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, 2 insertions, 2 deletions

diff --git a/core/fxcrt/xml/cfx_xmlparser.cpp b/core/fxcrt/xml/cfx_xmlparser.cpp
index eb79637095..cbfb949705 100644
--- a/core/fxcrt/xml/cfx_xmlparser.cpp
+++ b/core/fxcrt/xml/cfx_xmlparser.cpp
@@ -175,8 +175,8 @@ bool CFX_XMLParser::Parse() {
           auto* instruction = static_cast<CFX_XMLInstruction*>(m_pChild);
           if (!target_data.IsEmpty())
             instruction->AppendData(target_data);
-
-          instruction->AppendData(GetTextData());
+          if (!GetTextData().IsEmpty())
+            instruction->AppendData(GetTextData());
         }
         break;
       }