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// Copyright 2014 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "cobalt/dom/node.h"
#include "base/basictypes.h"
#include "cobalt/dom/comment.h"
#include "cobalt/dom/document.h"
#include "cobalt/dom/element.h"
#include "cobalt/dom/global_stats.h"
#include "cobalt/dom/html_collection.h"
#include "cobalt/dom/html_element_context.h"
#include "cobalt/dom/node_list.h"
#include "cobalt/dom/testing/gtest_workarounds.h"
#include "cobalt/dom/text.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace cobalt {
namespace dom {
namespace {
const scoped_refptr<Node> kNullNode;
const scoped_refptr<HTMLCollection> kNullCollection;
// Helper function that validates that the children of the given node are
// identical to the provided expected array.
template <int N>
void ExpectNodeChildrenEq(scoped_refptr<Node>(&children)[N],
const scoped_refptr<Node>& node) {
// Make sure that we have at least one child.
COMPILE_ASSERT(N >= 1, expect_node_children_has_no_child);
EXPECT_EQ(children[0], node->first_child());
EXPECT_EQ(children[N - 1], node->last_child());
EXPECT_EQ(NULL, children[0]->previous_sibling());
EXPECT_EQ(NULL, children[N - 1]->next_sibling());
for (int i = 0; i < N; ++i) {
EXPECT_EQ(node, children[i]->parent_node());
if (i > 0) {
EXPECT_EQ(children[i - 1], children[i]->previous_sibling());
}
if (i < N - 1) {
EXPECT_EQ(children[i + 1], children[i]->next_sibling());
}
}
}
} // namespace
//////////////////////////////////////////////////////////////////////////
// NodeTest
//////////////////////////////////////////////////////////////////////////
class NodeTest : public ::testing::Test {
protected:
NodeTest();
~NodeTest() override;
HTMLElementContext html_element_context_;
scoped_refptr<Document> document_;
};
NodeTest::NodeTest() {
EXPECT_TRUE(GlobalStats::GetInstance()->CheckNoLeaks());
document_ = new Document(&html_element_context_);
}
NodeTest::~NodeTest() {
document_ = NULL;
EXPECT_TRUE(GlobalStats::GetInstance()->CheckNoLeaks());
}
//////////////////////////////////////////////////////////////////////////
// Test cases
//////////////////////////////////////////////////////////////////////////
TEST_F(NodeTest, CreateNode) {
scoped_refptr<Node> node = new Element(document_);
ASSERT_TRUE(node);
}
TEST_F(NodeTest, CloneNode) {
scoped_refptr<Element> root = new Element(document_, base::Token("root"));
root->SetAttribute("id", "root");
root->AppendChild(new Text(document_, "text"));
scoped_refptr<Element> child =
root->AppendChild(new Element(document_, base::Token("child")))
->AsElement();
child->SetAttribute("id", "child");
// Shallow clone should only clone the node itself.
scoped_refptr<Node> shallow_clone = root->CloneNode(false);
ASSERT_TRUE(shallow_clone->IsElement());
EXPECT_EQ("root", shallow_clone->AsElement()->GetAttribute("id").value());
EXPECT_FALSE(shallow_clone->HasChildNodes());
// Deep clone should clone the node and its descendants.
scoped_refptr<Node> deep_clone = root->CloneNode(true);
ASSERT_TRUE(deep_clone->IsElement());
EXPECT_EQ("root", deep_clone->AsElement()->GetAttribute("id").value());
ASSERT_EQ(2, deep_clone->child_nodes()->length());
EXPECT_TRUE(deep_clone->first_child()->IsText());
EXPECT_EQ("text", deep_clone->first_child()->AsText()->data());
EXPECT_TRUE(deep_clone->last_child()->IsElement());
EXPECT_EQ("child",
deep_clone->last_child()->AsElement()->GetAttribute("id").value());
}
TEST_F(NodeTest, AppendChild) {
scoped_refptr<Node> root = new Element(document_);
scoped_refptr<Node> child1 = root->AppendChild(new Element(document_));
ASSERT_TRUE(child1);
scoped_refptr<Node> child2 = root->AppendChild(new Element(document_));
ASSERT_TRUE(child2);
// Properly handle NULL input.
