2 files changed, 19 insertions, 0 deletions
diff --git a/lldb/unittests/Utility/CMakeLists.txt b/lldb/unittests/Utility/CMakeLists.txt
index 0594434fb69..1e8dfb51765 100644
--- a/lldb/unittests/Utility/CMakeLists.txt
+++ b/lldb/unittests/Utility/CMakeLists.txt
@@ -1,4 +1,5 @@
 add_lldb_unittest(UtilityTests
+  ConstStringTest.cpp
   ModuleCacheTest.cpp
   StringExtractorTest.cpp
   TaskPoolTest.cpp
diff --git a/lldb/unittests/Utility/ConstStringTest.cpp b/lldb/unittests/Utility/ConstStringTest.cpp
new file mode 100644
index 00000000000..454f656760c
--- /dev/null
+++ b/lldb/unittests/Utility/ConstStringTest.cpp
@@ -0,0 +1,18 @@
+//===-- ConstStringTest.cpp -------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Utility/ConstString.h"
+#include "llvm/Support/FormatVariadic.h"
+#include "gtest/gtest.h"
+
+using namespace lldb_private;
+
+TEST(ConstStringTest, format_provider) {
+  EXPECT_EQ("foo", llvm::formatv("{0}", ConstString("foo")).str());
+}