tests: unit: util: Add test for REVERSE_ARGS

Added test for new macro.

Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>

tests/unit/util/test.inc

@@ -442,6 +442,15 @@ static void test_mixing_GET_ARG_and_FOR_EACH(void)
 	zassert_equal(a[4], 5, NULL);
 }
 
+static void test_REVERSE_ARGS(void)
+{
+	int y[] = {REVERSE_ARGS(1, 2, 3)};
+
+	zassert_equal(y[0], 3, NULL);
+	zassert_equal(y[1], 2, NULL);
+	zassert_equal(y[2], 1, NULL);
+}
+
 #if __cplusplus
 extern "C" void test_cxx(void);
 void test_cxx(void)
@@ -470,7 +479,8 @@ void test_cc(void)
 			 ztest_unit_test(test_nested_FOR_EACH),
 			 ztest_unit_test(test_GET_ARG_N),
 			 ztest_unit_test(test_GET_ARGS_LESS_N),
-			 ztest_unit_test(test_mixing_GET_ARG_and_FOR_EACH)
+			 ztest_unit_test(test_mixing_GET_ARG_and_FOR_EACH),
+			 ztest_unit_test(test_REVERSE_ARGS)
 	);
 
 	ztest_run_test_suite(test_lib_sys_util_tests);