public void OtherPropertyChanged()
{
var propertyChanged = new MyNotifyPropertyChanged();
Assert.PropertyChanged(propertyChanged, "Property1", () => propertyChanged.Property2 = 42);
}
public void ActualPropertyChanged()
{
var propertyChanged = new MyNotifyPropertyChanged();
Assert.PropertyChanged(propertyChanged, "Property1", () => propertyChanged.Property1 = "NewValue");
}
public void ShouldNotifySubscribersAboutValueChangesWhileItemsAreInDictionary()
{
// given
var scheduler = new TestScheduler();
int key = 1;
var testInpcImplementationInstance = new MyNotifyPropertyChanged<int, string>(key);
var observer = scheduler.CreateObserver<IObservableDictionaryChange<int, MyNotifyPropertyChanged<int, string>>>();
var itemChangesObserver = scheduler.CreateObserver<IObservableDictionaryChange<int, MyNotifyPropertyChanged<int, string>>>();
var collectionItemChangesObserver = scheduler.CreateObserver<IObservableCollectionChange<KeyValuePair<int, MyNotifyPropertyChanged<int, string>>>>();
using (var observableDictionary = new ObservableDictionary<int, MyNotifyPropertyChanged<int, string>>(scheduler: scheduler))
{
observableDictionary.ThresholdAmountWhenChangesAreNotifiedAsReset = int.MaxValue;
IDisposable dictionaryChangesSubscription = null;
IDisposable dictionaryItemChangesSubscription = null;
IDisposable observableCollectionItemChangesSubscription = null;
try
{
dictionaryChangesSubscription = observableDictionary.DictionaryChanges.Subscribe(observer);
dictionaryItemChangesSubscription = observableDictionary.ValueChanges.Subscribe(itemChangesObserver);
observableCollectionItemChangesSubscription = ((INotifyObservableCollectionItemChanges<KeyValuePair<int, MyNotifyPropertyChanged<int, string>>>)observableDictionary)
.CollectionItemChanges
.Subscribe(collectionItemChangesObserver);
// when
observableDictionary.Add(key, testInpcImplementationInstance);
testInpcImplementationInstance.FirstProperty = Guid.NewGuid().ToString();
scheduler.AdvanceBy(100);
// then
observer.Messages.Count.Should().Be(2);
itemChangesObserver.Messages.Count.Should().Be(1);
collectionItemChangesObserver.Messages.Count.Should().Be(1);
observer.Messages.First().Value.Value.ChangeType.Should().Be(ObservableDictionaryChangeType.ItemAdded);
observer.Messages.First().Value.Value.Key.Should().Be(key);
observer.Messages.First().Value.Value.Value.Should().Be(testInpcImplementationInstance);
observer.Messages.Last().Value.Value.ChangeType.Should().Be(ObservableDictionaryChangeType.ItemValueChanged);
observer.Messages.Last().Value.Value.Key.Should().Be(default(int));
observer.Messages.Last().Value.Value.Value.Should().Be(testInpcImplementationInstance);
observer.Messages.Last().Value.Value.OldValue.Should().BeNull();
observer.Messages.Last().Value.Value.ChangedPropertyName.Should().Be(nameof(MyNotifyPropertyChanged<int, string>.FirstProperty));
itemChangesObserver.Messages.First().Value.Value.ChangeType.Should().Be(ObservableDictionaryChangeType.ItemValueChanged);
itemChangesObserver.Messages.First().Value.Value.Key.Should().Be(default(int));
itemChangesObserver.Messages.First().Value.Value.Value.Should().Be(testInpcImplementationInstance);
itemChangesObserver.Messages.First().Value.Value.OldValue.Should().BeNull();
itemChangesObserver.Messages.Last().Value.Value.ChangedPropertyName.Should().Be(nameof(MyNotifyPropertyChanged<int, string>.FirstProperty));
collectionItemChangesObserver.Messages.First().Value.Value.ChangeType.Should().Be(ObservableCollectionChangeType.ItemChanged);
collectionItemChangesObserver.Messages.First().Value.Value.Item.Key.Should().Be(key);
collectionItemChangesObserver.Messages.First().Value.Value.Item.Value.Should().Be(testInpcImplementationInstance);
}
finally
{
dictionaryChangesSubscription?.Dispose();
dictionaryItemChangesSubscription?.Dispose();
observableCollectionItemChangesSubscription?.Dispose();
}
}
}
public void ShouldNotifySubscribersAboutKeyChangesAsResetIfRequestedWhileItemsAreInDictionary()
{
// given
var scheduler = new TestScheduler();
int value = 1;
var key = new MyNotifyPropertyChanged<int, string>(value);
var observer = scheduler.CreateObserver<IObservableDictionaryChange<MyNotifyPropertyChanged<int, string>, int>>();
var itemChangesObserver = scheduler.CreateObserver<IObservableDictionaryChange<MyNotifyPropertyChanged<int, string>, int>>();
var resetsObserver = scheduler.CreateObserver<Unit>();
using (var observableDictionary = new ObservableDictionary<MyNotifyPropertyChanged<int, string>, int>(scheduler: scheduler))
{
observableDictionary.ThresholdAmountWhenChangesAreNotifiedAsReset = Int32.MaxValue;
IDisposable dictionaryChangesSubscription = null;
