public void TestSwitchState_FromNullToNull_ThrowsException()
{
TestSwitchableStateEngine engine = new TestSwitchableStateEngine();
Assert.That(engine.GetCurState(), Is.Null);
engine.TrySwitchState(null);
}
public void TestSwitchState_FromAStateToSameState_CurStateRemainsState()
{
TestSwitchableStateEngine engine = new TestSwitchableStateEngine();
ITestSwitchableState state = Substitute.For <ITestSwitchableState>();
engine.TrySwitchState(state);
Assert.That(engine.GetCurState(), Is.SameAs(state));
}
public void TestSwitchState_FromStateToDiffStateOfDiffType_TransitionSuccessful()
{
TestSwitchableStateEngine engine = new TestSwitchableStateEngine();
ITestSwitchableState stateA = Substitute.For <ITestSwitchableStateA>();
ITestSwitchableState stateB = Substitute.For <ITestSwitchableStateB>();
engine.TrySwitchState(stateA);
engine.TrySwitchState(stateB);
Assert.That(engine.GetCurState(), Is.SameAs(stateB));
stateA.Received(1).OnEnter();
stateA.Received(1).OnExit();
stateB.Received(1).OnEnter();
}
public void Constructor_WhenCalled_CurStateIsNull()
{
TestSwitchableStateEngine engine = new TestSwitchableStateEngine();
Assert.That(engine.GetCurState(), Is.Null);
}