new testcase

llvm-svn: 38545

clang/test/Preprocessor/includeexpand.c

@@ -0,0 +1,12 @@
+// RUN: clang %s -fno-caret-diagnostics 2>&1 | grep 'file successfully included' | wc -l | grep 3
+
+// XX expands to nothing.
+#define XX
+
+#define FILE "file_to_include.h"
+#include XX FILE
+
+#include FILE
+
+
+#include "file_to_include.h"