OOPIF: Move SequentialFocusNavigation test to interactive_ui_tests.

chrome/browser/site_per_process_interactive_browsertest.cc

 // Copyright 2016 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 "base/command_line.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/render_frame_host.h"
@@ skipping 126 matching lines @@
   SimulateKeyPress(web_contents, ui::VKEY_O, false, false, false, false);
   SimulateKeyPress(web_contents, ui::VKEY_O, false, false, false, false);
 
   // Verify that the input field in the subframe received the keystrokes.
   EXPECT_TRUE(ExecuteScriptAndExtractString(
       child,
       "window.domAutomationController.send(getInputFieldText());", &result));
   EXPECT_EQ("FOO", result);
 }
 
+// Ensure that sequential focus navigation (advancing focused elements with
+// <tab> and <shift-tab>) works across cross-process subframes.
+// The test sets up six inputs fields in a page with two cross-process
+// subframes:
+//                 child1            child2
+//             /------------\    /------------\.
+//             | 2. <input> |    | 4. <input> |
+//  1. <input> | 3. <input> |    | 5. <input> |  6. <input>
+//             \------------/    \------------/.
+//
+// The test then presses <tab> six times to cycle through focused elements 1-6.
+// The test then repeats this with <shift-tab> to cycle in reverse order.
+IN_PROC_BROWSER_TEST_F(SitePerProcessInteractiveBrowserTest,
+                       SequentialFocusNavigation) {
+  GURL main_url(embedded_test_server()->GetURL(
+      "a.com", "/cross_site_iframe_factory.html?a(b,c)"));
+  ui_test_utils::NavigateToURL(browser(), main_url);
+
+  content::WebContents* web_contents =
+      browser()->tab_strip_model()->GetActiveWebContents();
+
+  content::RenderFrameHost* main_frame = web_contents->GetMainFrame();
+  content::RenderFrameHost* child1 = ChildFrameAt(main_frame, 0);
+  ASSERT_NE(nullptr, child1);
+  content::RenderFrameHost* child2 = ChildFrameAt(main_frame, 1);
+  ASSERT_NE(nullptr, child2);
+
+  // Assign a name to each frame.  This will be sent along in test messages
+  // from focus events.
+  EXPECT_TRUE(ExecuteScript(main_frame, "window.name = 'root';"));
+  EXPECT_TRUE(ExecuteScript(child1, "window.name = 'child1';"));
+  EXPECT_TRUE(ExecuteScript(child2, "window.name = 'child2';"));
+
+  // This script will insert two <input> fields in the document, one at the
+  // beginning and one at the end.  For root frame, this means that we will
+  // have an <input>, then two <iframe> elements, then another <input>.
+  std::string script =
+      "function onFocus(e) {"
+      "  domAutomationController.setAutomationId(0);"
+      "  domAutomationController.send(window.name + '-focused-' + e.target.id);"
+      "}"
+      "var input1 = document.createElement('input');"
+      "input1.id = 'input1';"
+      "var input2 = document.createElement('input');"
+      "input2.id = 'input2';"
+      "document.body.insertBefore(input1, document.body.firstChild);"
+      "document.body.appendChild(input2);"
+      "input1.addEventListener('focus', onFocus, false);"
+      "input2.addEventListener('focus', onFocus, false);";
+
+  // Add two input fields to each of the three frames.
+  EXPECT_TRUE(ExecuteScript(main_frame, script));
+  EXPECT_TRUE(ExecuteScript(child1, script));
+  EXPECT_TRUE(ExecuteScript(child2, script));
+
+  // Helper to simulate a tab press and wait for a focus message.
+  auto press_tab_and_wait_for_message = [web_contents](bool reverse) {
+    content::DOMMessageQueue msg_queue;
+    std::string reply;
+    SimulateKeyPress(web_contents, ui::VKEY_TAB, false, reverse /* shift */,
+                     false, false);
+    EXPECT_TRUE(msg_queue.WaitForMessage(&reply));
+    return reply;
+  };
+
+  // Press <tab> six times to focus each of the <input> elements in turn.
+  EXPECT_EQ("\"root-focused-input1\"", press_tab_and_wait_for_message(false));
+  EXPECT_EQ(main_frame, web_contents->GetFocusedFrame());
+  EXPECT_EQ("\"child1-focused-input1\"", press_tab_and_wait_for_message(false));
+  EXPECT_EQ(child1, web_contents->GetFocusedFrame());
+  EXPECT_EQ("\"child1-focused-input2\"", press_tab_and_wait_for_message(false));
+  EXPECT_EQ("\"child2-focused-input1\"", press_tab_and_wait_for_message(false));
+  EXPECT_EQ(child2, web_contents->GetFocusedFrame());
+  EXPECT_EQ("\"child2-focused-input2\"", press_tab_and_wait_for_message(false));
+  EXPECT_EQ("\"root-focused-input2\"", press_tab_and_wait_for_message(false));
+  EXPECT_EQ(main_frame, web_contents->GetFocusedFrame());
+
+  // Now, press <shift-tab> to navigate focus in the reverse direction.
+  EXPECT_EQ("\"child2-focused-input2\"", press_tab_and_wait_for_message(true));
+  EXPECT_EQ(child2, web_contents->GetFocusedFrame());
+  EXPECT_EQ("\"child2-focused-input1\"", press_tab_and_wait_for_message(true));
+  EXPECT_EQ("\"child1-focused-input2\"", press_tab_and_wait_for_message(true));
+  EXPECT_EQ(child1, web_contents->GetFocusedFrame());
+  EXPECT_EQ("\"child1-focused-input1\"", press_tab_and_wait_for_message(true));
+  EXPECT_EQ("\"root-focused-input1\"", press_tab_and_wait_for_message(true));
+  EXPECT_EQ(main_frame, web_contents->GetFocusedFrame());
+}
+