import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

devtools/client/shared/components/test/browser/.eslintrc.js

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+"use strict";
+
+module.exports = {
+  // Extend from the shared list of defined globals for mochitests.
+  "extends": "../../../../../.eslintrc.mochitests.js",
+};

devtools/client/shared/components/test/browser/browser.ini

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+[DEFAULT]
+tags = devtools
+subsuite = devtools
+support-files =
+  !/devtools/client/framework/test/shared-head.js
+
+[browser_notification_box_basic.js]

devtools/client/shared/components/test/browser/browser_notification_box_basic.js

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+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/* import-globals-from ../../../../framework/test/shared-head.js */
+
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/devtools/client/framework/test/shared-head.js", this);
+
+const TEST_URI = "data:text/html;charset=utf-8,Test page";
+
+/**
+ * Basic test that checks existence of the Notification box.
+ */
+add_task(function* () {
+  info("Test Notification box basic started");
+
+  let toolbox = yield openNewTabAndToolbox(TEST_URI, "webconsole");
+
+  // Append a notification
+  let notificationBox = toolbox.getNotificationBox();
+  notificationBox.appendNotification(
+    "Info message",
+    "id1",
+    null,
+    notificationBox.PRIORITY_INFO_HIGH
+  );
+
+  // Verify existence of one notification.
+  let parentNode = toolbox.doc.getElementById("toolbox-notificationbox");
+  let nodes = parentNode.querySelectorAll(".notification");
+  is(nodes.length, 1, "There must be one notification");
+});