/// <summary>
/// Creates a new <see cref="Subscriber"/> for the specified type of the source object.
/// </summary>
/// <param name="type">The type of the source object.</param>
/// <param name="observer">The underlying observer.</param>
/// <returns>A <see cref="Subscriber"/> for the <paramref name="type"/>.</returns>
private static Subscriber Create(Type type, PropertyObserver observer)
{
Subscriber subscriber = (Subscriber)Activator.CreateInstance(typeof(TSubscriber <>).MakeGenericType(type), true);
subscriber.observer = observer;
return(subscriber);
}
/// <summary>
/// Creates a new <see cref="Subscriber"/> for the specified type of the source object.
/// </summary>
/// <typeparam name="T">The type of the source object.</typeparam>
/// <param name="observer">The underlying observer.</param>
/// <returns>A <see cref="Subscriber"/> for the <typeparamref name="T"/>.</returns>
private static Subscriber Create <T>(PropertyObserver observer) where T : class, INotifyPropertyChanged
{
Subscriber subscriber = new TSubscriber <T>();
subscriber.observer = observer;
return(subscriber);
}
/// <summary>
/// Creates a new <see cref="Subscriber"/> for the specified source object.
/// </summary>
/// <typeparam name="T">The type of the source object.</typeparam>
/// <param name="source">The source object.</param>
/// <param name="observer">The underlying observer.</param>
/// <returns>A <see cref="Subscriber"/> for the <paramref name="source"/>.</returns>
internal static Subscriber Create <T>(T source, PropertyObserver observer) where T : class, INotifyPropertyChanged
{
Type type = source.GetType();
if (type == typeof(T))
{
return(Create <T>(observer));
}
return(Create(type, observer));
}
public void Test_01()
{
PropertyObserver observer = new PropertyObserver();
try
{
ISubscriber <Sample> observe = observer.Observe <Sample>(null);
Assert.Fail();
}
catch (ArgumentNullException e)
{
Assert.AreEqual("source", e.ParamName);
}
}
public void Test_14()
{
Sample sample = new Sample();
PropertyObserver observer = new PropertyObserver();
ISubscriber <Sample> observe = observer.Observe(sample);
observe.Subscribe(nameof(Sample.Prop1), Fail);
ISubscriber <Sample> subscriber = observe.Unsubscribe(nameof(Sample.Prop1), Fail);
sample.Prop1 = "Value";
sample.Prop2 = "Value";
Assert.AreSame(observe, subscriber);
public void Test_04()
{
Sample sample = new Sample();
PropertyObserver observer = new PropertyObserver();
ISubscriber <Sample> observe = observer.Observe(sample);
int count = 0;
ISubscriber <Sample> subscriber = observe.Subscribe(nameof(Sample.Prop1), () => { count++; });
sample.Update();
Assert.AreEqual(1, count);
Assert.AreSame(observe, subscriber);
}
public void Test_05()
{
Sample sample = new Sample();
PropertyObserver observer = new PropertyObserver();
ISubscriber <Sample> observe = observer.Observe(sample);
List <Sample> list = new List <Sample>();
ISubscriber <Sample> subscriber = observe.Subscribe(nameof(Sample.Prop1), s => { list.Add(s); });
sample.Update();
Assert.AreEqual(1, list.Count);
Assert.AreSame(sample, list[0]);
Assert.AreSame(observe, subscriber);
}
public void Test_12()
{
Sample sample = new Sample();
PropertyObserver observer = new PropertyObserver();
ISubscriber <Sample> observe = observer.Observe(sample);
int count = 0;
ISubscriber <Sample> subscriber = observe.Subscribe(() => { count++; });
sample.Prop1 = "Value";
sample.Prop2 = "Value";
Assert.AreEqual(2, count);
Assert.AreSame(observe, subscriber);
}
public void Test_09()
{
Sample sample = new Sample();
PropertyObserver observer = new PropertyObserver();
ISubscriber <Sample> observe = observer.Observe(sample);
List <Sample> list = new List <Sample>();
ISubscriber <Sample> subscriber = observe.Subscribe(null, s => { list.Add(s); });
sample.Prop1 = "Value";
sample.Prop2 = "Value";
Assert.AreEqual(0, list.Count);
Assert.AreSame(observe, subscriber);
}