1 files changed, 8 insertions, 0 deletions
diff --git a/llvm/unittests/ADT/TwineTest.cpp b/llvm/unittests/ADT/TwineTest.cpp
index 950eda2b058..ebe06917cee 100644
--- a/llvm/unittests/ADT/TwineTest.cpp
+++ b/llvm/unittests/ADT/TwineTest.cpp
@@ -88,6 +88,14 @@ TEST(TwineTest, Concat) {
             repr(Twine("a").concat(Twine(SmallString<3>("b")).concat(Twine("c")))));
 }
 
+TEST(TwineTest, Operators) {
+  EXPECT_EQ(R"((Twine cstring:"a" stringref:"b"))", repr("a" + StringRef("b")));
+
+  EXPECT_EQ(R"((Twine stringref:"a" cstring:"b"))", repr(StringRef("a") + "b"));
+  EXPECT_EQ(R"((Twine stringref:"a" stringref:"b"))",
+            repr(StringRef("a") + StringRef("b")));
+}
+
 TEST(TwineTest, toNullTerminatedStringRef) {
   SmallString<8> storage;
   EXPECT_EQ(0, *Twine("hello").toNullTerminatedStringRef(storage).end());