Implement initial support for nesting one ax tree in another.

content/browser/accessibility/frame_tree_accessibility_unittest.cc

+// Copyright (c) 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 "base/strings/string16.h"
+#include "base/strings/utf_string_conversions.h"
+#include "content/browser/accessibility/browser_accessibility.h"
+#include "content/browser/accessibility/browser_accessibility_manager.h"
+#include "content/browser/accessibility/frame_tree_accessibility.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace content {
+namespace {
+
+class TestBrowserAccessibilityDelegate
+    : public BrowserAccessibilityDelegate {
+ public:
+  virtual void AccessibilitySetFocus(int acc_obj_id) OVERRIDE {}
+  virtual void AccessibilityDoDefaultAction(int acc_obj_id) OVERRIDE {}
+  virtual void AccessibilityShowMenu(int acc_obj_id) OVERRIDE {}
+  virtual void AccessibilityScrollToMakeVisible(
+      int acc_obj_id, gfx::Rect subfocus) OVERRIDE {}
+  virtual void AccessibilityScrollToPoint(
+      int acc_obj_id, gfx::Point point) OVERRIDE {}
+  virtual void AccessibilitySetTextSelection(
+      int acc_obj_id, int start_offset, int end_offset) OVERRIDE {}
+  virtual bool AccessibilityViewHasFocus() const OVERRIDE {
+    return false;
+  }
+  virtual gfx::Rect AccessibilityGetViewBounds() const OVERRIDE {
+    return gfx::Rect();
+  }
+  virtual gfx::Point AccessibilityOriginInScreen(
+      const gfx::Rect& bounds) const OVERRIDE {
+    return gfx::Point();
+  }
+  virtual void AccessibilityFatalError() OVERRIDE {
+    LOG(FATAL) << "Fatal error, aborting test";
+  }
+};
+
+}  // anonymous namespace
+
+//
+// All of these tests use the same web page spanning two frames:
+//
+// Outer Frame:
+//
+//   1  AX_ROLE_ROOT_WEB_AREA
+//     2  AX_ROLE_IFRAME
+//
+// Inner Frame:
+//
+//       1  AX_ROLE_ROOT_WEB_AREA
+//         2  AX_ROLE_BUTTON
+//
+class FrameTreeAccessibilityTest : public testing::Test {
+ public:
+  FrameTreeAccessibilityTest();
+  virtual ~FrameTreeAccessibilityTest();
+
+ protected:
+  virtual void SetUp() OVERRIDE;
+  void LinkFrames();
+
+  TestBrowserAccessibilityDelegate outer_frame_;
+  TestBrowserAccessibilityDelegate inner_frame_;
+  scoped_ptr<BrowserAccessibilityManager> outer_manager_;
+  scoped_ptr<BrowserAccessibilityManager> inner_manager_;
+
+  DISALLOW_COPY_AND_ASSIGN(FrameTreeAccessibilityTest);
+};
+
+FrameTreeAccessibilityTest::FrameTreeAccessibilityTest() {
+}
+
+FrameTreeAccessibilityTest::~FrameTreeAccessibilityTest() {
+}
+
+void FrameTreeAccessibilityTest::SetUp() {
+  ui::AXNodeData outer_root;
+  outer_root.id = 1;
+  outer_root.role = ui::AX_ROLE_ROOT_WEB_AREA;
+  outer_root.state = 0;
+  outer_root.child_ids.push_back(2);
+
+  ui::AXNodeData outer_iframe;
+  outer_iframe.id = 2;
+  outer_iframe.role = ui::AX_ROLE_IFRAME;
+  outer_iframe.state = 0;
+
+  outer_manager_.reset(BrowserAccessibilityManager::Create(
+      MakeAXTreeUpdate(outer_root, outer_iframe), &outer_frame_));
+
+  ui::AXNodeData inner_root;
+  inner_root.id = 1;
+  inner_root.role = ui::AX_ROLE_ROOT_WEB_AREA;
+  inner_root.state = 0;
+  inner_root.child_ids.push_back(2);
+
+  ui::AXNodeData inner_button;
