ChibiOS 2.6.8, until I can figure out where to get it from git.

firmware/chibios/test/testmsg.c

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+/*
+    ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
+
+    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.
+*/
+
+#include "ch.h"
+#include "test.h"
+
+/**
+ * @page test_msg Messages test
+ *
+ * File: @ref testmsg.c
+ *
+ * <h2>Description</h2>
+ * This module implements the test sequence for the @ref messages subsystem.
+ *
+ * <h2>Objective</h2>
+ * Objective of the test module is to cover 100% of the @ref messages
+ * subsystem code.
+ *
+ * <h2>Preconditions</h2>
+ * The module requires the following kernel options:
+ * - @p CH_USE_MESSAGES
+ * .
+ * In case some of the required options are not enabled then some or all tests
+ * may be skipped.
+ *
+ * <h2>Test Cases</h2>
+ * - @subpage test_msg_001
+ * .
+ * @file testmsg.c
+ * @brief Messages test source file
+ * @file testmsg.h
+ * @brief Messages header file
+ */
+
+#if CH_USE_MESSAGES || defined(__DOXYGEN__)
+
+/**
+ * @page test_msg_001 Messages Server loop
+ *
+ * <h2>Description</h2>
+ * A thread is spawned that sends four messages back to the tester thread.<br>
+ * The test expect to receive the messages in the correct sequence and to
+ * not find a fifth message waiting.
+ */
+
+static msg_t thread(void *p) {
+
+  chMsgSend(p, 'A');
+  chMsgSend(p, 'B');
+  chMsgSend(p, 'C');
+  return 0;
+}
+
+static void msg1_execute(void) {
+  Thread *tp;
+  msg_t msg;
+
+  /*
+   * Testing the whole messages loop.
+   */
+  threads[0] = chThdCreateStatic(wa[0], WA_SIZE, chThdGetPriority() + 1,
+                                 thread, chThdSelf());
+  tp = chMsgWait();
+  msg = chMsgGet(tp);
+  chMsgRelease(tp, msg);
+  test_emit_token(msg);
+  tp = chMsgWait();
+  msg = chMsgGet(tp);
+  chMsgRelease(tp, msg);
+  test_emit_token(msg);
+  tp = chMsgWait();
+  msg = chMsgGet(tp);
+  chMsgRelease(tp, msg);
+  test_emit_token(msg);
+  test_assert_sequence(1, "ABC");
+}
+
+ROMCONST struct testcase testmsg1 = {
+  "Messages, loop",
+  NULL,
+  NULL,
+  msg1_execute
+};
+
+#endif /* CH_USE_MESSAGES */
+
+/**
+ * @brief   Test sequence for messages.
+ */
+ROMCONST struct testcase * ROMCONST patternmsg[] = {
+#if CH_USE_MESSAGES || defined(__DOXYGEN__)
+  &testmsg1,
+#endif
+  NULL
+};