EXPECT_EQ(NULL, root->AppendChild(NULL));
scoped_refptr<Node> children[] = {child1, child2};
ExpectNodeChildrenEq(children, root);
}
TEST_F(NodeTest, AppendChildTwice) {
scoped_refptr<Node> root = new Element(document_);
scoped_refptr<Node> child1 = root->AppendChild(new Element(document_));
scoped_refptr<Node> child2 = root->AppendChild(new Element(document_));
// Append child1 for the second time.
root->AppendChild(child1);
scoped_refptr<Node> children[] = {child2, child1};
ExpectNodeChildrenEq(children, root);
}
TEST_F(NodeTest, Contains) {
scoped_refptr<Node> root = new Element(document_);
scoped_refptr<Node> node = new Element(document_);
scoped_refptr<Node> child1 = root->AppendChild(new Element(document_));
scoped_refptr<Node> child2 = root->AppendChild(new Element(document_));
EXPECT_TRUE(root->Contains(child1));
EXPECT_TRUE(root->Contains(child2));
EXPECT_FALSE(root->Contains(root));
EXPECT_FALSE(root->Contains(node));
}
TEST_F(NodeTest, AppendChildWithParent) {
scoped_refptr<Node> root1 = new Element(document_);
scoped_refptr<Node> root2 = new Element(document_);
scoped_refptr<Node> child = new Element(document_);
root1->AppendChild(child);
root2->AppendChild(child);
EXPECT_FALSE(root1->Contains(child));
EXPECT_TRUE(root2->Contains(child));
EXPECT_EQ(root2, child->parent_node());
}
TEST_F(NodeTest, InsertBefore) {
scoped_refptr<Node> root = new Element(document_);
scoped_refptr<Node> child1 = root->InsertBefore(new Element(document_), NULL);
ASSERT_TRUE(child1);
scoped_refptr<Node> child3 = root->InsertBefore(new Element(document_), NULL);
ASSERT_TRUE(child3);
scoped_refptr<Node> child2 =
root->InsertBefore(new Element(document_), child3);
ASSERT_TRUE(child2);
// Properly handle NULL input.
EXPECT_EQ(NULL, root->InsertBefore(NULL, NULL));
// Properly handle a reference node that is not a child of root.
EXPECT_EQ(NULL,
root->InsertBefore(new Element(document_), new Element(document_)));
scoped_refptr<Node> children[] = {child1, child2, child3};
ExpectNodeChildrenEq(children, root);
}
TEST_F(NodeTest, InsertBeforeTwice) {
scoped_refptr<Node> root = new Element(document_);
scoped_refptr<Node> child1 = root->InsertBefore(new Element(document_), NULL);
scoped_refptr<Node> child2 = root->InsertBefore(new Element(document_), NULL);
EXPECT_TRUE(root->InsertBefore(child2, child1));
scoped_refptr<Node> children[] = {child2, child1};
ExpectNodeChildrenEq(children, root);
}
TEST_F(NodeTest, InsertBeforeSelf) {
scoped_refptr<Node> root = new Element(document_);
scoped_refptr<Node> child1 = root->InsertBefore(new Element(document_), NULL);
scoped_refptr<Node> child2 = root->InsertBefore(new Element(document_), NULL);
EXPECT_TRUE(root->InsertBefore(child2, child2));
scoped_refptr<Node> children[] = {child1, child2};
ExpectNodeChildrenEq(children, root);
}
TEST_F(NodeTest, InsertIntoAnotherDocument) {
scoped_refptr<Node> root = new Element(document_);
EXPECT_EQ(document_, root->node_document());
scoped_refptr<Document> new_document = new Document(&html_element_context_);
new_document->AppendChild(root);
EXPECT_EQ(new_document, root->node_document());
}
TEST_F(NodeTest, RemoveChild) {
scoped_refptr<Node> root = new Element(document_);
scoped_refptr<Node> child1 = root->AppendChild(new Element(document_));
scoped_refptr<Node> child2 = root->AppendChild(new Element(document_));
scoped_refptr<Node> child3 = root->AppendChild(new Element(document_));
EXPECT_TRUE(root->RemoveChild(child1));
EXPECT_TRUE(root->RemoveChild(child3));
// Properly handle NULL input.
EXPECT_EQ(NULL, root->RemoveChild(NULL));
// Properly handle a node that is not a child of root.
