Re-land: Implement NativeViewAccessibilityWin using AXPlatformNodeWin.

ui/accessibility/platform/ax_platform_node_win_unittest.cc

+// Copyright 2015 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 <atlbase.h>
+#include <atlcom.h>
+#include <oleacc.h>
+
+#include "base/memory/scoped_ptr.h"
+#include "base/win/scoped_bstr.h"
+#include "base/win/scoped_comptr.h"
+#include "base/win/scoped_variant.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/iaccessible2/ia2_api_all.h"
+#include "ui/accessibility/ax_node_data.h"
+#include "ui/accessibility/platform/ax_platform_node.h"
+#include "ui/accessibility/platform/test_ax_node_wrapper.h"
+#include "ui/base/win/atl_module.h"
+
+using base::win::ScopedBstr;
+using base::win::ScopedComPtr;
+using base::win::ScopedVariant;
+
+namespace ui {
+
+namespace {
+
+// Most IAccessible functions require a VARIANT set to CHILDID_SELF as
+// the first argument.
+ScopedVariant SELF(CHILDID_SELF);
+
+}  // namespace
+
+class AXPlatformNodeWinTest : public testing::Test {
+ public:
+  AXPlatformNodeWinTest() {}
+  virtual ~AXPlatformNodeWinTest() {}
+
+  void SetUp() override {
+    win::CreateATLModuleIfNeeded();
+  }
+
+  // Initialize given an AXTreeUpdate.
+  void Init(const AXTreeUpdate& initial_state) {
+    tree_.reset(new AXTree(initial_state));
+  }
+
+  // Convenience functions to initialize directly from a few AXNodeDatas.
+  void Init(const AXNodeData& node1) {
+    AXTreeUpdate update;
+    update.nodes.push_back(node1);
+    Init(update);
+  }
+
+  void Init(const AXNodeData& node1,
+            const AXNodeData& node2) {
+    AXTreeUpdate update;
+    update.nodes.push_back(node1);
+    update.nodes.push_back(node2);
+    Init(update);
+  }
+
+  void Init(const AXNodeData& node1,
+            const AXNodeData& node2,
+            const AXNodeData& node3) {
+    AXTreeUpdate update;
+    update.nodes.push_back(node1);
+    update.nodes.push_back(node2);
+    update.nodes.push_back(node3);
+    Init(update);
+  }
+
+ protected:
+  AXNode* GetRootNode() {
+    return tree_->GetRoot();
+  }
+
+  ScopedComPtr<IAccessible> IAccessibleFromNode(AXNode* node) {
+    TestAXNodeWrapper* wrapper =
+        TestAXNodeWrapper::GetOrCreate(tree_.get(), node);
+    AXPlatformNode* ax_platform_node = wrapper->ax_platform_node();
+    IAccessible* iaccessible = ax_platform_node->GetNativeViewAccessible();
+    iaccessible->AddRef();
+    return ScopedComPtr<IAccessible>(iaccessible);
+  }
+
+  ScopedComPtr<IAccessible> GetRootIAccessible() {
+    return IAccessibleFromNode(GetRootNode());
+  }
+
+  ScopedComPtr<IAccessible2> ToIAccessible2(
+      ScopedComPtr<IAccessible> accessible) {
+    ScopedComPtr<IServiceProvider> service_provider;
+    service_provider.QueryFrom(accessible.get());
+    ScopedComPtr<IAccessible2> result;
+    CHECK(SUCCEEDED(
+        service_provider->QueryService(IID_IAccessible2, result.Receive())));
+    return result;
+  }
+
