/// <summary>
/// Sets the <see cref="IsChanged"/> flag to true manually.
/// </summary>
public void SetChanged()
{
// the order of these two operations is important
// to keep the service in a consistent state
IsChanged = true;
if (ChangeTrackingService != null)
{
ChangeTrackingService.Add(this);
}
OnSetChanged();
}
public void Add_UnchangedObjectIsAdded_ThrowsException()
{
_InitializeDependencies();
// stub change tracking object
var changedObject = new Mock <IChangeTracking>();
changedObject.Setup(o => o.IsChanged)
.Returns(false);
var target = new ChangeTrackingService();
target.Add(changedObject.Object);
}
public void Add_ChangedObjectIsAdded_HasChangesIsTrue()
{
_InitializeDependencies();
// stub change tracking object
var changedObject = new Mock <IChangeTracking>();
changedObject.Setup(o => o.IsChanged)
.Returns(true);
var target = new ChangeTrackingService();
target.Add(changedObject.Object);
Assert.IsTrue(target.HasChanges);
}
public void Add_ChangedObjectIsAdded_RaisesHasChangesChangedEvent()
{
_InitializeDependencies();
// stub change tracking object
var changedObject = new Mock <IChangeTracking>();
changedObject.Setup(o => o.IsChanged)
.Returns(true);
bool eventWasRaised = false;
var target = new ChangeTrackingService();
target.HasChangesChanged += (o, e) => eventWasRaised = true;
target.Add(changedObject.Object);
Assert.IsTrue(eventWasRaised);
}
public void HasChanges_ChangedObjectIsResetToUnchangedButNotRemoved_ThrowsException()
{
_InitializeDependencies();
// stub change tracking object
var changedObject = new Mock <IChangeTracking>();
changedObject.Setup(o => o.IsChanged)
.Returns(true);
var target = new ChangeTrackingService();
target.Add(changedObject.Object);
// reset change (cannot be detected by service)
changedObject.Setup(o => o.IsChanged)
.Returns(false);
// successive access to "HasChanges" shall detect invalid state
var hasChanges = target.HasChanges;
}