Re-introduce printers for Node, Position, PositionAnchorType in GTest

Source/core/testing/CoreTestHelpers.cpp

-// 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 "config.h"
-#include "core/testing/CoreTestHelpers.h"
-
-#include "core/dom/Document.h"
-#include "core/dom/Range.h"
-#include "core/dom/Text.h"
-#include "core/html/HTMLElement.h"
-#include "wtf/text/StringBuilder.h"
-#include <ios>
-#include <ostream> // NOLINT
-
-namespace blink {
-
-namespace {
-
-// Copied from "dom/Node.cpp".
-void appendAttributeDesc(const Node& node, StringBuilder& stringBuilder, const QualifiedName& name, const char* attrDesc)
-{
-    if (!node.isElementNode())
-        return;
-
-    String attr = toElement(node).getAttribute(name);
-    if (attr.isEmpty())
-        return;
-
-    stringBuilder.append(attrDesc);
-    stringBuilder.appendLiteral("=\"");
-    stringBuilder.append(attr);
-    stringBuilder.appendLiteral("\"");
-}
-
-template <typename PositionType>
-std::ostream& printPosition(std::ostream& ostream, const PositionType& position)
-{
-    if (position.isNull())
-        return ostream << "null";
-    ostream << position.anchorNode() << "@";
-    if (position.isOffsetInAnchor())
-        return ostream << position.offsetInContainerNode();
-    return ostream << position.anchorType();
-}
-
-} // namespace
-
-std::ostream& operator<<(std::ostream& ostream, PositionAnchorType anchorType)
-{
-    switch (anchorType) {
-    case PositionAnchorType::AfterAnchor:
-        return ostream << "afterAnchor";
-    case PositionAnchorType::AfterChildren:
-        return ostream << "afterChildren";
-    case PositionAnchorType::BeforeAnchor:
-        return ostream << "beforeAnchor";
-    case PositionAnchorType::BeforeChildren:
-        return ostream << "beforeChildren";
-    case PositionAnchorType::OffsetInAnchor:
-        return ostream << "offsetInAnchor";
-    }
-    ASSERT_NOT_REACHED();
-    return ostream << "anchorType=" << static_cast<int>(anchorType);
-}
-
-// |std::ostream| version of |Node::showNode|
-std::ostream& operator<<(std::ostream& ostream, const Node& node)
-{
-    ostream << node.nodeName().utf8().data();
-    if (node.isTextNode())
-        return ostream << " " << node.nodeValue();
-    StringBuilder attrs;
-    appendAttributeDesc(node, attrs, HTMLNames::idAttr, " ID");
-    appendAttributeDesc(node, attrs, HTMLNames::classAttr, " CLASS");
-    appendAttributeDesc(node, attrs, HTMLNames::styleAttr, " STYLE");
-    return ostream << attrs.toString().utf8().data();
-}
-
-std::ostream& operator<<(std::ostream& ostream, const Node* node)
-{
-    if (!node)
-        return ostream << "null";
-    return ostream << *node;
-}
-
-std::ostream& operator<<(std::ostream& ostream, const Position& position)
-{
-    return printPosition(ostream, position);
-}
-
-std::ostream& operator<<(std::ostream& ostream, const PositionInComposedTree& position)
-{
-    return printPosition(ostream, position);
-}
-
-} // namespace blink