+  scoped_ptr<AXTree> tree_;
+};
+
+TEST_F(AXPlatformNodeWinTest, TestIAccessibleDetachedObject) {
+  AXNodeData root;
+  root.id = 1;
+  root.role = AX_ROLE_ROOT_WEB_AREA;
+  root.AddStringAttribute(AX_ATTR_NAME, "Name");
+  Init(root);
+
+  ScopedComPtr<IAccessible> root_obj(GetRootIAccessible());
+  ScopedBstr name;
+  ASSERT_EQ(S_OK, root_obj->get_accName(SELF, name.Receive()));
+  EXPECT_EQ(L"Name", base::string16(name));
+
+  tree_.reset(new AXTree());
+  ScopedBstr name2;
+  ASSERT_EQ(E_FAIL, root_obj->get_accName(SELF, name2.Receive()));
+}
+
+TEST_F(AXPlatformNodeWinTest, TestIAccessibleName) {
+  AXNodeData root;
+  root.id = 1;
+  root.role = AX_ROLE_ROOT_WEB_AREA;
+  root.AddStringAttribute(AX_ATTR_NAME, "Name");
+  Init(root);
+
+  ScopedComPtr<IAccessible> root_obj(GetRootIAccessible());
+  ScopedBstr name;
+  ASSERT_EQ(S_OK, root_obj->get_accName(SELF, name.Receive()));
+  EXPECT_EQ(L"Name", base::string16(name));
+
+  ASSERT_EQ(E_INVALIDARG, root_obj->get_accName(SELF, NULL));
+  ScopedVariant bad_id(999);
+  ScopedBstr name2;
+  ASSERT_EQ(E_INVALIDARG, root_obj->get_accName(bad_id, name2.Receive()));
+}
+
+TEST_F(AXPlatformNodeWinTest, TestIAccessibleDescription) {
+  AXNodeData root;
+  root.id = 1;
+  root.role = AX_ROLE_ROOT_WEB_AREA;
+  root.AddStringAttribute(AX_ATTR_DESCRIPTION, "Description");
+  Init(root);
+
+  ScopedComPtr<IAccessible> root_obj(GetRootIAccessible());
+  ScopedBstr description;
+  ASSERT_EQ(S_OK, root_obj->get_accDescription(SELF, description.Receive()));
+  EXPECT_EQ(L"Description", base::string16(description));
+
+  ASSERT_EQ(E_INVALIDARG, root_obj->get_accDescription(SELF, NULL));
+  ScopedVariant bad_id(999);
+  ScopedBstr d2;
+  ASSERT_EQ(E_INVALIDARG, root_obj->get_accDescription(bad_id, d2.Receive()));
+}
+
+TEST_F(AXPlatformNodeWinTest, TestIAccessibleHelp) {
+  AXNodeData root;
+  root.id = 1;
+  root.role = AX_ROLE_ROOT_WEB_AREA;
+  root.AddStringAttribute(AX_ATTR_HELP, "Help");
+  Init(root);
+
+  ScopedComPtr<IAccessible> root_obj(GetRootIAccessible());
+  ScopedBstr help;
+  ASSERT_EQ(S_OK, root_obj->get_accHelp(SELF, help.Receive()));
+  EXPECT_EQ(L"Help", base::string16(help));
+
+  ASSERT_EQ(E_INVALIDARG, root_obj->get_accHelp(SELF, NULL));
+  ScopedVariant bad_id(999);
+  ScopedBstr h2;
+  ASSERT_EQ(E_INVALIDARG, root_obj->get_accHelp(bad_id, h2.Receive()));
+}
+
+TEST_F(AXPlatformNodeWinTest, TestIAccessibleValue) {
+  AXNodeData root;
+  root.id = 1;
+  root.role = AX_ROLE_ROOT_WEB_AREA;
+  root.AddStringAttribute(AX_ATTR_VALUE, "Value");
+  Init(root);
+
+  ScopedComPtr<IAccessible> root_obj(GetRootIAccessible());
+  ScopedBstr value;
+  ASSERT_EQ(S_OK, root_obj->get_accValue(SELF, value.Receive()));
+  EXPECT_EQ(L"Value", base::string16(value));
+
+  ASSERT_EQ(E_INVALIDARG, root_obj->get_accValue(SELF, NULL));
+  ScopedVariant bad_id(999);
+  ScopedBstr v2;
+  ASSERT_EQ(E_INVALIDARG, root_obj->get_accValue(bad_id, v2.Receive()));
+}
+
