Use setSequentialFocusNavigationStartingPoint in ChromeVox

chrome/browser/chromeos/accessibility/spoken_feedback_browsertest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <queue>
 
 #include "ash/common/accelerators/accelerator_controller.h"
 #include "ash/common/accelerators/accelerator_table.h"
 #include "ash/common/accessibility_types.h"
 #include "ash/common/system/tray/system_tray.h"
@@ skipping 604 matching lines @@
   ash::SystemTray* tray = ash::Shell::GetInstance()->GetPrimarySystemTray();
   tray->NotifyAccessibilityEvent(ui::AX_EVENT_HOVER, true);
 
   EXPECT_EQ("Status tray,", speech_monitor_.GetNextUtterance());
   EXPECT_TRUE(base::MatchPattern(speech_monitor_.GetNextUtterance(), "time*,"));
   EXPECT_TRUE(
       base::MatchPattern(speech_monitor_.GetNextUtterance(), "Battery*"));
   EXPECT_EQ("Button", speech_monitor_.GetNextUtterance());
 }
 
+IN_PROC_BROWSER_TEST_P(SpokenFeedbackTest, ChromeVoxNextTabRecovery) {
+  EnableChromeVox();
+
+  ui_test_utils::NavigateToURL(
+      browser(), GURL("data:text/html;charset=utf-8,"
+                      "<button id='b1' autofocus>11</button>"
+                      "<button>22</button>"
+                      "<button>33</button>"
+                      "<h1>Middle</h1>"
+                      "<button>44</button>"
+                      "<button>55</button>"
+                      "<div id=console aria-live=polite></div>"
+                      "<script>"
+                      "var b1 = document.getElementById('b1');"
+                      "b1.addEventListener('blur', function() {"
+                      "  document.getElementById('console').innerText = "
+                      "'button lost focus';"
+                      "});"
+                      "</script>"));
+  while ("Button" != speech_monitor_.GetNextUtterance()) {
+  }
+
+  // Press Search+H to go to the next heading
+  SendKeyPressWithSearch(ui::VKEY_H);
+  while ("Middle" != speech_monitor_.GetNextUtterance()) {
+  }
+
+  // To ensure that the setSequentialFocusNavigationStartingPoint has
+  // executed before pressing Tab, the page has an event handler waiting
+  // for the 'blur' event on the button, and when it loses focus it
+  // triggers a live region announcement that we wait for, here.
+  while ("button lost focus" != speech_monitor_.GetNextUtterance()) {
+  }
+
+  // Now we know that focus has left the button, so the sequential focus
+  // navigation starting point must be on the heading. Press Tab and
+  // ensure that we land on the first link past the heading.
+  SendKeyPress(ui::VKEY_TAB);
+  while ("44" != speech_monitor_.GetNextUtterance()) {
+  }
+}
+
 //
 // Spoken feedback tests that run only in guest mode.
 //
 
 class GuestSpokenFeedbackTest : public LoggedInSpokenFeedbackTest {
  protected:
   GuestSpokenFeedbackTest() {}
   ~GuestSpokenFeedbackTest() override {}
 
   void SetUpCommandLine(base::CommandLine* command_line) override {
@@ skipping 70 matching lines @@
   ASSERT_TRUE(ui_test_utils::SendKeyPressToWindowSync(
       window, ui::VKEY_TAB, false, true /*shift*/, false, false));
   while (speech_monitor_.GetNextUtterance() != "Select your language:") {
   }
   EXPECT_EQ("English ( United States)", speech_monitor_.GetNextUtterance());
   EXPECT_TRUE(base::MatchPattern(speech_monitor_.GetNextUtterance(),
                                  "Combo box * of *"));
 }
 
 }  // namespace chromeos