public void HasChanged_Returns_True_For_Unsaved_Entity()
{
// arrange
var propertyChangeTracker = new PropertyChangeTracker(new Artist());
// act
var result = propertyChangeTracker.HasChanged <Artist>(x => x.Name);
// assert
Assert.True(result);
}
public void AddCollectionChangedItem_Adds_ChangedItem(CollectionChangeType changeType)
{
// arrange
var entity = TestHelper.CreateEntityWithId <Artist>(1);
var propertyChangeTracker = new PropertyChangeTracker(entity);
// act
propertyChangeTracker.AddCollectionChangedItem(new CollectionChangedItem("StatisticValues", null, changeType));
// assert
Assert.True(propertyChangeTracker.HasChanged <Artist>(x => x.StatisticValues));
}
public void HasChanged_Returns_True_For_Newly_Created_Entity_ForeignKey()
{
// arrange
var entity = TestHelper.CreateEntityWithId <Artist>(1);
var propertyChangeTracker = new PropertyChangeTracker(entity);
propertyChangeTracker.AddPropertyChangedItem <Artist>(x => x.FK_AnotherArtist_ID, 0, 0);
// act
var result = propertyChangeTracker.HasChanged <Artist>(x => x.FK_AnotherArtist_ID);
// assert
Assert.True(result);
}
public void HasChanged_Works()
{
// arrange
var entity = TestHelper.CreateEntityWithId <Artist>(1);
var propertyChangeTracker = new PropertyChangeTracker(entity);
propertyChangeTracker.AddPropertyChangedItem <Artist>(x => x.Name, "OldValue", "NewValue");
// act
var result = propertyChangeTracker.HasChanged <Artist>(x => x.Name);
// assert
Assert.True(result);
}
public void HasChanged_Should_Not_Track_Property_Changes_With_The_Same_NewValue_As_The_Old_Value()
{
// arrange
var entity = TestHelper.CreateEntityWithId <Artist>(1);
var propertyChangeTracker = new PropertyChangeTracker(entity);
propertyChangeTracker.AddPropertyChangedItem <Artist>(x => x.Name, "TestValue", "TestValue");
// act
var result = propertyChangeTracker.HasChanged <Artist>(x => x.Name);
// assert
Assert.False(result);
}
public void AddPropertyChangedItem_Does_Nothing_When_Tracking_Is_Disabled()
{
// arrange
var entity = TestHelper.CreateEntityWithId <Artist>(1);
var propertyChangeTracker = new PropertyChangeTracker(entity);
propertyChangeTracker.DisableChangeTracking = true;
propertyChangeTracker.AddPropertyChangedItem <Artist>(x => x.Name, "OldValue", "NewValue");
// act
var result = propertyChangeTracker.HasChanged <Artist>(x => x.Name);
// asset
Assert.False(result);
}
public void AddCollectionChangedItem_Does_Nothing_When_Tracking_Is_Disabled(bool disableChangeTracking)
{
// arrange
var entity = TestHelper.CreateEntityWithId <Artist>(1);
var propertyChangeTracker = new PropertyChangeTracker(entity)
{
DisableChangeTracking = disableChangeTracking
};
// act
propertyChangeTracker.AddCollectionChangedItem(new CollectionChangedItem("StatisticValues", null, CollectionChangeType.Added));
// assert
Assert.Equal(!disableChangeTracking, propertyChangeTracker.HasChanged <Artist>(x => x.StatisticValues));
}
public void AddCollectionChangedItem_Prevents_Unneccessary_Changes(CollectionChangeType changeType)
{
// arrange
var entity = TestHelper.CreateEntityWithId <Artist>(1);
var propertyChangeTracker = new PropertyChangeTracker(entity);
var oppositeChangeType = changeType == CollectionChangeType.Added ? CollectionChangeType.Removed : CollectionChangeType.Added;
var statisticValue = new ArtistStatisticValues();
// act
propertyChangeTracker.AddCollectionChangedItem(new CollectionChangedItem("StatisticValues", statisticValue, changeType));
propertyChangeTracker.AddCollectionChangedItem(new CollectionChangedItem("StatisticValues", statisticValue, oppositeChangeType));
// assert
Assert.False(propertyChangeTracker.HasChanged <Artist>(x => x.StatisticValues));
}
