storage_key.window.js

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This WPT test may be referenced by the following Test IDs:
- /webstorage/storage_key.window.html - WPT Dashboard Interop Dashboard

["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");

});