storage_enumerate.window.js

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

["localStorage", "sessionStorage"].forEach(function(name) {

    test(function() {

        assert_true(name in window, name + " exist");

        var storage = window[name];

        storage.clear();

        Storage.prototype.prototypeTestKey = "prototypeTestValue";

        storage.foo = "bar";

        storage.fu = "baz";

        storage.batman = "bin suparman";

        storage.bar = "foo";

        storage.alpha = "beta";

        storage.zeta = "gamma";

        const enumeratedArray = Object.keys(storage);

        enumeratedArray.sort();  // Storage order is implementation-defined.

        const expectArray = ["alpha", "bar", "batman", "foo", "fu", "zeta"];

        assert_array_equals(enumeratedArray, expectArray);

        // 'prototypeTestKey' is not an actual storage key, it is just a

        // property set on Storage's prototype object.

        assert_equals(storage.length, 6);

        assert_equals(storage.getItem("prototypeTestKey"), null);

        assert_equals(storage.prototypeTestKey, "prototypeTestValue");

    }, name + ": enumerate a Storage object and get only the keys as a result and the built-in properties of the Storage object should be ignored");

    test(function() {

        const storage = window[name];

        storage.clear();

        storage.setItem("foo", "bar");

        storage.baz = "quux";

        storage.setItem(0, "alpha");

        storage[42] = "beta";

        for (let prop in storage) {

            if (!storage.hasOwnProperty(prop))

                continue;

            const desc = Object.getOwnPropertyDescriptor(storage, prop);

            assert_true(desc.configurable);

            assert_true(desc.enumerable);

            assert_true(desc.writable);

        const keys = Object.keys(storage);

        keys.sort();  // Storage order is implementation-defined.

        assert_array_equals(keys, ["0", "42", "baz", "foo"]);

        const values = Object.values(storage);

        values.sort();  // Storage order is implementation-defined.

        assert_array_equals(values, ["alpha", "bar", "beta", "quux"]);

    }, name + ": test enumeration of numeric and non-numeric keys");

});