IDisposable dictionaryItemChangesSubscription = null;
IDisposable dictionaryResetsSubscription = null;
try
{
dictionaryChangesSubscription = observableDictionary.DictionaryChanges.Subscribe(observer);
dictionaryItemChangesSubscription = observableDictionary.KeyChanges.Subscribe(itemChangesObserver);
dictionaryResetsSubscription = observableDictionary.Resets.Subscribe(resetsObserver);
// when
observableDictionary.Add(key, value);
observableDictionary.ThresholdAmountWhenChangesAreNotifiedAsReset = 0;
key.FirstProperty = Guid.NewGuid().ToString();
scheduler.AdvanceBy(100);
// then
observer.Messages.Count.Should().Be(2);
itemChangesObserver.Messages.Count.Should().Be(0);
resetsObserver.Messages.Count.Should().Be(1);
observer.Messages.First().Value.Value.ChangeType.Should().Be(ObservableDictionaryChangeType.ItemAdded);
observer.Messages.First().Value.Value.Key.Should().Be(key);
observer.Messages.First().Value.Value.Value.Should().Be(value);
observer.Messages.Last().Value.Value.ChangeType.Should().Be(ObservableDictionaryChangeType.Reset);
observer.Messages.Last().Value.Value.Key.Should().Be(default(MyNotifyPropertyChanged<int, string>));
observer.Messages.Last().Value.Value.Value.Should().Be(default(int));
observer.Messages.Last().Value.Value.OldValue.Should().Be(default(int));
observer.Messages.Last().Value.Value.ChangedPropertyName.Should().BeEmpty();
}
finally
{
dictionaryChangesSubscription?.Dispose();
dictionaryItemChangesSubscription?.Dispose();
dictionaryResetsSubscription?.Dispose();
}
}
}
public void ShouldNotNotifySubscribersAboutValueChangesAfterItemsAreRemovedFromDictionary()
{
// given
var scheduler = new TestScheduler();
int key = 1;
var testInpcImplementationInstance = new MyNotifyPropertyChanged<int, string>(key);
var observer = scheduler.CreateObserver<IObservableDictionaryChange<int, MyNotifyPropertyChanged<int, string>>>();
var itemChangesObserver = scheduler.CreateObserver<IObservableDictionaryChange<int, MyNotifyPropertyChanged<int, string>>>();
using (var observableDictionary = new ObservableDictionary<int, MyNotifyPropertyChanged<int, string>>(scheduler: scheduler))
{
observableDictionary.ThresholdAmountWhenChangesAreNotifiedAsReset = int.MaxValue;
IDisposable dictionaryChangesSubscription = null;
IDisposable dictionaryItemChangesSubscription = null;
try
{
dictionaryChangesSubscription = observableDictionary.DictionaryChanges.Subscribe(observer);
dictionaryItemChangesSubscription = observableDictionary.ValueChanges.Subscribe(itemChangesObserver);
// when
observableDictionary.Add(key, testInpcImplementationInstance); // first general message - ItemAdd
testInpcImplementationInstance.FirstProperty = Guid.NewGuid().ToString(); // second general / first item change message - ItemChanged
observableDictionary.Remove(key); // third general message - ItemRemoved
testInpcImplementationInstance.SecondProperty = Guid.NewGuid().ToString(); // should no longer be observable on/via dictionary
scheduler.AdvanceBy(100);
// then
observer.Messages.Count.Should().Be(3);
observer.Messages[0].Value.Value.ChangeType.Should().Be(ObservableDictionaryChangeType.ItemAdded);
observer.Messages[0].Value.Value.Key.Should().Be(key);
observer.Messages[0].Value.Value.Value.Should().Be(testInpcImplementationInstance);
observer.Messages[1].Value.Value.ChangeType.Should().Be(ObservableDictionaryChangeType.ItemValueChanged);
observer.Messages[1].Value.Value.Key.Should().Be(default(int));
observer.Messages[1].Value.Value.Value.Should().Be(testInpcImplementationInstance);
observer.Messages[1].Value.Value.OldValue.Should().BeNull();
observer.Messages[1].Value.Value.ChangedPropertyName.Should().Be(nameof(MyNotifyPropertyChanged<int, string>.FirstProperty));
observer.Messages[2].Value.Value.ChangeType.Should().Be(ObservableDictionaryChangeType.ItemRemoved);
observer.Messages[2].Value.Value.Key.Should().Be(key);
observer.Messages[2].Value.Value.Value.Should().Be(testInpcImplementationInstance);
itemChangesObserver.Messages.Count.Should().Be(1);
itemChangesObserver.Messages.First().Value.Value.ChangeType.Should().Be(ObservableDictionaryChangeType.ItemValueChanged);
itemChangesObserver.Messages.First().Value.Value.Key.Should().Be(default(int));
itemChangesObserver.Messages.First().Value.Value.Value.Should().Be(testInpcImplementationInstance);
itemChangesObserver.Messages.First().Value.Value.OldValue.Should().BeNull();
itemChangesObserver.Messages.First().Value.Value.ChangedPropertyName.Should().Be(nameof(MyNotifyPropertyChanged<int, string>.FirstProperty));
}
finally
{
dictionaryChangesSubscription?.Dispose();
dictionaryItemChangesSubscription?.Dispose();
}
}
}