public void RegisteringStateObserverDoesNotChangeState()
{
var observer = new ObserverThatObservesFooBar();
m_CommandDispatcher.RegisterObserver(observer);
Assert.That(GetState().FooBarStateComponent.Foo, Is.EqualTo(k_StateDefaultValue));
}
public void StateObserverIsNotifiedWhenObservedStateIsModifiedByOtherObserver()
{
var observer1 = new ObserverThatObservesFooBar();
var observer2 = new ObserverThatObservesFewBawAndModifiesFooBar();
m_CommandDispatcher.RegisterObserver(observer1);
m_CommandDispatcher.RegisterObserver(observer2);
m_CommandDispatcher.RegisterCommandHandler <TestGraphToolState, ChangeFewCommand>(ChangeFewCommand.DefaultHandler);
var testState = m_CommandDispatcher.State as TestGraphToolState;
Assert.IsNotNull(testState);
var internalObserver = (IInternalStateObserver)observer1;
var initialObserverVersion = internalObserver.GetLastObservedComponentVersion(nameof(TestGraphToolState.FooBarStateComponent));
m_CommandDispatcher.Dispatch(new ChangeFewCommand(10));
var beforeNotification = testState.FooBarStateComponent.CurrentVersion;
m_CommandDispatcher.NotifyObservers();
var afterNotification = testState.FooBarStateComponent.CurrentVersion;
// Observer version has changed since initial observation.
Assert.AreNotEqual(initialObserverVersion, internalObserver.GetLastObservedComponentVersion(nameof(TestGraphToolState.FooBarStateComponent)));
// Observer version has changed after notifying observers.
Assert.AreNotEqual(beforeNotification, internalObserver.GetLastObservedComponentVersion(nameof(TestGraphToolState.FooBarStateComponent)));
// and is equal to current state version.
Assert.AreEqual(afterNotification, internalObserver.GetLastObservedComponentVersion(nameof(TestGraphToolState.FooBarStateComponent)).Version);
}
public void StateObserverIsNotifiedWhenObservedStateIsModified()
{
var observer = new ObserverThatObservesFooBar();
m_CommandDispatcher.RegisterObserver(observer);
m_CommandDispatcher.RegisterCommandHandler <TestGraphToolState, ChangeFooCommand>(ChangeFooCommand.DefaultHandler);
var testState = m_CommandDispatcher.State as TestGraphToolState;
Assert.IsNotNull(testState);
Assert.IsTrue(observer.ObservedStateComponents.Contains(nameof(TestGraphToolState.FooBarStateComponent)));
var internalObserver = (IInternalStateObserver)observer;
var initialObserverVersion = internalObserver.GetLastObservedComponentVersion(nameof(TestGraphToolState.FooBarStateComponent));
m_CommandDispatcher.Dispatch(new ChangeFooCommand(10));
var currentStateVersion = testState.FooBarStateComponent.CurrentVersion;
m_CommandDispatcher.NotifyObservers();
// Observer version has changed
Assert.AreNotEqual(initialObserverVersion, internalObserver.GetLastObservedComponentVersion(nameof(TestGraphToolState.FooBarStateComponent)));
// and is equal to current state version.
Assert.AreEqual(currentStateVersion, internalObserver.GetLastObservedComponentVersion(nameof(TestGraphToolState.FooBarStateComponent)).Version);
}
public void RegisteringStateObserverTwiceThrows()
{
var observer = new ObserverThatObservesFooBar();
m_CommandDispatcher.RegisterObserver(observer);
Assert.Throws <InvalidOperationException>(() => m_CommandDispatcher.RegisterObserver(observer));
}
public void UnregisteringStateObserverTwiceDoesNotThrow()
{
var observer = new ObserverThatObservesFooBar();
m_CommandDispatcher.RegisterObserver(observer);
m_CommandDispatcher.UnregisterObserver(observer);
m_CommandDispatcher.UnregisterObserver(observer);
LogAssert.NoUnexpectedReceived();
}
public void StateObserverIsNotNotifiedAfterUnregistering()
{
var observer = new ObserverThatObservesFooBar();
m_CommandDispatcher.RegisterObserver(observer);
m_CommandDispatcher.RegisterCommandHandler <TestGraphToolState, ChangeFooCommand>(ChangeFooCommand.DefaultHandler);
var testState = m_CommandDispatcher.State as TestGraphToolState;
Assert.IsNotNull(testState);
Assert.IsTrue(observer.ObservedStateComponents.Contains(nameof(TestGraphToolState.FooBarStateComponent)));
var internalObserver = (IInternalStateObserver)observer;
var initialObserverVersion = internalObserver.GetLastObservedComponentVersion(nameof(TestGraphToolState.FooBarStateComponent));
m_CommandDispatcher.Dispatch(new ChangeFooCommand(10));
m_CommandDispatcher.UnregisterObserver(observer);
m_CommandDispatcher.NotifyObservers();
// Observer version did not change
Assert.AreEqual(initialObserverVersion, internalObserver.GetLastObservedComponentVersion(nameof(TestGraphToolState.FooBarStateComponent)));
}