1 files changed, 83 insertions, 0 deletions
diff --git a/test/Preprocessor/has_include.c b/test/Preprocessor/has_include.c
new file mode 100644
index 000000000000..40697c099f4f
--- /dev/null
+++ b/test/Preprocessor/has_include.c
@@ -0,0 +1,83 @@
+// RUN: clang-cc -Eonly -verify %s
+
+// Try different path permutations of __has_include with existing file.
+#if __has_include("stdio.h")
+#else
+  #error "__has_include failed (1)."
+#endif
+
+#if __has_include(<stdio.h>)
+#else
+  #error "__has_include failed (2)."
+#endif
+
+// Try unary expression.
+#if !__has_include("stdio.h")
+  #error "__has_include failed (5)."
+#endif
+
+// Try binary expression.
+#if __has_include("stdio.h") && __has_include("stddef.h")
+#else
+  #error "__has_include failed (6)."
+#endif
+
+// Try non-existing file.
+#if __has_include("blahblah.h")
+  #error "__has_include failed (7)."
+#endif
+
+// Try defined.
+#if !defined(__has_include)
+  #error "defined(__has_include) failed (8)."
+#endif
+
+// Try different path permutations of __has_include_next with existing file.
+#if __has_include_next("stddef.h") // expected-warning {{#include_next in primary source file}}
+#else
+  #error "__has_include failed (1)."
+#endif
+
+#if __has_include_next(<stddef.h>) // expected-warning {{#include_next in primary source file}}
+#else
+  #error "__has_include failed (2)."
+#endif
+
+// Try unary expression.
+#if !__has_include_next("stdio.h") // expected-warning {{#include_next in primary source file}}
+  #error "__has_include_next failed (5)."
+#endif
+
+// Try binary expression.
+#if __has_include_next("stdio.h") && __has_include("stddef.h") // expected-warning {{#include_next in primary source file}}
+#else
+  #error "__has_include_next failed (6)."
+#endif
+
+// Try non-existing file.
+#if __has_include_next("blahblah.h") // expected-warning {{#include_next in primary source file}}
+  #error "__has_include_next failed (7)."
+#endif
+
+// Try defined.
+#if !defined(__has_include_next)
+  #error "defined(__has_include_next) failed (8)."
+#endif
+
+// Try badly formed expressions.
+// FIXME: I don't quite know how to avoid preprocessor side effects.
+// Use FileCheck?
+// It also assert due to unterminated #if's.
+//#if __has_include("stdio.h"
+//#if __has_include "stdio.h")
+//#if __has_include(stdio.h)
+//#if __has_include()
+//#if __has_include(
+//#if __has_include)
+//#if __has_include
+//#if __has_include(<stdio.h>
+//#if __has_include<stdio.h>)
+//#if __has_include("stdio.h)
+//#if __has_include(stdio.h")
+//#if __has_include(<stdio.h)
+//#if __has_include(stdio.h>)