/// <summary>
/// This method is called whenever a change is made to an EntityObject
/// property.
/// </summary>
/// <param name="property"> The name of the changed property. </param>
/// <exception cref="System.ArgumentNullException">When parameter member is null (Nothing in Visual Basic).</exception>
protected override sealed void ReportPropertyChanged(
string property)
{
Check.NotEmpty(property, "property");
Debug.Assert(
EntityChangeTracker != null,
"EntityChangeTracker should never return null -- if detached it should be return _detachedEntityChangeTracker");
EntityChangeTracker.EntityMemberChanged(property);
base.ReportPropertyChanged(property);
}
public void ShouldDetachUnmodifiedEntity()
{
var detector = new TestEntityChangeDetector();
EntityChangeTracker <TestEntity> tracker = new EntityChangeTracker <TestEntity>(detector);
TestEntity entity = new TestEntity();
tracker.Attach(entity);
tracker.Detach(entity);
var change = tracker.DetectChanges(entity);
Assert.AreEqual(EntityState.Detached, change.State, "Detaching an Unmodified entity should make it Detached.");
}
public void ShouldDetatchAddedEntitiesThatAreRemoved()
{
var detector = new TestEntityChangeDetector();
EntityChangeTracker <TestEntity> tracker = new EntityChangeTracker <TestEntity>(detector);
TestEntity entity = new TestEntity();
tracker.Add(entity);
tracker.Remove(entity);
var change = tracker.DetectChanges(entity);
Assert.AreEqual(EntityState.Detached, change.State, "The entity should have been Detached.");
}
public void ShouldLeaveUnmodifedAfterAttachingRemovedEntity()
{
var detector = new TestEntityChangeDetector();
EntityChangeTracker <TestEntity> tracker = new EntityChangeTracker <TestEntity>(detector);
TestEntity entity = new TestEntity();
tracker.Remove(entity);
tracker.Attach(entity);
var change = tracker.DetectChanges(entity);
Assert.AreEqual(EntityState.Unmodified, change.State, "Attaching a Removed entity should make it Unmodified.");
}
public void ShouldLeaveDetachedEntityDetached()
{
var detector = new TestEntityChangeDetector();
EntityChangeTracker <TestEntity> tracker = new EntityChangeTracker <TestEntity>(detector);
TestEntity entity = new TestEntity();
// Do not attach the entit, so Detach does nothing
Assert.IsFalse(tracker.Detach(entity), "Should not be indicating the item was detached.");
var change = tracker.DetectChanges(entity);
Assert.AreEqual(EntityState.Detached, change.State, "Detaching a Detached entity should leave it Detached.");
}
public void ShouldNotDetectAddedAfterCommitting()
{
var detector = new TestEntityChangeDetector();
EntityChangeTracker <TestEntity> tracker = new EntityChangeTracker <TestEntity>(detector);
TestEntity entity = new TestEntity();
tracker.Add(entity);
tracker.CommitChanges();
var change = tracker.DetectChanges(entity);
Assert.AreEqual(EntityState.Unmodified, change.State, "The entity should be Unmodified after committing.");
}
public void ShouldMarkRemovedAsDetachedAfterCommitting()
{
var detector = new TestEntityChangeDetector();
EntityChangeTracker <TestEntity> tracker = new EntityChangeTracker <TestEntity>(detector);
TestEntity entity = new TestEntity();
tracker.Attach(entity);
tracker.Remove(entity);
tracker.CommitChanges();
var change = tracker.DetectChanges(entity);
Assert.AreEqual(EntityState.Detached, change.State, "The entity should be Detached after committing.");
}
public void ShouldDetectAddedByDefault()
{
var detector = new TestEntityChangeDetector();
EntityChangeTracker <TestEntity> tracker = new EntityChangeTracker <TestEntity>(detector);
TestEntity entity = new TestEntity();
