Bug 1866284 - Add tests for clearing the status panel when entering D…

…OM fullscreen (bug 1850993) and for not showing network status in DOM fullscreen (bug 1853896). r=mak

Differential Revision: https://phabricator.services.mozilla.com/D196436

browser/base/content/test/fullscreen/browser.toml

@@ -12,6 +12,8 @@ support-files = [
   "fullscreen_frame.html",
 ]
 
+["browser_domFS_statuspanel.js"]
+
 ["browser_fullscreen_api_fission.js"]
 https_first_disabled = true
 support-files = [

browser/base/content/test/fullscreen/browser_domFS_statuspanel.js

@@ -0,0 +1,95 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/* Tests that the status panel gets cleared when entering DOM fullscreen
+ * (bug 1850993), and that we don't show network statuses in DOM fullscreen
+ * (bug 1853896). */
+
+// DOM FS tests tends to trigger a race in the fullscreen time telemetry,
+// where the fullscreen enter and fullscreen exit events (which use the
+// same histogram ID) overlap. That causes TelemetryStopwatch to log an
+// error.
+SimpleTest.ignoreAllUncaughtExceptions(true);
+
+let statuspanel = document.getElementById("statuspanel");
+let statuspanelLabel = document.getElementById("statuspanel-label");
+
+async function withDomFsTab(beforeEnter, afterEnter) {
+  let url = "https://example.com/";
+  let tab = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser,
+    url,
+    true,
+    true
+  );
+  let browser = tab.linkedBrowser;
+
+  await beforeEnter();
+  info("Entering DOM fullscreen");
+  await changeFullscreen(browser, true);
+  is(document.fullscreenElement, browser, "Entered DOM fullscreen");
+  await afterEnter();
+
+  await BrowserTestUtils.removeTab(tab);
+}
+
+add_task(async function test_overlink() {
+  const overlink = "https://example.com";
+  let setAndCheckOverLink = async info => {
+    XULBrowserWindow.setOverLink(overlink);
+    await TestUtils.waitForCondition(
+      () => BrowserTestUtils.is_visible(statuspanel),
+      `statuspanel should become visible after setting overlink ${info}`
+    );
+    is(
+      statuspanelLabel.value,
+      BrowserUIUtils.trimURL(overlink),
+      `statuspanel has expected value after setting overlink ${info}`
+    );
+  };
+  await withDomFsTab(
+    async function () {
+      await setAndCheckOverLink("outside of DOM FS");
+    },
+    async function () {
+      await TestUtils.waitForCondition(
+        () => !BrowserTestUtils.is_visible(statuspanel),
+        "statuspanel with overlink should hide when entering DOM FS"
+      );
+      await setAndCheckOverLink("while in DOM FS");
+    }
+  );
+});
+
+add_task(async function test_networkstatus() {
+  await withDomFsTab(
+    async function () {
+      XULBrowserWindow.status = "test1";
+      XULBrowserWindow.busyUI = true;
+      StatusPanel.update();
+      ok(
+        BrowserTestUtils.is_visible(statuspanel),
+        "statuspanel is visible before entering DOM FS"
+      );
+      is(statuspanelLabel.value, "test1", "statuspanel has expected value");
+    },
+    async function () {
+      is(
+        XULBrowserWindow.busyUI,
+        true,
+        "browser window still considered busy (i.e. loading stuff) when entering DOM FS"
+      );
+      is(
+        XULBrowserWindow.status,
+        "",
+        "network status cleared when entering DOM FS"
+      );
+      ok(
+        !BrowserTestUtils.is_visible(statuspanel),
+        "statuspanel with network status should should hide when entering DOM FS"
+      );
+    }
+  );
+});