4 files changed, 31 insertions, 0 deletions
diff --git a/tests/preprocessor/inappropriate-once.slang b/tests/preprocessor/inappropriate-once.slang
new file mode 100644
index 000000000..6b750ec77
--- /dev/null
+++ b/tests/preprocessor/inappropriate-once.slang
@@ -0,0 +1,6 @@
+//TEST:SIMPLE:
+// #include support
+
+#pragma once
+
+int foo() { return 0; }
+\ No newline at end of file
diff --git a/tests/preprocessor/inappropriate-once.slang.expected b/tests/preprocessor/inappropriate-once.slang.expected
new file mode 100644
index 000000000..04d7f7834
--- /dev/null
+++ b/tests/preprocessor/inappropriate-once.slang.expected
@@ -0,0 +1,6 @@
+result code = 0
+standard error = {
+tests/preprocessor/inappropriate-once.slang(4): warning 15602: pragma once was ignored - this is typically because is not placed in an include
+}
+standard output = {
+}
diff --git a/tests/preprocessor/include-multiple.slang b/tests/preprocessor/include-multiple.slang
new file mode 100644
index 000000000..6dd1624bc
--- /dev/null
+++ b/tests/preprocessor/include-multiple.slang
@@ -0,0 +1,10 @@
+//TEST:SIMPLE:
+// #include support
+
+int foo() { return 0; }
+
+#include "include-a.slang.h"
+#include "../preprocessor/include-a.slang.h"
+#include "./include-a.slang.h"
+
+int baz() { return bar(); }
+\ No newline at end of file
diff --git a/tests/preprocessor/include-multiple.slang.expected b/tests/preprocessor/include-multiple.slang.expected
new file mode 100644
index 000000000..d52a5a2ab
--- /dev/null
+++ b/tests/preprocessor/include-multiple.slang.expected
@@ -0,0 +1,9 @@
+result code = -1
+standard error = {
+tests/preprocessor/include-a.slang.h(3): error 30201: function 'bar' already has a body
+tests/preprocessor/include-a.slang.h(3): note: see previous definition of 'bar'
+tests/preprocessor/include-a.slang.h(3): error 30201: function 'bar' already has a body
+tests/preprocessor/include-a.slang.h(3): note: see previous definition of 'bar'
+}
+standard output = {
+}