tracker.Add(entity);
var changes = tracker.DetectChanges();
Assert.AreEqual(1, changes.Count(), "The entity should have been seen as changed.");
var change = changes.Single();
Assert.AreSame(entity, change.Entity, "The wrong entity was returned.");
Assert.AreEqual(EntityState.Added, change.State, "The entity was not added.");
}
public void ShouldRemainAddedAfterAddingTwice()
{
var detector = new TestEntityChangeDetector();
EntityChangeTracker <TestEntity> tracker = new EntityChangeTracker <TestEntity>(detector);
TestEntity entity = new TestEntity();
tracker.Add(entity);
var before = tracker.DetectChanges(entity);
Assert.AreEqual(EntityState.Added, before.State, "The entity should have been Added to start with.");
tracker.Add(entity);
var after = tracker.DetectChanges(entity);
Assert.AreEqual(EntityState.Added, after.State, "The entity should have remained Added.");
}
public void ShouldAllowRetrievingUnmodifiedEntities()
{
var detector = new TestEntityChangeDetector();
EntityChangeTracker <TestEntity> tracker = new EntityChangeTracker <TestEntity>(detector);
TestEntity entity = new TestEntity();
tracker.Attach(entity);
var changes = tracker.DetectChanges(EntityState.Unmodified);
Assert.AreEqual(1, changes.Count(), "The entity should have been seen as changed.");
var change = changes.Single();
Assert.AreSame(entity, change.Entity, "The wrong entity was returned.");
Assert.AreEqual(EntityState.Unmodified, change.State, "The entity was not unmodified.");
}
public void ShouldNotDetectChangesAfterCommitting()
{
var detector = new TestEntityChangeDetector();
EntityChangeTracker <TestEntity> tracker = new EntityChangeTracker <TestEntity>(detector);
TestEntity entity = new TestEntity()
{
IntValue = 1234
};
tracker.Attach(entity);
entity.IntValue = 234; // Should make the entity Modified
tracker.CommitChanges();
var change = tracker.DetectChanges(entity);
Assert.AreEqual(EntityState.Unmodified, change.State, "The entity should be Unmodified after committing.");
}
public void ShouldDetectChanges_Modified()
{
var detector = new TestEntityChangeDetector();
EntityChangeTracker <TestEntity> tracker = new EntityChangeTracker <TestEntity>(detector);
TestEntity entity = new TestEntity()
{
BooleanValue = false,
DateTimeValue = new DateTime(2015, 07, 29),
GuidValue = Guid.NewGuid(),
IntValue = 123,
MoneyValue = 12.34m,
PercentValue = 12.5m,
StringValue = "Hello"
};
tracker.Attach(entity);
entity.BooleanValue = true;
entity.DateTimeValue = new DateTime(2015, 07, 30);
entity.GuidValue = Guid.NewGuid();
entity.IntValue = 234;
entity.MoneyValue = 10m;
entity.PercentValue = 15m;
entity.StringValue = "Goodbye";
var changes = tracker.DetectChanges();
Assert.AreEqual(1, changes.Count(), "The wrong number of changed entities were detected.");
var change = changes.Single();
Assert.AreSame(entity, change.Entity, "The wrong entity was returned.");
Assert.AreEqual(EntityState.Modified, change.State, "The entity was not marked as modified.");
Assert.AreEqual(7, change.GetChanges().Count(), "The wrong number of changes were detected.");
Assert.IsTrue(change.HasChange(e => e.BooleanValue), "Boolean value should be changed.");
Assert.IsTrue(change.HasChange(e => e.DateTimeValue), "DateTime value should be changed.");
Assert.IsTrue(change.HasChange(e => e.GuidValue), "Guid value should be changed.");
Assert.IsTrue(change.HasChange(e => e.IntValue), "Int value should be changed.");
Assert.IsTrue(change.HasChange(e => e.MoneyValue), "Money value should be changed.");
Assert.IsTrue(change.HasChange(e => e.PercentValue), "Percent value should be changed.");
