third_party/WebKit/Source/modules/accessibility/AXObjectTest.cpp

// Copyright 2018 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 "modules/accessibility/AXObject.h"
#include "modules/accessibility/testing/AccessibilityTest.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace blink {

TEST_F(AccessibilityTest, IsDescendantOf) {
  SetBodyInnerHTML(R"HTML(<button id='button'>button</button>)HTML");

  const AXObject* root = GetAXRootObject();
  ASSERT_NE(nullptr, root);
  const AXObject* button = GetAXObjectByElementId("button");
  ASSERT_NE(nullptr, button);

  EXPECT_TRUE(button->IsDescendantOf(*root));
  EXPECT_FALSE(root->IsDescendantOf(*root));
  EXPECT_FALSE(button->IsDescendantOf(*button));
  EXPECT_FALSE(root->IsDescendantOf(*button));
}

TEST_F(AccessibilityTest, IsAncestorOf) {
  SetBodyInnerHTML(R"HTML(<button id='button'>button</button>)HTML");

  const AXObject* root = GetAXRootObject();
  ASSERT_NE(nullptr, root);
  const AXObject* button = GetAXObjectByElementId("button");
  ASSERT_NE(nullptr, button);

  EXPECT_TRUE(root->IsAncestorOf(*button));
  EXPECT_FALSE(root->IsAncestorOf(*root));
  EXPECT_FALSE(button->IsAncestorOf(*button));
  EXPECT_FALSE(button->IsAncestorOf(*root));
}

TEST_F(AccessibilityTest, SimpleTreeNavigation) {
  SetBodyInnerHTML(R"HTML(<input id='input' type='text' value='value'>"
                   R"<p id='paragraph'>hello<br id='br'>there</p>"
                   R"<button id='button'>button</button>)HTML");

  const AXObject* root = GetAXRootObject();
  ASSERT_NE(nullptr, root);
  const AXObject* input = GetAXObjectByElementId("input");
  ASSERT_NE(nullptr, input);
  const AXObject* paragraph = GetAXObjectByElementId("paragraph");
  ASSERT_NE(nullptr, paragraph);
  const AXObject* br = GetAXObjectByElementId("br");
  ASSERT_NE(nullptr, br);
  const AXObject* button = GetAXObjectByElementId("button");
  ASSERT_NE(nullptr, button);

  EXPECT_EQ(input, root->FirstChild());
  EXPECT_EQ(button, root->LastChild());
  EXPECT_EQ(button, root->DeepestLastChild());

  ASSERT_NE(nullptr, paragraph->FirstChild());
  EXPECT_EQ(AccessibilityRole::kStaticTextRole,
            paragraph->FirstChild()->RoleValue());
  ASSERT_NE(nullptr, paragraph->LastChild());
  EXPECT_EQ(AccessibilityRole::kStaticTextRole,
            paragraph->LastChild()->RoleValue());
  ASSERT_NE(nullptr, paragraph->DeepestFirstChild());
  EXPECT_EQ(AccessibilityRole::kStaticTextRole,
            paragraph->DeepestFirstChild()->RoleValue());
  ASSERT_NE(nullptr, paragraph->DeepestLastChild());
  EXPECT_EQ(AccessibilityRole::kStaticTextRole,
            paragraph->DeepestLastChild()->RoleValue());

  // There is a static text element in between the input and the paragraph.
  EXPECT_EQ(paragraph->PreviousSibling(), input->NextSibling());
  ASSERT_NE(nullptr, br->NextSibling());
  EXPECT_EQ(AccessibilityRole::kStaticTextRole, br->NextSibling()->RoleValue());
  ASSERT_NE(nullptr, br->PreviousSibling());
  EXPECT_EQ(AccessibilityRole::kStaticTextRole,
            br->PreviousSibling()->RoleValue());
}

TEST_F(AccessibilityTest, ComparisonOperators) {
  SetBodyInnerHTML(R"HTML(<input id='input' type='text' value='value'>"
                   R"<p id='paragraph'>hello<br id='br'>there</p>"
                   R"<button id='button'>button</button>)HTML");

  const AXObject* root = GetAXRootObject();
  ASSERT_NE(nullptr, root);
  const AXObject* input = GetAXObjectByElementId("input");
  ASSERT_NE(nullptr, input);
  const AXObject* paragraph = GetAXObjectByElementId("paragraph");
  ASSERT_NE(nullptr, paragraph);
  const AXObject* br = GetAXObjectByElementId("br");
  ASSERT_NE(nullptr, br);
  const AXObject* button = GetAXObjectByElementId("button");
  ASSERT_NE(nullptr, button);

  EXPECT_TRUE(*root == *root);
  EXPECT_FALSE(*root != *root);
  EXPECT_FALSE(*root < *root);
  EXPECT_TRUE(*root <= *root);
  EXPECT_FALSE(*root > *root);
  EXPECT_TRUE(*root >= *root);

  EXPECT_TRUE(*input > *root);
  EXPECT_TRUE(*input >= *root);
  EXPECT_FALSE(*input < *root);
  EXPECT_FALSE(*input <= *root);

  EXPECT_TRUE(*input != *root);
  EXPECT_TRUE(*input < *paragraph);
  EXPECT_TRUE(*br > *input);
  EXPECT_TRUE(*paragraph < *br);
  EXPECT_TRUE(*br >= *paragraph);

  EXPECT_TRUE(*paragraph < *button);
  EXPECT_TRUE(*button > *br);
  EXPECT_FALSE(*button < *button);
  EXPECT_TRUE(*button <= *button);
  EXPECT_TRUE(*button >= *button);
  EXPECT_FALSE(*button > *button);
}

}  // namespace blink