clang-tidy module: add test for #pragma once check

Utilities/ClangTidyModule/Tests/CMakeLists.txt

@@ -14,3 +14,4 @@ add_run_clang_tidy_test(cmake-use-cmstrlen)
 add_run_clang_tidy_test(cmake-use-cmsys-fstream)
 add_run_clang_tidy_test(cmake-use-bespoke-enum-class)
 add_run_clang_tidy_test(cmake-ostringstream-use-cmstrcat)
+add_run_clang_tidy_test(cmake-use-pragma-once)

Utilities/ClangTidyModule/Tests/cmake-use-pragma-once-stdout.txt

@@ -0,0 +1,25 @@
+cmake-use-pragma-once/cmake-use-pragma-once-both.h:1:1: warning: use #pragma once [cmake-use-pragma-once]
+#ifndef BOTH_H
+^~~~~~~~~~~~~~
+cmake-use-pragma-once/cmake-use-pragma-once-both.h:1:1: note: FIX-IT applied suggested code changes
+cmake-use-pragma-once/cmake-use-pragma-once-both.h:2:1: note: FIX-IT applied suggested code changes
+#define BOTH_H
+^
+cmake-use-pragma-once/cmake-use-pragma-once-both.h:10:1: note: FIX-IT applied suggested code changes
+#endif
+^
+cmake-use-pragma-once/cmake-use-pragma-once-include-guards.h:1:1: warning: use #pragma once [cmake-use-pragma-once]
+#ifndef INCLUDE_GUARDS_H
+^~~~~~~~~~~~~~~~~~~~~~~~
+#pragma once
+cmake-use-pragma-once/cmake-use-pragma-once-include-guards.h:1:1: note: FIX-IT applied suggested code changes
+cmake-use-pragma-once/cmake-use-pragma-once-include-guards.h:2:1: note: FIX-IT applied suggested code changes
+#define INCLUDE_GUARDS_H
+^
+cmake-use-pragma-once/cmake-use-pragma-once-include-guards.h:9:1: note: FIX-IT applied suggested code changes
+#endif
+^
+cmake-use-pragma-once/cmake-use-pragma-once-neither.h:1:1: warning: use #pragma once [cmake-use-pragma-once]
+int neither()
+^
+cmake-use-pragma-once/cmake-use-pragma-once-neither.h:1:1: note: FIX-IT applied suggested code changes

Utilities/ClangTidyModule/Tests/cmake-use-pragma-once.cxx

@@ -0,0 +1,5 @@
+#include "cmake-use-pragma-once/cmake-use-pragma-once.h"
+
+#include "cmake-use-pragma-once/cmake-use-pragma-once-both.h"
+#include "cmake-use-pragma-once/cmake-use-pragma-once-include-guards.h"
+#include "cmake-use-pragma-once/cmake-use-pragma-once-neither.h"

Utilities/ClangTidyModule/Tests/cmake-use-pragma-once/cmake-use-pragma-once-both-fixit.h

@@ -0,0 +1,8 @@
+
+
+#pragma once
+
+int both()
+{
+  return 0;
+}

Utilities/ClangTidyModule/Tests/cmake-use-pragma-once/cmake-use-pragma-once-both.h

@@ -0,0 +1,10 @@
+#ifndef BOTH_H
+#define BOTH_H
+#pragma once
+
+int both()
+{
+  return 0;
+}
+
+#endif

Utilities/ClangTidyModule/Tests/cmake-use-pragma-once/cmake-use-pragma-once-include-guards-fixit.h

@@ -0,0 +1,6 @@
+#pragma once
+
+int includeGuards()
+{
+  return 0;
+}

Utilities/ClangTidyModule/Tests/cmake-use-pragma-once/cmake-use-pragma-once-include-guards.h

@@ -0,0 +1,9 @@
+#ifndef INCLUDE_GUARDS_H
+#define INCLUDE_GUARDS_H
+
+int includeGuards()
+{
+  return 0;
+}
+
+#endif

Utilities/ClangTidyModule/Tests/cmake-use-pragma-once/cmake-use-pragma-once-neither-fixit.h

@@ -0,0 +1,5 @@
+#pragma once
+int neither()
+{
+  return 0;
+}

Utilities/ClangTidyModule/Tests/cmake-use-pragma-once/cmake-use-pragma-once-neither.h

@@ -0,0 +1,4 @@
+int neither()
+{
+  return 0;
+}

Utilities/ClangTidyModule/Tests/cmake-use-pragma-once/cmake-use-pragma-once.h

@@ -0,0 +1,6 @@
+#pragma once
+
+int once()
+{
+  return 0;
+}