public void IgnoresPropertyLambda()
{
var source = new WithIllegal();
var settings = new PropertiesSettingsBuilder().IgnoreProperty <WithIllegal>(x => x.Illegal)
.CreateSettings(ReferenceHandling.Structural);
var propertyChanges = new List <string>();
var changes = new List <EventArgs>();
using (var tracker = Track.Changes(source, settings))
{
tracker.PropertyChanged += (_, e) => propertyChanges.Add(e.PropertyName);
tracker.Changed += (_, e) => changes.Add(e);
Assert.AreEqual(0, tracker.Changes);
CollectionAssert.IsEmpty(propertyChanges);
CollectionAssert.IsEmpty(changes);
source.Value++;
Assert.AreEqual(1, tracker.Changes);
CollectionAssert.AreEqual(new[] { "Changes" }, propertyChanges);
var expected = new[] { RootChangeEventArgs.Create(ChangeTrackerNode.GetOrCreate(source, tracker.Settings, isRoot: false).Value, new PropertyChangeEventArgs(source, source.GetProperty(nameof(source.Value)))) };
CollectionAssert.AreEqual(expected, changes, EventArgsComparer.Default);
source.Illegal = new IllegalType();
Assert.AreEqual(1, tracker.Changes);
CollectionAssert.AreEqual(new[] { "Changes" }, propertyChanges);
CollectionAssert.AreEqual(expected, changes, EventArgsComparer.Default);
}
}
public void WithIllegal()
{
var expected = // "Track.Changes(x, y) failed for item: ObservableCollection<ComplexType>[0].Illegal.\r\n" +
"Track.Changes(x, y) failed.\r\n" +
"The type IllegalType does not notify changes.\r\n" +
"The property WithIllegal.Illegal of type IllegalType is not supported.\r\n" +
"Solve the problem by any of:\r\n" +
"* Implement INotifyPropertyChanged for IllegalType or use a type that does.\r\n" +
"* Make IllegalType immutable or use an immutable type.\r\n" +
" - For immutable types the following must hold:\r\n" +
" - Must be a sealed class or a struct.\r\n" +
" - All fields and properties must be readonly.\r\n" +
" - All field and property types must be immutable.\r\n" +
" - All indexers must be readonly.\r\n" +
" - Event fields are ignored.\r\n" +
"* Use PropertiesSettings and specify how change tracking is performed:\r\n" +
" - ReferenceHandling.Structural means that a the entire graph is tracked.\r\n" +
" - ReferenceHandling.References means that only the root level changes are tracked.\r\n" +
" - Exclude a combination of the following:\r\n" +
" - The property WithIllegal.Illegal.\r\n" +
" - The type IllegalType.\r\n";
var item = new WithIllegal();
var settings = PropertiesSettings.GetOrCreate();
var exception = Assert.Throws <NotSupportedException>(() => Track.Changes(item, settings));
Assert.AreEqual(expected, exception.Message);
exception = Assert.Throws <NotSupportedException>(() => Track.Changes(item));
Assert.AreEqual(expected, exception.Message);
}
public void IgnoresPropertyLambda()
{
var source = new WithIllegal();
var settings = new PropertiesSettingsBuilder().IgnoreProperty<WithIllegal>(x => x.Illegal)
.CreateSettings(ReferenceHandling.Structural);
var propertyChanges = new List<string>();
var changes = new List<EventArgs>();
using (var tracker = Track.Changes(source, settings))
{
tracker.PropertyChanged += (_, e) => propertyChanges.Add(e.PropertyName);
tracker.Changed += (_, e) => changes.Add(e);
Assert.AreEqual(0, tracker.Changes);
CollectionAssert.IsEmpty(propertyChanges);
CollectionAssert.IsEmpty(changes);
source.Value++;
Assert.AreEqual(1, tracker.Changes);
CollectionAssert.AreEqual(new[] { "Changes" }, propertyChanges);
var expected = new[] { RootChangeEventArgs.Create(ChangeTrackerNode.GetOrCreate(source, tracker.Settings, false).Value, new PropertyChangeEventArgs(source, source.GetProperty(nameof(source.Value)))) };
CollectionAssert.AreEqual(expected, changes, EventArgsComparer.Default);
source.Illegal = new IllegalType();
Assert.AreEqual(1, tracker.Changes);
CollectionAssert.AreEqual(new[] { "Changes" }, propertyChanges);
CollectionAssert.AreEqual(expected, changes, EventArgsComparer.Default);
}
}
