Revert of Remove webrtc/libjingle/{xmllite,xmpp}

webrtc/libjingle/xmllite/xmlprinter_unittest.cc

+/*
+ *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/libjingle/xmllite/xmlprinter.h"
+
+#include <sstream>
+#include <string>
+
+#include "webrtc/libjingle/xmllite/qname.h"
+#include "webrtc/libjingle/xmllite/xmlelement.h"
+#include "webrtc/libjingle/xmllite/xmlnsstack.h"
+#include "webrtc/base/common.h"
+#include "webrtc/base/gunit.h"
+
+using buzz::QName;
+using buzz::XmlElement;
+using buzz::XmlnsStack;
+using buzz::XmlPrinter;
+
+TEST(XmlPrinterTest, TestBasicPrinting) {
+  XmlElement elt(QName("google:test", "first"));
+  std::stringstream ss;
+  XmlPrinter::PrintXml(&ss, &elt);
+  EXPECT_EQ("<test:first xmlns:test=\"google:test\"/>", ss.str());
+}
+
+TEST(XmlPrinterTest, TestNamespacedPrinting) {
+  XmlElement elt(QName("google:test", "first"));
+  elt.AddElement(new XmlElement(QName("nested:test", "second")));
+  std::stringstream ss;
+
+  XmlnsStack ns_stack;
+  ns_stack.AddXmlns("gg", "google:test");
+  ns_stack.AddXmlns("", "nested:test");
+
+  XmlPrinter::PrintXml(&ss, &elt, &ns_stack);
+  EXPECT_EQ("<gg:first><second/></gg:first>", ss.str());
+}