--- /dev/null
+/* Copyright 2020-2021 IGEL Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef TEST_HELPERS_H
+#define TEST_HELPERS_H
+
+#include <stdint.h>
+
+#define UNUSED(x) (void)(x)
+#define ARRAY_LEN(x) ((int)(sizeof(x) / sizeof(x[0])))
+
+/* Get a vaild fd to use a a placeholder.
+ * The dummy fd should never be used for anything other
+ * than comparing the fd value or the referenced file description. */
+int get_dummy_fd(void);
+
+void check_fd_equality(int fd1, int fd2);
+void check_fd_is_open(int fd);
+void check_fd_is_closed(int fd);
+
+void check_uint_array_eq(const uint32_t *a, const uint32_t *b, int cnt);
+#endif