public void ShouldDetectChanges_Added()
{
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.Add(entity);
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.Added, 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 ShouldDetectMostRecentChangesForRemoved()
{
var detector = new TestEntityChangeDetector();
EntityChangeTracker <TestEntity> tracker = new EntityChangeTracker <TestEntity>(detector);
TestEntity entity = new TestEntity()
{
IntValue = 123
};
tracker.Attach(entity);
tracker.Remove(entity);
entity.IntValue = 234;
var change = tracker.DetectChanges(entity);
Assert.AreEqual(EntityState.Removed, change.State, "The entity should have remained Added.");
Assert.IsTrue(change.HasChange(x => x.IntValue), "The IntValue should have changed.");
var propertyChange = change.GetChange(x => x.IntValue);
Assert.IsNotNull(propertyChange, "The change was null after detecting its prescence.");
Assert.AreEqual(234, propertyChange.OriginalValue, "The latest value was not returned.");
}
public void ShouldThrowExceptionIfAccessorRefersToNonProperty_HasChanges()
{
var detector = new TestEntityChangeDetector();
TestEntity original = new TestEntity();
TestEntity updated = new TestEntity();
detector.HasChange(e => e.Field, original, updated);
}
public void ShouldLeaveDetachedIfRemovingDetachedEntity()
{
var detector = new TestEntityChangeDetector();
EntityChangeTracker <TestEntity> tracker = new EntityChangeTracker <TestEntity>(detector);
TestEntity entity = new TestEntity();
Assert.IsFalse(tracker.Remove(entity), "Should not have indicated the entity was removed when it was Detached.");
}
public void ShouldReturnFalseIfCheckingIfUnconfiguredPropertyChanged()
{
var detector = new TestEntityChangeDetector();
TestEntity original = new TestEntity();
TestEntity updated = new TestEntity();
bool hasChange = detector.HasChange(a => a.NotConfigured, original, updated);
Assert.IsFalse(hasChange, "A change should not be detected if the property is not recognized.");
}
public void ShouldThrowExceptionIfAccessorNull_HasChanges()
{
var detector = new TestEntityChangeDetector();
TestEntity original = new TestEntity();
TestEntity updated = new TestEntity();
Expression <Func <TestEntity, int> > accessor = null;
detector.HasChange(accessor, original, updated);
}
public void ShouldNotDetectChange_OriginalAndUpdatedNull()
{
var detector = new TestEntityChangeDetector();
TestEntity original = null;
TestEntity updated = null;
Assert.IsFalse(detector.HasChange(a => a.StringValue, original, updated), "Change detected for the property.");
var changes = detector.GetChanges(original, updated);
Assert.AreEqual(0, changes.Count(), "The wrong number of changes were detected.");
}
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 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 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 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 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 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 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 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 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 ShouldDetectChange_UpdatedNull()
{
var detector = new TestEntityChangeDetector();
TestEntity original = new TestEntity()
{
StringValue = "After"
};
TestEntity updated = null;
Assert.IsTrue(detector.HasChange(a => a.StringValue, original, updated), "No change detected for the property.");
var changes = detector.GetChanges(original, updated);
Assert.AreEqual(1, changes.Count(), "The wrong number of changes were detected.");
IPropertyChange change = changes.Single();
Assert.AreEqual(TestEntityChangeDetector.StringDescription, change.DisplayName, "The wrong property was recorded.");
Assert.AreEqual(Formatters.FormatString(original.StringValue), change.FormatOriginalValue(), "The old value was not recorded.");
Assert.AreEqual(null, change.FormatUpdatedValue(), "The new value was not recorded.");
}
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 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.");
}
public void ShouldDetectAllChanges()
{
var detector = new TestEntityChangeDetector();
TestEntity original = new TestEntity()
{
BooleanValue = false,
DateTimeValue = new DateTime(2015, 07, 29),
GuidValue = Guid.NewGuid(),
IntValue = 123,
MoneyValue = 12.34m,
PercentValue = 12.5m,
StringValue = "Hello"
};
TestEntity updated = new TestEntity()
{
BooleanValue = true,
DateTimeValue = new DateTime(2015, 07, 30),
GuidValue = Guid.NewGuid(),
IntValue = 234,
MoneyValue = 10m,
PercentValue = 15m,
StringValue = "Goodbye"
};
Assert.IsTrue(detector.HasChange(e => e.BooleanValue, original, updated), "Boolean value should be changed.");
Assert.IsTrue(detector.HasChange(e => e.DateTimeValue, original, updated), "DateTime value should be changed.");
Assert.IsTrue(detector.HasChange(e => e.GuidValue, original, updated), "Guid value should be changed.");
Assert.IsTrue(detector.HasChange(e => e.IntValue, original, updated), "Int value should be changed.");
Assert.IsTrue(detector.HasChange(e => e.MoneyValue, original, updated), "Money value should be changed.");
Assert.IsTrue(detector.HasChange(e => e.PercentValue, original, updated), "Percent value should be changed.");
Assert.IsTrue(detector.HasChange(e => e.StringValue, original, updated), "String value should be changed.");
var changes = detector.GetChanges(original, updated);
Assert.AreEqual(7, changes.Count(), "The wrong number of changes were detected.");
}
