Document status/error codes in helper.function
diff --git a/tests/suites/helpers.function b/tests/suites/helpers.function
index 7f5a6f2..3c2a6db 100644
--- a/tests/suites/helpers.function
+++ b/tests/suites/helpers.function
@@ -49,17 +49,21 @@
} HexParam_t;
/*----------------------------------------------------------------------------*/
-/* Constants */
+/* Status and error constants */
-#define DEPENDENCY_SUPPORTED 0
-#define KEY_VALUE_MAPPING_FOUND 0
-#define DISPATCH_TEST_SUCCESS 0
+#define DEPENDENCY_SUPPORTED 0 /* Dependency supported by build */
+#define KEY_VALUE_MAPPING_FOUND 0 /* Integer expression found */
+#define DISPATCH_TEST_SUCCESS 0 /* Test dispatch successful */
-#define KEY_VALUE_MAPPING_NOT_FOUND -1
-#define DEPENDENCY_NOT_SUPPORTED -2
-#define DISPATCH_TEST_FN_NOT_FOUND -3
-#define DISPATCH_INVALID_TEST_DATA -4
-#define DISPATCH_UNSUPPORTED_SUITE -5
+#define KEY_VALUE_MAPPING_NOT_FOUND -1 /* Integer expression not found */
+#define DEPENDENCY_NOT_SUPPORTED -2 /* Dependency not supported */
+#define DISPATCH_TEST_FN_NOT_FOUND -3 /* Test function not found */
+#define DISPATCH_INVALID_TEST_DATA -4 /* Invalid test parameter type.
+ Only int, string, binary data
+ and integer expressions are
+ allowed */
+#define DISPATCH_UNSUPPORTED_SUITE -5 /* Test suite not supported by the
+ build */
/*----------------------------------------------------------------------------*/