public void GivenContextWithObserverAttachedThatThrowsInvalidOperationException_WhenNotifyingLocationCalculationsElementInEnumerationToObserve_ThenNoExceptionThrown()
{
// Given
var mockRepository = new MockRepository();
var observer = mockRepository.StrictMock <IObserver>();
observer.Expect(o => o.UpdateObserver()).Do((Action)(() => throw new InvalidOperationException()));
mockRepository.ReplayAll();
var observable = new TestObservable();
var locationCalculationsEnumerationToObserve = new ObservableList <IObservable>
{
observable
};
var context = new TestLocationCalculationsContext(new object(), locationCalculationsEnumerationToObserve);
context.Attach(observer);
// When
observable.NotifyObservers();
// Then
mockRepository.VerifyAll();
}
public void NotifyObservers_MultipleObserversDetachingOrAttachingOthers_NoUpdatesForAttachedAndDetachedObservers()
{
// Setup
var mocks = new MockRepository();
var testObservable = new TestObservable();
var observer1 = mocks.Stub <IObserver>();
var observer2 = mocks.Stub <IObserver>();
var observer3 = mocks.Stub <IObserver>();
var observer4 = mocks.Stub <IObserver>();
var observer5 = mocks.Stub <IObserver>();
var observer6 = mocks.Stub <IObserver>();
testObservable.Attach(observer1);
testObservable.Attach(observer2);
testObservable.Attach(observer3);
testObservable.Attach(observer4);
testObservable.Attach(observer6);
observer1.Expect(o => o.UpdateObserver());
observer2.Expect(o => o.UpdateObserver()).Do((Action)(() => testObservable.Detach(observer3)));
observer3.Expect(o => o.UpdateObserver()).Repeat.Never(); // A detached observer should no longer be updated
observer4.Expect(o => o.UpdateObserver()).Do((Action)(() => testObservable.Attach(observer5)));
observer5.Expect(o => o.UpdateObserver()).Repeat.Never(); // An attached observer should not be updated too
observer6.Expect(o => o.UpdateObserver());
mocks.ReplayAll();
// Call
testObservable.NotifyObservers();
// Assert
mocks.VerifyAll();
}
public void GivenContextWithObserverAttached_WhenNotifyingLocationCalculationsElementInEnumerationToObserve_ThenObserverCorrectlyNotified()
{
// Given
var mockRepository = new MockRepository();
var observer = mockRepository.StrictMock <IObserver>();
observer.Expect(o => o.UpdateObserver());
mockRepository.ReplayAll();
var observable = new TestObservable();
var locationCalculationsEnumerationToObserve = new ObservableList <IObservable>
{
observable
};
var context = new TestLocationCalculationsContext(new object(), locationCalculationsEnumerationToObserve);
context.Attach(observer);
// When
observable.NotifyObservers();
// Then
mockRepository.VerifyAll();
}
public void RecursiveObserverObservingItemsInContainers_NotifyObserversAtSpecifiedLevel_UpdateObserversActionShouldBePerformed(int nestingLevel)
{
// Given
var counter = 0;
var rootContainer = new TestContainer();
TestContainer currentNestedContainer = rootContainer;
var currentTestObservable = new TestObservable();
InitializeHierarchy(nestingLevel, ref currentNestedContainer, ref currentTestObservable);
using (new RecursiveObserver <TestContainer, TestObservable>(() => counter++, GetChildren)
{
Observable = rootContainer
})
{
// When
currentTestObservable.NotifyObservers();
// Then
Assert.AreEqual(1, counter);
currentNestedContainer.NotifyObservers();
Assert.AreEqual(1, counter); // Nothing should have happened
}
}
public void RecursiveObserverObservingItemsInContainers_ContainerItemsRemoved_UpdateObserversActionShouldNoLongerBePerformed(int nestingLevel)
{
// Given
var counter = 0;
var rootContainer = new TestContainer();
TestContainer currentNestedContainer = rootContainer;
var currentTestObservable = new TestObservable();
InitializeHierarchy(nestingLevel, ref currentNestedContainer, ref currentTestObservable);
using (new RecursiveObserver <TestContainer, TestObservable>(() => counter++, GetChildren)
{
Observable = rootContainer
})
{
// When
rootContainer.Children.Clear();
rootContainer.NotifyObservers(); // Collection changes should always be notified
currentTestObservable.NotifyObservers();
// Then
Assert.AreEqual(0, counter);
}
}
public void Observer_WithObservableSetAndThenDisposed_NotifyObserversNoLongerResultsInPerformingUpdateObserversAction()
{
// Setup
var counter = 0;
var observable = new TestObservable();
var observer = new Observer(() => counter++)
{
Observable = observable
};
observer.Dispose();
// Call
observable.NotifyObservers();
// Assert
Assert.AreEqual(0, counter);
}
public void Observer_WithObservable_NotifyObserversResultsInPerformingUpdateObserversAction()
{
// Setup
var counter = 0;
var observable = new TestObservable();
using (new Observer(() => counter++)
{
Observable = observable
})
{
// Call
observable.NotifyObservers();
// Assert
Assert.AreEqual(1, counter);
}
}
public void NotifyObserver_AttachedObserverDetachedAgain_ObserverNoLongerNotified()
{
// Setup
var mocks = new MockRepository();
var observer = mocks.StrictMock <IObserver>();
mocks.ReplayAll();
var observable = new TestObservable();
observable.Attach(observer);
observable.Detach(observer);
// Call
observable.NotifyObservers();
// Assert
mocks.VerifyAll(); // Expect no calls on 'observer'
}
public void NotifyObservers_WithObserverAttached_ObserverIsNotified()
{
// Setup
var mocks = new MockRepository();
var observer = mocks.StrictMock <IObserver>();
observer.Expect(o => o.UpdateObserver()); // Expect to be called once
mocks.ReplayAll();
var observable = new TestObservable();
observable.Attach(observer);
// Call
observable.NotifyObservers();
// Assert
mocks.VerifyAll();
}
public void RecursiveObserverObservingItemsInContainers_RecursiveObserverDispose_UpdateObserversActionShouldNoLongerBePerformed(int nestingLevel)
{
// Given
var counter = 0;
var rootContainer = new TestContainer();
TestContainer currentNestedContainer = rootContainer;
var currentTestObservable = new TestObservable();
InitializeHierarchy(nestingLevel, ref currentNestedContainer, ref currentTestObservable);
var recursiveObserver = new RecursiveObserver <TestContainer, TestObservable>(() => counter++, GetChildren)
{
Observable = rootContainer
};
// When
recursiveObserver.Dispose();
currentTestObservable.NotifyObservers();
// Then
Assert.AreEqual(0, counter);
Assert.IsNull(recursiveObserver.Observable);
}