EXPECT_EQ(NULL, root->RemoveChild(child1));
scoped_refptr<Node> children[] = {child2};
ExpectNodeChildrenEq(children, root);
}
TEST_F(NodeTest, ChildNodes) {
scoped_refptr<Node> root = new Element(document_);
EXPECT_FALSE(root->HasChildNodes());
EXPECT_EQ(0, root->child_nodes()->length());
EXPECT_EQ(kNullNode, root->child_nodes()->Item(0));
scoped_refptr<Node> child = new Element(document_);
root->AppendChild(child);
EXPECT_TRUE(root->HasChildNodes());
EXPECT_EQ(1, root->child_nodes()->length());
EXPECT_EQ(child, root->child_nodes()->Item(0));
EXPECT_EQ(kNullNode, root->child_nodes()->Item(1));
root->RemoveChild(child);
EXPECT_FALSE(root->HasChildNodes());
EXPECT_EQ(0, root->child_nodes()->length());
EXPECT_EQ(kNullNode, root->child_nodes()->Item(0));
}
TEST_F(NodeTest, ParentElement) {
scoped_refptr<Node> root = new Element(document_);
EXPECT_EQ(NULL, root->parent_element());
document_->AppendChild(root);
EXPECT_EQ(NULL, root->parent_element());
scoped_refptr<Node> child = new Element(document_);
root->AppendChild(child);
EXPECT_EQ(root, child->parent_element());
root->RemoveChild(child);
EXPECT_EQ(NULL, child->parent_element());
}
TEST_F(NodeTest, ParentNode) {
scoped_refptr<Node> node = new Element(document_);
node->AppendChild(new Text(document_, "first"));
scoped_refptr<Element> child1 =
node->AppendChild(new Element(document_, base::Token("child1")))
->AsElement();
node->AppendChild(new Text(document_, "middle"));
scoped_refptr<Element> child2 =
node->AppendChild(new Element(document_, base::Token("child2")))
->AsElement();
node->AppendChild(new Text(document_, "last"));
child1->SetAttribute("id", "1");
child2->SetAttribute("id", "2");
scoped_refptr<HTMLCollection> children = node->children();
// Check the result of the methods on ParentNode.
EXPECT_EQ(2, node->child_element_count());
EXPECT_EQ(child1, node->first_element_child());
EXPECT_EQ(child2, node->last_element_child());
ASSERT_TRUE(children);
EXPECT_EQ(2, children->length());
EXPECT_EQ(child1, children->Item(0));
EXPECT_EQ(child2, children->Item(1));
EXPECT_EQ(kNullNode, children->Item(2));
EXPECT_EQ(child1, children->NamedItem("1"));
EXPECT_EQ(child2, children->NamedItem("2"));
EXPECT_EQ(kNullNode, children->NamedItem("3"));
// Remove a child and make sure that the children collection was updated
// accordingly.
node->RemoveChild(child2);
EXPECT_EQ(1, children->length());
EXPECT_EQ(child1, children->Item(0));
EXPECT_EQ(kNullNode, children->Item(1));
EXPECT_EQ(child1, children->NamedItem("1"));
EXPECT_EQ(kNullNode, children->NamedItem("2"));
}
TEST_F(NodeTest, NonDocumentTypeChildNode) {
scoped_refptr<Node> node = new Element(document_);
node->AppendChild(new Text(document_, "first"));
scoped_refptr<Element> child1 =
node->AppendChild(new Element(document_, base::Token("child1")))
->AsElement();
node->AppendChild(new Text(document_, "middle"));
scoped_refptr<Element> child2 =
node->AppendChild(new Element(document_, base::Token("child2")))
->AsElement();
scoped_refptr<Element> child3 =
node->AppendChild(new Element(document_, base::Token("child3")))
->AsElement();
node->AppendChild(new Text(document_, "last"));
scoped_refptr<HTMLCollection> children = node->children();
EXPECT_EQ(kNullNode, child1->previous_element_sibling());
EXPECT_EQ(child1, child2->previous_element_sibling());
EXPECT_EQ(child2, child3->previous_element_sibling());
EXPECT_EQ(child2, child1->next_element_sibling());
EXPECT_EQ(child3, child2->next_element_sibling());
EXPECT_EQ(kNullNode, child3->next_element_sibling());
}
TEST_F(NodeTest, OwnerDocumentAndNodeDocument) {
scoped_refptr<Node> element1 = new Element(document_);
scoped_refptr<Node> element2 = new Element(document_);
EXPECT_FALSE(document_->owner_document());
EXPECT_EQ(document_, document_->node_document());
EXPECT_EQ(document_, element1->owner_document());
EXPECT_EQ(document_, element1->node_document());
EXPECT_EQ(document_, element2->owner_document());
EXPECT_EQ(document_, element2->node_document());
}
TEST_F(NodeTest, AdoptIntoDocument) {
scoped_refptr<Element> element = new Element(document_);
document_->AppendChild(element);
EXPECT_EQ(document_, element->node_document());
scoped_refptr<Document> new_document = new Document(&html_element_context_);
element->AdoptIntoDocument(new_document);
EXPECT_EQ(new_document, element->node_document());
EXPECT_EQ(NULL, element->parent_node());
}
} // namespace dom
} // namespace cobalt