1 files changed, 44 insertions, 0 deletions
diff --git a/test/Lexer/header.cpp b/test/Lexer/header.cpp
new file mode 100644
index 000000000000..f02b1e69db43
--- /dev/null
+++ b/test/Lexer/header.cpp
@@ -0,0 +1,44 @@
+// RUN: %clang_cc1 -fsyntax-only -Wno-header-guard %s
+// RUN: %clang_cc1 -fsyntax-only -Wheader-guard %s 2>&1 | FileCheck %s
+
+#include "Inputs/good-header-guard.h"
+#include "Inputs/no-define.h"
+#include "Inputs/different-define.h"
+#include "Inputs/out-of-order-define.h"
+#include "Inputs/tokens-between-ifndef-and-define.h"
+#include "Inputs/unlikely-to-be-header-guard.h"
+
+#include "Inputs/bad-header-guard.h"
+// CHECK: In file included from {{.*}}header.cpp:{{[0-9]*}}:
+// CHECK: {{.*}}bad-header-guard.h:1:9: warning: 'bad_header_guard' is used as a header guard here, followed by #define of a different macro
+// CHECK: {{^}}#ifndef bad_header_guard
+// CHECK: {{^}}        ^~~~~~~~~~~~~~~~
+// CHECK: {{.*}}bad-header-guard.h:2:9: note: 'bad_guard' is defined here; did you mean 'bad_header_guard'?
+// CHECK: {{^}}#define bad_guard
+// CHECK: {{^}}        ^~~~~~~~~
+// CHECK: {{^}}        bad_header_guard
+
+#include "Inputs/bad-header-guard-defined.h"
+// CHECK: In file included from {{.*}}header.cpp:{{[0-9]*}}:
+// CHECK: {{.*}}bad-header-guard-defined.h:1:2: warning: 'foo' is used as a header guard here, followed by #define of a different macro
+// CHECK: {{^}}#if !defined(foo)
+// CHECK: {{^}} ^~
+// CHECK: {{.*}}bad-header-guard-defined.h:2:9: note: 'goo' is defined here; did you mean 'foo'?
+// CHECK: {{^}}#define goo
+// CHECK: {{^}}        ^~~
+// CHECK: {{^}}        foo
+
+#include "Inputs/multiple.h"
+#include "Inputs/multiple.h"
+#include "Inputs/multiple.h"
+#include "Inputs/multiple.h"
+// CHECK: In file included from {{.*}}header.cpp:{{[0-9]*}}:
+// CHECK: {{.*}}multiple.h:1:9: warning: 'multiple' is used as a header guard here, followed by #define of a different macro
+// CHECK: {{^}}#ifndef multiple
+// CHECK: {{^}}        ^~~~~~~~
+// CHECK: {{.*}}multiple.h:2:9: note: 'multi' is defined here; did you mean 'multiple'?
+// CHECK: {{^}}#define multi
+// CHECK: {{^}}        ^~~~~
+// CHECK: {{^}}        multiple
+
+// CHECK: 3 warnings generated.