1 files changed, 13 insertions, 0 deletions
diff --git a/clang/unittests/Format/CleanupTest.cpp b/clang/unittests/Format/CleanupTest.cpp
index dbf3f070476..6ac5f695d43 100644
--- a/clang/unittests/Format/CleanupTest.cpp
+++ b/clang/unittests/Format/CleanupTest.cpp
@@ -714,6 +714,19 @@ TEST_F(CleanUpReplacementsTest, IfNDefWithNoDefine) {
   EXPECT_EQ(Expected, apply(Code, Replaces));
 }
 
+TEST_F(CleanUpReplacementsTest, FakeHeaderGuard) {
+  std::string Code = "// comment \n"
+                     "#ifndef X\n"
+                     "#define 1\n";
+  std::string Expected = "// comment \n"
+                         "#include <vector>\n"
+                         "#ifndef X\n"
+                         "#define 1\n";
+  tooling::Replacements Replaces =
+      toReplacements({createInsertion("#include <vector>")});
+  EXPECT_EQ(Expected, apply(Code, Replaces));
+}
+
 TEST_F(CleanUpReplacementsTest, HeaderGuardWithComment) {
   std::string Code = "// comment \n"
                      "#ifndef X // comment\n"