Add test datalink using mock functions

test/bacnet/datalink/mock/src/arcnet-mock.c

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2020 Legrand North America, LLC.
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <ztest.h>
+#include <stdint.h>
+#include "bacnet/datalink/arcnet.h"
+
+bool arcnet_valid(void)
+{
+    return ztest_get_return_value();
+}
+
+void arcnet_cleanup(void)
+{
+}
+
+bool arcnet_init(char *interface_name)
+{
+    ztest_check_expected_value(interface_name);
+    return ztest_get_return_value();
+}
+
+int arcnet_send_pdu(BACNET_ADDRESS *dest, BACNET_NPDU_DATA *npdu_data,
+                    uint8_t *pdu, unsigned pdu_len)
+{
+    ztest_check_expected_value(dest);
+    ztest_check_expected_value(npdu_data);
+    ztest_check_expected_data(pdu, pdu_len);
+    return ztest_get_return_value();
+}
+
+uint16_t arcnet_receive(BACNET_ADDRESS *src, uint8_t *pdu, uint16_t max_pdu,
+                        unsigned timeout)
+{
+    ztest_check_expected_value(src);
+    ztest_check_expected_value(timeout);
+    ztest_copy_return_data(pdu, max_pdu);
+    return ztest_get_return_value();
+}
+
+void arcnet_get_my_address(BACNET_ADDRESS *my_address)
+{
+    ztest_copy_return_data(my_address, sizeof(BACNET_ADDRESS));
+}
+
+void arcnet_get_broadcast_address(BACNET_ADDRESS *dest)
+{
+    ztest_copy_return_data(dest, sizeof(BACNET_ADDRESS));
+}