2 files changed, 12 insertions, 0 deletions
diff --git a/testing/test_support.cpp b/testing/test_support.cpp
index 1ad8543bae..e5c3ab45a0 100644
--- a/testing/test_support.cpp
+++ b/testing/test_support.cpp
@@ -9,6 +9,7 @@
 
 #include "core/fdrm/crypto/fx_crypt.h"
 #include "core/fxcrt/fx_memory.h"
+#include "core/fxcrt/fx_string.h"
 #include "testing/utils/path_service.h"
 
 #ifdef PDF_ENABLE_V8
@@ -103,6 +104,13 @@ std::unique_ptr<char, pdfium::FreeDeleter> GetFileContents(const char* filename,
   return buffer;
 }
 
+std::string GetPlatformString(FPDF_WIDESTRING wstr) {
+  return std::string(
+      CFX_WideString::FromUTF16LE(wstr, CFX_WideString::WStringLength(wstr))
+          .UTF8Encode()
+          .c_str());
+}
+
 std::wstring GetPlatformWString(FPDF_WIDESTRING wstr) {
   if (!wstr)
     return nullptr;
diff --git a/testing/test_support.h b/testing/test_support.h
index 7676e5783b..feec4bbe0b 100644
--- a/testing/test_support.h
+++ b/testing/test_support.h
@@ -62,6 +62,10 @@ std::unique_ptr<char, pdfium::FreeDeleter> GetFileContents(const char* filename,
 
 std::vector<std::string> StringSplit(const std::string& str, char delimiter);
 
+// Converts a FPDF_WIDESTRING to a std::string.
+// Deals with differences between UTF16LE and UTF8.
+std::string GetPlatformString(FPDF_WIDESTRING wstr);
+
 // Converts a FPDF_WIDESTRING to a std::wstring.
 // Deals with differences between UTF16LE and wchar_t.
 std::wstring GetPlatformWString(FPDF_WIDESTRING wstr);