+TEST_F(AXPlatformNodeWinTest, TestIAccessibleShortcut) {
+  AXNodeData root;
+  root.id = 1;
+  root.role = AX_ROLE_ROOT_WEB_AREA;
+  root.AddStringAttribute(AX_ATTR_SHORTCUT, "Shortcut");
+  Init(root);
+
+  ScopedComPtr<IAccessible> root_obj(GetRootIAccessible());
+  ScopedBstr shortcut;
+  ASSERT_EQ(S_OK, root_obj->get_accKeyboardShortcut(
+      SELF, shortcut.Receive()));
+  EXPECT_EQ(L"Shortcut", base::string16(shortcut));
+
+  ASSERT_EQ(E_INVALIDARG, root_obj->get_accKeyboardShortcut(SELF, NULL));
+  ScopedVariant bad_id(999);
+  ScopedBstr k2;
+  ASSERT_EQ(E_INVALIDARG, root_obj->get_accKeyboardShortcut(
+      bad_id, k2.Receive()));
+}
+
+TEST_F(AXPlatformNodeWinTest, TestIAccessibleRole) {
+  AXNodeData root;
+  root.id = 1;
+  root.role = AX_ROLE_ROOT_WEB_AREA;
+  root.child_ids.push_back(2);
+
+  AXNodeData child;
+  child.id = 2;
+
+  Init(root, child);
+  AXNode* child_node = GetRootNode()->children()[0];
+  ScopedComPtr<IAccessible> child_iaccessible(
+      IAccessibleFromNode(child_node));
+
+  ScopedVariant role;
+
+  child.role = AX_ROLE_ALERT;
+  child_node->SetData(child);
+  ASSERT_EQ(S_OK, child_iaccessible->get_accRole(SELF, role.Receive()));
+  EXPECT_EQ(ROLE_SYSTEM_ALERT, V_I4(&role));
+
+  child.role = AX_ROLE_BUTTON;
+  child_node->SetData(child);
+  ASSERT_EQ(S_OK, child_iaccessible->get_accRole(SELF, role.Receive()));
+  EXPECT_EQ(ROLE_SYSTEM_PUSHBUTTON, V_I4(&role));
+
+  child.role = AX_ROLE_POP_UP_BUTTON;
+  child_node->SetData(child);
+  ASSERT_EQ(S_OK, child_iaccessible->get_accRole(SELF, role.Receive()));
+  EXPECT_EQ(ROLE_SYSTEM_BUTTONMENU, V_I4(&role));
+
+  ASSERT_EQ(E_INVALIDARG, child_iaccessible->get_accRole(SELF, NULL));
+  ScopedVariant bad_id(999);
+  ASSERT_EQ(E_INVALIDARG, child_iaccessible->get_accRole(
+      bad_id, role.Receive()));
+}
+
+TEST_F(AXPlatformNodeWinTest, TestIAccessibleLocation) {
+  AXNodeData root;
+  root.id = 1;
+  root.role = AX_ROLE_ROOT_WEB_AREA;
+  root.location = gfx::Rect(10, 40, 800, 600);
+  Init(root);
+
+  TestAXNodeWrapper::SetGlobalCoordinateOffset(gfx::Vector2d(100, 200));
+
+  LONG x_left, y_top, width, height;
+  ASSERT_EQ(S_OK, GetRootIAccessible()->accLocation(
+      &x_left, &y_top, &width, &height, SELF));
+  EXPECT_EQ(110, x_left);
+  EXPECT_EQ(240, y_top);
+  EXPECT_EQ(800, width);
+  EXPECT_EQ(600, height);
+
+  ASSERT_EQ(E_INVALIDARG, GetRootIAccessible()->accLocation(
+      NULL, &y_top, &width, &height, SELF));
+  ASSERT_EQ(E_INVALIDARG, GetRootIAccessible()->accLocation(
+      &x_left, NULL, &width, &height, SELF));
+  ASSERT_EQ(E_INVALIDARG, GetRootIAccessible()->accLocation(
+      &x_left, &y_top, NULL, &height, SELF));
+  ASSERT_EQ(E_INVALIDARG, GetRootIAccessible()->accLocation(
+      &x_left, &y_top, &width, NULL, SELF));
+  ScopedVariant bad_id(999);
+  ASSERT_EQ(E_INVALIDARG, GetRootIAccessible()->accLocation(
+      &x_left, &y_top, &width, &height, bad_id));
+}
+
+TEST_F(AXPlatformNodeWinTest, TestIAccessibleChildAndParent) {
