/*

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

#include <QTest>

#include "unittest_cxestatemachine.h"

#include "cxestate.h"

#include "cxestatemachineunit.h"

// -----------------------------------

// CxsStateMachine

// -----------------------------------

UnitTestCxeStateMachine::UnitTestCxeStateMachine()

{

}

UnitTestCxeStateMachine::~UnitTestCxeStateMachine()

{

}

// Run before each individual test case

void UnitTestCxeStateMachine::init()

{

    // create instance of the unit to be tested

    mStateMachine = new CxeStateMachineUnit("UnitTestCxeStateMachine");

    // create test data (CxeState class is tested separated, so we assume it works correctly)

    // these state classes are according to specification,

    // error input is created in that particular test case

    mStartState = new CxeState(StartId, "Start", MiddleId); // starting state

    mMiddleState = new CxeState(MiddleId, "Middle", StartId|EndId|MiddleId); // middle state, "normal"

    mEndState = new CxeState(EndId, "End", 0); // cannot transfer to other states

    mIsolatedState = new CxeState(IsolatedId, "Isolated", MiddleId); // cannot be set after any other state

    QVERIFY(mStateMachine->addState(mStartState));

    QVERIFY(mStateMachine->addState(mMiddleState));

    QVERIFY(mStateMachine->addState(mEndState));

    QVERIFY(mStateMachine->addState(mIsolatedState));

}

// Run after each individual test case

void UnitTestCxeStateMachine::cleanup()

{

    // state machine takes ownership of the states when states are added to statemachine

    // those are deleted when statemachine is deleted

    delete mStateMachine;

    mStateMachine = NULL;

    mStartState = NULL;

    mMiddleState = NULL;

    mEndState = NULL;

    mIsolatedState = NULL;

}

void UnitTestCxeStateMachine::testAddState(){

    // test error cases ( OK cases are tested in init )

    CxeState* mErrorState = NULL;

    // add same state twice -> NOK

    QVERIFY(!mStateMachine->addState(mStartState));

    // stateId should not have overlapping bits, because we need to be able to use bitwise

    // AND operator -> NOK

    mErrorState = new CxeState(5, "Overlapping id", StartId|MiddleId);

    QVERIFY(!mStateMachine->addState(mErrorState));

    delete mErrorState;

    // add state with negative id -> NOK

    mErrorState = new CxeState(-1, "Negative id", StartId|MiddleId);

    QVERIFY(!mStateMachine->addState(mErrorState));

    delete mErrorState;

    // add null state -> NOK

    QVERIFY(!mStateMachine->addState(NULL));

}

void UnitTestCxeStateMachine::testSetState()

{

    // CxeStateMachine::setState

    // sets a state, verifies the that change is allowed, informs about the state change

    // NOTE: check that handleStateChange is called, when state changes (correct parameters)

    // NOTE: check that correct stateid is returned after change

    // NOTE: verifyStateChange has separate testing

    // reset the counter for handleStateChanged slot

    mStateMachine->mHandleStateChangedCounter = 0;

    // set state, when initial state is not set -> NOK

    // check that handleStateChange is not called

    // current state is undefined

    QCOMPARE(mStateMachine->mHandleStateChangedCounter, 0);

    // set start state as initial state, change to another state (allowed change) -> OK

    // (there should be a call to state change, check the error code)

    mStateMachine->setInitialState(StartId);

    QCOMPARE(mStateMachine->mHandleStateChangedCounter, 1);

    QVERIFY(mStateMachine->mStateChangeStateId == MiddleId);

    QVERIFY(mStateMachine->stateId() == MiddleId);

    // set another state (allowed change) -> OK

    QCOMPARE(mStateMachine->mHandleStateChangedCounter, 2);

    QVERIFY(mStateMachine->mStateChangeStateId == EndId);

    QVERIFY(mStateMachine->stateId() == EndId);

    // reset the counter for handleStateChanged slot

    mStateMachine->mHandleStateChangedCounter = 0;

    // set same state again -> OK

    // but state change should not be called

    QCOMPARE(mStateMachine->mHandleStateChangedCounter, 0);

    // setstate to a state that does not exists -> NOK

    // state has not changed

    QVERIFY(mStateMachine->stateId() == EndId);

    QVERIFY(!mStateMachine->setState(UnknownId));

    QCOMPARE(mStateMachine->mHandleStateChangedCounter, 0);

    QVERIFY(mStateMachine->stateId() == EndId);

    // state change verification method has own test cases

}

void UnitTestCxeStateMachine::testSetInitialState()

{

    // CxeStateMachine::setInitialState

    // sets a initial state

    // check that handleStateChange is not called

    // check that correct state has been set

    // set state, when initial state is not set -> OK

    QVERIFY(mStateMachine->setInitialState(StartId));

    QVERIFY(mStateMachine->stateId() == StartId);

    QCOMPARE(mStateMachine->mHandleStateChangedCounter, 0);

    // set state, when initial state is already set -> NOK

    QVERIFY(!mStateMachine->setInitialState(MiddleId));

    QVERIFY(mStateMachine->stateId() == StartId);

    QCOMPARE(mStateMachine->mHandleStateChangedCounter, 0);

}

void UnitTestCxeStateMachine::testStateId()

{

    // check state id, when initial state not set -> stateid == 0

    QCOMPARE(mStateMachine->stateId(), 0);

    // setinitialstate -> check state id

    mStateMachine->setInitialState(StartId);

    QVERIFY(mStateMachine->stateId() == StartId);

}

void UnitTestCxeStateMachine::testVerifyStateChange()

{

    // test change possibilities

    // initial START -> MIDDLE -> OK

    // START -> END -> NOK

    // START -> ISOLATED -> NOK

    // START -> 0 -> NOK

    // START -> UnknownId -> NOK

    // START -> START -> NOK (since START is not defined in allowed next state)

    mStateMachine->setInitialState(StartId);

    QVERIFY(mStateMachine->verifyStateChange(MiddleId));

    QVERIFY(!mStateMachine->verifyStateChange(EndId));

    QVERIFY(!mStateMachine->verifyStateChange(IsolatedId));

    QVERIFY(!mStateMachine->verifyStateChange(0));

    QVERIFY(!mStateMachine->verifyStateChange(UnknownId));

    QVERIFY(!mStateMachine->verifyStateChange(StartId));

    // MIDDLE -> ISOLATED -> NOK

    // MIDDLE -> START -> OK

    // MIDDLE -> END -> OK

    // MIDDLE -> 0 -> NOK

    // MIDDLE -> MIDDLE -> OK (defined in allowed next states)

    mStateMachine->setState(MiddleId);

    QVERIFY(!mStateMachine->verifyStateChange(IsolatedId));

    QVERIFY(mStateMachine->verifyStateChange(StartId));

    QVERIFY(mStateMachine->verifyStateChange(EndId));

    QVERIFY(!mStateMachine->verifyStateChange(0));

    // END -> MIDDLE -> NOK

    // END -> START -> NOK

    // END -> 0 -> NOK

    // END -> UnknownId -> NOK

    mStateMachine->setState(EndId);

    QVERIFY(!mStateMachine->verifyStateChange(MiddleId));

    QVERIFY(!mStateMachine->verifyStateChange(StartId));

    QVERIFY(!mStateMachine->verifyStateChange(0));

    QVERIFY(!mStateMachine->verifyStateChange(UnknownId));

}

// main() function non-GUI testing

QTEST_APPLESS_MAIN(UnitTestCxeStateMachine);