1 files changed, 59 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webstorage/storage_key.html b/testing/web-platform/tests/webstorage/storage_key.html
new file mode 100644
index 000000000..c70b536fb
--- /dev/null
+++ b/testing/web-platform/tests/webstorage/storage_key.html
@@ -0,0 +1,59 @@
+<!DOCTYPE HTML>
+<meta charset=utf-8>
+<title>WebStorage Test: Storage - key(index)</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<script>
+["localStorage", "sessionStorage"].forEach(function(name) {
+    test(function() {
+        var storage = window[name];
+        storage.clear();
+
+        storage.setItem("name", "user1");
+        storage.setItem("age", "20");
+        storage.setItem("a", "1");
+        storage.setItem("b", "2");
+
+        var keys = ["name", "age", "a", "b"];
+        function doTest(index) {
+            test(function() {
+                var key = storage.key(index);
+                assert_not_equals(key, null);
+                assert_true(keys.indexOf(key) >= 0,
+                            "Unexpected key " + key + " found.");
+            }, name + ".key(" + index + ") should return the right thing.");
+        }
+        for (var i = 0; i < keys.length; ++i) {
+            doTest(i);
+            doTest(i + 0x100000000);
+        }
+
+        test(function() {
+            assert_equals(storage.key(-1), null, "storage.key(-1)");
+            assert_equals(storage.key(4), null, "storage.key(4)");
+        }, name + ".key() should return null for out-of-range arguments.");
+    }, name + ".key");
+
+    test(function() {
+        var get_keys = function(s) {
+            var keys = [];
+            for (var i = 0; i < s.length; ++i) {
+                keys.push(s.key(i));
+            }
+            return keys;
+        };
+        var storage = window[name];
+        storage.clear();
+
+        storage.setItem("name", "user1");
+        storage.setItem("age", "20");
+        storage.setItem("a", "1");
+        storage.setItem("b", "2");
+
+        var expected_keys = get_keys(storage);
+        storage.setItem("name", "user2");
+        assert_array_equals(get_keys(storage), expected_keys);
+    }, name + ".key with value changes");
+});
+</script>