+  AXNodeData root;
+  root.id = 1;
+  root.role = AX_ROLE_ROOT_WEB_AREA;
+  root.child_ids.push_back(2);
+  root.child_ids.push_back(3);
+
+  AXNodeData button;
+  button.role = AX_ROLE_BUTTON;
+  button.id = 2;
+
+  AXNodeData checkbox;
+  checkbox.role = AX_ROLE_CHECK_BOX;
+  checkbox.id = 3;
+
+  Init(root, button, checkbox);
+  AXNode* button_node = GetRootNode()->children()[0];
+  AXNode* checkbox_node = GetRootNode()->children()[1];
+  ScopedComPtr<IAccessible> root_iaccessible(GetRootIAccessible());
+  ScopedComPtr<IAccessible> button_iaccessible(
+      IAccessibleFromNode(button_node));
+  ScopedComPtr<IAccessible> checkbox_iaccessible(
+      IAccessibleFromNode(checkbox_node));
+
+  LONG child_count;
+  ASSERT_EQ(S_OK, root_iaccessible->get_accChildCount(&child_count));
+  ASSERT_EQ(2L, child_count);
+  ASSERT_EQ(S_OK, button_iaccessible->get_accChildCount(&child_count));
+  ASSERT_EQ(0L, child_count);
+  ASSERT_EQ(S_OK, checkbox_iaccessible->get_accChildCount(&child_count));
+  ASSERT_EQ(0L, child_count);
+
+  {
+    ScopedComPtr<IDispatch> result;
+    ASSERT_EQ(S_OK, root_iaccessible->get_accChild(SELF, result.Receive()));
+    ASSERT_EQ(result.get(), root_iaccessible);
+  }
+
+  {
+    ScopedComPtr<IDispatch> result;
+    ScopedVariant child1(1);
+    ASSERT_EQ(S_OK, root_iaccessible->get_accChild(child1, result.Receive()));
+    ASSERT_EQ(result.get(), button_iaccessible);
+  }
+
+  {
+    ScopedComPtr<IDispatch> result;
+    ScopedVariant child2(2);
+    ASSERT_EQ(S_OK, root_iaccessible->get_accChild(child2, result.Receive()));
+    ASSERT_EQ(result.get(), checkbox_iaccessible);
+  }
+
+  {
+    // Asking for child id 3 should fail.
+    ScopedComPtr<IDispatch> result;
+    ScopedVariant child3(3);
+    ASSERT_EQ(E_FAIL, root_iaccessible->get_accChild(child3, result.Receive()));
+  }
+
+  // We should be able to ask for the button by its unique id too.
+  LONG button_unique_id;
+  ScopedComPtr<IAccessible2> button_iaccessible2 =
+      ToIAccessible2(button_iaccessible);
+  button_iaccessible2->get_uniqueID(&button_unique_id);
+  ASSERT_LT(button_unique_id, 0);
+  {
+    ScopedComPtr<IDispatch> result;
+    ScopedVariant button_id_variant(button_unique_id);
+    ASSERT_EQ(S_OK, root_iaccessible->get_accChild(button_id_variant,
+                                                   result.Receive()));
+    ASSERT_EQ(result.get(), button_iaccessible);
+  }
+
+  // Now check parents.
+  {
+    ScopedComPtr<IDispatch> result;
+    ASSERT_EQ(S_OK, button_iaccessible->get_accParent(result.Receive()));
+    ASSERT_EQ(result.get(), root_iaccessible);
+  }
+
+  {
+    ScopedComPtr<IDispatch> result;
+    ASSERT_EQ(S_OK, checkbox_iaccessible->get_accParent(result.Receive()));
+    ASSERT_EQ(result.get(), root_iaccessible);
+  }
+
+  {
+    ScopedComPtr<IDispatch> result;
+    ASSERT_EQ(S_FALSE, root_iaccessible->get_accParent(result.Receive()));
+  }
+}
+
+}  // namespace ui