1 files changed, 8 insertions, 0 deletions
diff --git a/llvm/unittests/ADT/StringExtrasTest.cpp b/llvm/unittests/ADT/StringExtrasTest.cpp
index 234a40d26cf..7bcdaf62fe5 100644
--- a/llvm/unittests/ADT/StringExtrasTest.cpp
+++ b/llvm/unittests/ADT/StringExtrasTest.cpp
@@ -8,6 +8,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/ADT/StringExtras.h"
+#include "llvm/Support/raw_ostream.h"
 #include "gtest/gtest.h"
 
 using namespace llvm;
@@ -84,3 +85,10 @@ TEST(StringExtrasTest, to_float) {
   EXPECT_FALSE(to_float("7.4 foo", F));
   EXPECT_FLOAT_EQ(4.7f, F); // F should be unchanged
 }
+
+TEST(StringExtrasTest, printLowerCase) {
+  std::string str;
+  raw_string_ostream OS(str);
+  printLowerCase("ABCdefg01234.,&!~`'}\"", OS);
+  EXPECT_EQ("abcdefg01234.,&!~`'}\"", OS.str());
+}