Function testStateMachine

test/test_StateMachine/TestStateMachine.cpp:214–263

* Test the abstract state machine. */

 * Test the abstract state machine.
 */
static void testStateMachine()
{
    TestState       stateA;
    TestState       stateB;
    StateMachine    sm;

    /* State machine has no state yet. */
    TEST_ASSERT_NULL(sm.getState());

    /* Add state A, but don't process it. */
    sm.setState(stateA);
    TEST_ASSERT_NULL(sm.getState());
    TEST_ASSERT_EQUAL_UINT32(0u, stateA.getCallCntEntry());
    TEST_ASSERT_EQUAL_UINT32(0u, stateA.getCallCntExit());

    /* Process it once.
     * Expectation:
     * The entry part is called once and the process part.
     */
    sm.process();
    TEST_ASSERT_EQUAL_UINT32(1u, stateA.getCallCntEntry());
    TEST_ASSERT_EQUAL_UINT32(0u, stateA.getCallCntExit());
    TEST_ASSERT_EQUAL_PTR(static_cast<AbstractState*>(&stateA), sm.getState());

    /* Process it a 2nd time.
     * Expectation:
     * Only the process part is called.
     */
    sm.process();
    TEST_ASSERT_EQUAL_UINT32(1u, stateA.getCallCntEntry());
    TEST_ASSERT_EQUAL_UINT32(0u, stateA.getCallCntExit());

    /* Transistion from A to B. */
    stateA.setState(stateB);
    sm.process();
    sm.process();
    TEST_ASSERT_EQUAL_UINT32(1u, stateA.getCallCntEntry());
    TEST_ASSERT_EQUAL_UINT32(1u, stateA.getCallCntExit());
    TEST_ASSERT_EQUAL_UINT32(1u, stateB.getCallCntEntry());
    TEST_ASSERT_EQUAL_UINT32(0u, stateB.getCallCntExit());

    /* Transistion from B to A. */
    stateB.setState(stateA);
    sm.process();
    sm.process();
    TEST_ASSERT_EQUAL_UINT32(2u, stateA.getCallCntEntry());
    TEST_ASSERT_EQUAL_UINT32(1u, stateA.getCallCntExit());
    TEST_ASSERT_EQUAL_UINT32(1u, stateB.getCallCntEntry());
    TEST_ASSERT_EQUAL_UINT32(1u, stateB.getCallCntExit());
}