Assert.IsTrue(change.HasChange(e => e.StringValue), "String value should be changed.");
}
public void ShouldDetectChangeToDerivedPropertyWhenAdding()
{
var detector = new DerivedChangeDetector();
var tracker = new EntityChangeTracker <TestEntity>(detector);
DerivedEntity entity = new DerivedEntity()
{
DerivedValue = 123
};
tracker.Add(entity);
var changes = tracker.DetectChanges();
Assert.AreEqual(1, changes.Count(), "The wrong number of changes were detected.");
IEntityChange <TestEntity> change = changes.Single();
Assert.AreSame(entity, change.Entity, "A change was detected on the wrong entity.");
Assert.AreEqual(EntityState.Added, change.State, "The entity should have been modified.");
Assert.AreEqual(1, change.GetChanges().Count(), "The wrong number of properties were seen as changed.");
}
public void ShouldLeaveModifiedWhenAddingRemovedEntity()
{
var detector = new TestEntityChangeDetector();
EntityChangeTracker <TestEntity> tracker = new EntityChangeTracker <TestEntity>(detector);
TestEntity entity = new TestEntity()
{
IntValue = 123
};
tracker.Attach(entity);
tracker.Remove(entity);
tracker.Add(entity);
entity.IntValue = 234;
var change = tracker.DetectChanges(entity);
Assert.AreEqual(EntityState.Modified, change.State, "Adding a Removed entity that was changed should make it Modified.");
Assert.IsTrue(change.HasChange(x => x.IntValue), "The modified value does not reflect the latest value.");
}
public void ShouldRetainModificationIfAttachedTwice()
{
var detector = new TestEntityChangeDetector();
EntityChangeTracker <TestEntity> tracker = new EntityChangeTracker <TestEntity>(detector);
TestEntity entity = new TestEntity()
{
IntValue = 123
};
tracker.Attach(entity);
var before = tracker.DetectChanges(entity);
Assert.AreEqual(EntityState.Unmodified, before.State, "The entity should have been Unmodified to start with.");
entity.IntValue = 234;
tracker.Attach(entity); // Should not wipe out changes
var after = tracker.DetectChanges(entity);
Assert.AreEqual(EntityState.Modified, after.State, "The entity should have become Modified.");
}
public void ShouldIncludeChangeToDoubleDerivedProperty()
{
var detector = new DoubleDerivedChangeDetector();
var tracker = new EntityChangeTracker <TestEntity>(detector);
DoubleDerivedEntity entity = new DoubleDerivedEntity()
{
DoubleDerivedValue = "John"
};
tracker.Attach(entity);
entity.DoubleDerivedValue = "Tom";
var changes = tracker.DetectChanges();
Assert.AreEqual(1, changes.Count(), "The wrong number of changes were detected.");
IEntityChange <TestEntity> change = changes.Single();
Assert.AreSame(entity, change.Entity, "A change was detected on the wrong entity.");
Assert.AreEqual(EntityState.Modified, change.State, "The entity should have been modified.");
Assert.AreEqual(1, change.GetChanges().Count(), "The wrong number of properties were seen as changed.");
}
public void ShouldDetectMostRecentChangesForAdded()
{
var detector = new TestEntityChangeDetector();
EntityChangeTracker <TestEntity> tracker = new EntityChangeTracker <TestEntity>(detector);
TestEntity entity = new TestEntity()
{
IntValue = 123
};
tracker.Add(entity);
entity.IntValue = 234;
var after = tracker.DetectChanges(entity);
Assert.AreEqual(EntityState.Added, after.State, "The entity should have remained Added.");
Assert.IsTrue(after.HasChange(x => x.IntValue), "The IntValue should have changed.");
var change = after.GetChange(x => x.IntValue);
Assert.IsNotNull(change, "The change was null after detecting its prescence.");
Assert.AreEqual(234, change.UpdatedValue, "The latest value was not returned.");
}
