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diff --git a/quantum/serial_link/tests/transport_tests.c b/quantum/serial_link/tests/transport_tests.c
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+/*
+The MIT License (MIT)
+
+Copyright (c) 2016 Fred Sundvik
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+#include <cgreen/cgreen.h>
+#include <cgreen/mocks.h>
+#include "serial_link/protocol/transport.c"
+#include "serial_link/protocol/triple_buffered_object.c"
+
+void signal_data_written(void) {
+ mock();
+}
+
+static uint8_t sent_data[2048];
+static uint16_t sent_data_size;
+
+void router_send_frame(uint8_t destination, uint8_t* data, uint16_t size) {
+ mock(destination);
+ memcpy(sent_data + sent_data_size, data, size);
+ sent_data_size += size;
+}
+
+typedef struct {
+ uint32_t test;
+} test_object1_t;
+
+typedef struct {
+ uint32_t test1;
+ uint32_t test2;
+} test_object2_t;
+
+MASTER_TO_ALL_SLAVES_OBJECT(master_to_slave, test_object1_t);
+MASTER_TO_SINGLE_SLAVE_OBJECT(master_to_single_slave, test_object1_t);
+SLAVE_TO_MASTER_OBJECT(slave_to_master, test_object1_t);
+
+static remote_object_t* test_remote_objects[] = {
+ REMOTE_OBJECT(master_to_slave),
+ REMOTE_OBJECT(master_to_single_slave),
+ REMOTE_OBJECT(slave_to_master),
+};
+
+Describe(Transport);
+BeforeEach(Transport) {
+ add_remote_objects(test_remote_objects, sizeof(test_remote_objects) / sizeof(remote_object_t*));
+ sent_data_size = 0;
+}
+AfterEach(Transport) {}
+
+Ensure(Transport, write_to_local_signals_an_event) {
+ begin_write_master_to_slave();
+ expect(signal_data_written);
+ end_write_master_to_slave();
+ begin_write_slave_to_master();
+ expect(signal_data_written);
+ end_write_slave_to_master();
+ begin_write_master_to_single_slave(1);
+ expect(signal_data_written);
+ end_write_master_to_single_slave(1);
+}
+
+Ensure(Transport, writes_from_master_to_all_slaves) {
+ update_transport();
+ test_object1_t* obj = begin_write_master_to_slave();
+ obj->test = 5;
+ expect(signal_data_written);
+ end_write_master_to_slave();
+ expect(router_send_frame,
+ when(destination, is_equal_to(0xFF)));
+ update_transport();
+ transport_recv_frame(0, sent_data, sent_data_size);
+ test_object1_t* obj2 = read_master_to_slave();
+ assert_that(obj2, is_not_equal_to(NULL));
+ assert_that(obj2->test, is_equal_to(5));
+}
+
+Ensure(Transport, writes_from_slave_to_master) {
+ update_transport();
+ test_object1_t* obj = begin_write_slave_to_master();
+ obj->test = 7;
+ expect(signal_data_written);
+ end_write_slave_to_master();
+ expect(router_send_frame,
+ when(destination, is_equal_to(0)));
+ update_transport();
+ transport_recv_frame(3, sent_data, sent_data_size);
+ test_object1_t* obj2 = read_slave_to_master(2);
+ assert_that(read_slave_to_master(0), is_equal_to(NULL));
+ assert_that(obj2, is_not_equal_to(NULL));
+ assert_that(obj2->test, is_equal_to(7));
+}
+
+Ensure(Transport, writes_from_master_to_single_slave) {
+ update_transport();
+ test_object1_t* obj = begin_write_master_to_single_slave(3);
+ obj->test = 7;
+ expect(signal_data_written);
+ end_write_master_to_single_slave(3);
+ expect(router_send_frame,
+ when(destination, is_equal_to(4)));
+ update_transport();
+ transport_recv_frame(0, sent_data, sent_data_size);
+ test_object1_t* obj2 = read_master_to_single_slave();
+ assert_that(obj2, is_not_equal_to(NULL));
+ assert_that(obj2->test, is_equal_to(7));
+}
+
+Ensure(Transport, ignores_object_with_invalid_id) {
+ update_transport();
+ test_object1_t* obj = begin_write_master_to_single_slave(3);
+ obj->test = 7;
+ expect(signal_data_written);
+ end_write_master_to_single_slave(3);
+ expect(router_send_frame,
+ when(destination, is_equal_to(4)));
+ update_transport();
+ sent_data[sent_data_size - 1] = 44;
+ transport_recv_frame(0, sent_data, sent_data_size);
+ test_object1_t* obj2 = read_master_to_single_slave();
+ assert_that(obj2, is_equal_to(NULL));
+}
+
+Ensure(Transport, ignores_object_with_size_too_small) {
+ update_transport();
+ test_object1_t* obj = begin_write_master_to_slave();
+ obj->test = 7;
+ expect(signal_data_written);
+ end_write_master_to_slave();
+ expect(router_send_frame);
+ update_transport();
+ sent_data[sent_data_size - 2] = 0;
+ transport_recv_frame(0, sent_data, sent_data_size - 1);
+ test_object1_t* obj2 = read_master_to_slave();
+ assert_that(obj2, is_equal_to(NULL));
+}
+
+Ensure(Transport, ignores_object_with_size_too_big) {
+ update_transport();
+ test_object1_t* obj = begin_write_master_to_slave();
+ obj->test = 7;
+ expect(signal_data_written);
+ end_write_master_to_slave();
+ expect(router_send_frame);
+ update_transport();
+ sent_data[sent_data_size + 21] = 0;
+ transport_recv_frame(0, sent_data, sent_data_size + 22);
+ test_object1_t* obj2 = read_master_to_slave();
+ assert_that(obj2, is_equal_to(NULL));
+}