import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

browser/base/content/test/newtab/browser_newtab_disable.js

@@ -0,0 +1,49 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/*
+ * These tests make sure that the 'New Tab Page' feature can be disabled if the
+ * decides not to use it.
+ */
+add_task(function* () {
+  // create a new tab page and hide it.
+  yield setLinks("0,1,2,3,4,5,6,7,8");
+  setPinnedLinks("");
+
+  let firstTab = yield* addNewTabPageTab();
+
+  function isGridDisabled(browser = gBrowser.selectedBrowser)
+  {
+    return ContentTask.spawn(browser, {}, function*() {
+      return content.gGrid.node.hasAttribute("page-disabled");
+    });
+  }
+
+  let isDisabled = yield isGridDisabled();
+  ok(!isDisabled, "page is not disabled");
+
+  NewTabUtils.allPages.enabled = false;
+
+  isDisabled = yield isGridDisabled();
+  ok(isDisabled, "page is disabled");
+
+  // create a second new tab page and make sure it's disabled. enable it
+  // again and check if the former page gets enabled as well.
+  yield* addNewTabPageTab();
+  isDisabled = yield isGridDisabled(firstTab.linkedBrowser);
+  ok(isDisabled, "page is disabled");
+
+  // check that no sites have been rendered
+  yield ContentTask.spawn(gBrowser.selectedBrowser, {}, function*() {
+    Assert.equal(content.document.querySelectorAll(".site").length, 0,
+      "no sites have been rendered");
+  });
+
+  NewTabUtils.allPages.enabled = true;
+
+  isDisabled = yield isGridDisabled();
+  ok(!isDisabled, "page is not disabled");
+
+  isDisabled = yield isGridDisabled(firstTab.linkedBrowser);
+  ok(!isDisabled, "old page is not disabled");
+});