+  inner_button.id = 2;
+  inner_button.role = ui::AX_ROLE_BUTTON;
+  inner_button.state = 0;
+
+  inner_manager_.reset(BrowserAccessibilityManager::Create(
+      MakeAXTreeUpdate(inner_root, inner_button), &inner_frame_));
+
+  FrameTreeAccessibility* frames = FrameTreeAccessibility::GetInstance();
+  frames->OnFrameCreated(&outer_frame_);
+  frames->SetFrameAccessibilityManager(&outer_frame_, outer_manager_.get());
+  frames->OnFrameCreated(&inner_frame_);
+  frames->SetFrameAccessibilityManager(&inner_frame_, inner_manager_.get());
+}
+
+void FrameTreeAccessibilityTest::LinkFrames() {
+  FrameTreeAccessibility* frames = FrameTreeAccessibility::GetInstance();
+  BrowserAccessibility* outer_root = outer_manager_->GetRoot();
+  BrowserAccessibility* outer_iframe = outer_root->PlatformGetChild(0);
+  outer_iframe->SetChildFrameId(frames->GetFrameId(&inner_frame_));
+  inner_manager_->SetParentFrameIds(
+      frames->GetFrameId(&outer_frame_),
+      outer_iframe->GetId());
+}
+
+TEST_F(FrameTreeAccessibilityTest, GetChildAndGetParent) {
+  BrowserAccessibility* outer_root = outer_manager_->GetRoot();
+  BrowserAccessibility* outer_iframe = outer_root->PlatformGetChild(0);
+  ASSERT_EQ(0U, outer_iframe->PlatformChildCount());
+
+  LinkFrames();
+
+  ASSERT_EQ(1U, outer_iframe->PlatformChildCount());
+  BrowserAccessibility* inner_root = outer_iframe->PlatformGetChild(0);
+  ASSERT_EQ(ui::AX_ROLE_ROOT_WEB_AREA, inner_root->GetRole());
+
+  BrowserAccessibility* inner_root_parent = inner_root->GetParent();
+  ASSERT_EQ(inner_root_parent, outer_iframe);
+}
+
+TEST_F(FrameTreeAccessibilityTest, IsDescendantOf) {
+  LinkFrames();
+  BrowserAccessibility* outer_root = outer_manager_->GetRoot();
+  BrowserAccessibility* outer_iframe = outer_root->PlatformGetChild(0);
+  BrowserAccessibility* inner_root = inner_manager_->GetRoot();
+  BrowserAccessibility* inner_button = inner_root->PlatformGetChild(0);
+
+  EXPECT_TRUE(outer_iframe->IsDescendantOf(outer_root));
+  EXPECT_TRUE(inner_root->IsDescendantOf(outer_root));
+  EXPECT_TRUE(inner_button->IsDescendantOf(outer_root));
+  EXPECT_TRUE(inner_root->IsDescendantOf(outer_iframe));
+  EXPECT_TRUE(inner_button->IsDescendantOf(outer_iframe));
+
+  EXPECT_FALSE(outer_root->IsDescendantOf(outer_iframe));
+  EXPECT_FALSE(outer_root->IsDescendantOf(inner_root));
+  EXPECT_FALSE(outer_root->IsDescendantOf(inner_button));
+  EXPECT_FALSE(outer_iframe->IsDescendantOf(inner_root));
+  EXPECT_FALSE(outer_iframe->IsDescendantOf(inner_button));
+}
+
+TEST_F(FrameTreeAccessibilityTest, InnerFrameVanishing) {
+  BrowserAccessibility* outer_root = outer_manager_->GetRoot();
+  BrowserAccessibility* outer_iframe = outer_root->PlatformGetChild(0);
+  LinkFrames();
+
+  ASSERT_EQ(1U, outer_iframe->PlatformChildCount());
+  BrowserAccessibility* inner_root = outer_iframe->PlatformGetChild(0);
+  ASSERT_EQ(ui::AX_ROLE_ROOT_WEB_AREA, inner_root->GetRole());
+
+  FrameTreeAccessibility* frames = FrameTreeAccessibility::GetInstance();
+  frames->OnFrameDeleted(&inner_frame_);
+  inner_manager_.reset(NULL);
+
+  ASSERT_EQ(0U, outer_iframe->PlatformChildCount());
+}
+
+}  // namespace content