Fix CFX_XML and add unit tests

This CL fixes several issues in the CFX_XML class and
adds unit tests.

Change-Id: I05270690de8f3c45dceb866e17ef899ae6d23389
Reviewed-on: https://pdfium-review.googlesource.com/31753
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>

1 files changed, 32 insertions, 0 deletions

diff --git a/testing/string_write_stream.cpp b/testing/string_write_stream.cpp
new file mode 100644
index 0000000000..47474389c5
--- /dev/null
+++ b/testing/string_write_stream.cpp
@@ -0,0 +1,32 @@
+// Copyright 2018 PDFium 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 "testing/string_write_stream.h"
+#include "core/fxcrt/bytestring.h"
+#include "core/fxcrt/widestring.h"
+
+StringWriteStream::StringWriteStream() = default;
+
+StringWriteStream::~StringWriteStream() = default;
+
+FX_FILESIZE StringWriteStream::GetSize() {
+  return stream_.tellp();
+}
+
+bool StringWriteStream::Flush() {
+  return true;
+}
+
+bool StringWriteStream::WriteBlock(const void* pData,
+                                   FX_FILESIZE offset,
+                                   size_t size) {
+  ASSERT(offset == 0);
+  stream_.write(static_cast<const char*>(pData), size);
+  return true;
+}
+
+bool StringWriteStream::WriteString(const ByteStringView& str) {
+  stream_.write(str.unterminated_c_str(), str.GetLength());
+  return true;
+}