<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <script src="/js-test-resources/testharness.js"></script>
    <script src="/js-test-resources/testharnessreport.js"></script>
</head>
<body>
    <div id="log"></div>
    <div id="container"></div>
<script>

test(function() {
    assert_throws(new TypeError(), function() { new Notification(); });
}, "The Notification constructor requires at least one argument.");

test(function() {
    let notification = new Notification("test title");
    
    assert_class_string(notification, "Notification");
    assert_equals(notification.title, "test title");
    assert_equals(notification.dir, "auto");
    assert_equals(notification.lang, "");
    assert_equals(notification.body, "");
    assert_equals(notification.tag, "");
    assert_equals(notification.icon, "");
}, "The Notification object initializes its properties to their default values from the NotificationOptions dictionary if it is not provided.");

test(function() {
    let notification = new Notification("test title", {
        dir: "ltr",
        lang: "en",
        body: "test body",
        tag: "test tag",
        icon: "foo.png"
    });

    assert_equals(notification.title, "test title");
    assert_equals(notification.dir, "ltr");
    assert_equals(notification.lang, "en");
    assert_equals(notification.body, "test body");
    assert_equals(notification.tag, "test tag");
    assert_equals(notification.icon, "http://127.0.0.1:8000/notifications/foo.png");
}, "The Notification object initializes its properties to the values from NotificationOptions dictionary if it is provided.");

test(function() {
    let notification1 = new Notification("test title", { dir: "auto" });
    assert_equals(notification1.dir, "auto");

    let notification2 = new Notification("test title", { dir: "ltr" });
    assert_equals(notification2.dir, "ltr");

    let notification3 = new Notification("test title", { dir: "rtl" });
    assert_equals(notification3.dir, "rtl");

    assert_throws(new TypeError(), function() { new Notification("test title", { dir: "foo" }) });
}, "The NotificationOptions dictionary only accepts valid NotificationDirection values.");

</script>
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</html>