diff --git a/autotest/util_fn/init b/autotest/util_fn/init
new file mode 100644
index 000000000..ccc919608
--- /dev/null
+++ b/autotest/util_fn/init
@@ -0,0 +1,4 @@
+#ifndef _util_fn_icpp_init_stub
+#define _util_fn_icpp_init_stub
+#include "Core/init"
+#endif
diff --git a/autotest/util_fn/util_fn.cpp b/autotest/util_fn/util_fn.cpp
new file mode 100644
index 000000000..e4adfdd06
--- /dev/null
+++ b/autotest/util_fn/util_fn.cpp
@@ -0,0 +1,24 @@
+#include <Core/Core.h>
+
+using namespace Upp;
+
+CONSOLE_APP_MAIN
+{
+	StdLogSetup(LOG_COUT|LOG_FILE);
+
+	ASSERT(min(4, 76, 8, 23, 5, 7, 3, 1, 7, 34, 8, 4345, 76, 7, 3) == 1);
+	ASSERT(max(4, 76, 8, 23, 5, 7, 3, 1, 7, 34, 8, 4345, 76, 7, 3) == 4345);
+	ASSERT(clamp(0, 1, 10) == 1);
+	ASSERT(clamp(1, 1, 10) == 1);
+	ASSERT(clamp(5, 1, 10) == 5);
+	ASSERT(clamp(10, 1, 10) == 10);
+	ASSERT(clamp(11, 1, 10) == 10);
+	
+	ASSERT(findarg(4, 0, 1, 2, 3, 4, 5, 6, 7) == 4);
+	ASSERT(findarg(8, 0, 1, 2, 3, 4, 5, 6, 7) == -1);
+
+	ASSERT(decode(4, 0, 10, 1, 11, 2, 12, 3, 13, 4, 14, 5, 15, 16) == 14);
+	ASSERT(decode(20, 0, 10, 1, 11, 2, 12, 3, 13, 4, 14, 5, 15, 16) == 16);
+	
+	LOG("=================== OK");
+}
diff --git a/autotest/util_fn/util_fn.upp b/autotest/util_fn/util_fn.upp
new file mode 100644
index 000000000..58d6879af
--- /dev/null
+++ b/autotest/util_fn/util_fn.upp
@@ -0,0 +1,9 @@
+uses
+	Core;
+
+file
+	util_fn.cpp;
+
+mainconfig
+	"" = "";
+