odin Hørthe Omdal">

<link rel=help href="http://dvcs.w3.org/hg/IndexedDB/raw-file/tip/Overview.html#widl-IDBCursor-advance-void-unsigned-long-count">

<link rel=assert title="The value passed into the count parameter was zero or a negative number.">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="resources/support.js"></script>

<script type="text/javascript">

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("test", { 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("test", "readonly", {durability: 'relaxed'})

.objectStore("test")

.index("index")

.openCursor(undefined, "next");

cursor_rq.onsuccess = t.step_func(function(e) {

var cursor = e.target.result;

assert_true(cursor != null, "cursor exist");

assert_throws_js(TypeError,

function() { cursor.advance(-1); });

t.done();

});

};

<div id="log"></div>