public void TryGetReplacedValue_Extracts_The_Oldest_Value()
{
// arrange
var entity = TestHelper.CreateEntityWithId <Artist>(1);
var propertyChangeTracker = new PropertyChangeTracker(entity);
propertyChangeTracker.AddPropertyChangedItem <Artist>(x => x.Name, "T1", "T2");
propertyChangeTracker.AddPropertyChangedItem <Artist>(x => x.Name, "T2", "T3");
// act
string value;
propertyChangeTracker.TryGetReplacedValue <Artist, string>(x => x.Name, out value);
// assert
Assert.Equal("T1", value);
}
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 GetChangedProperties_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.GetChangedProperties();
// asset
Assert.Equal("Name", result.First());
}
public void Clear_Any_Changes_Are_Discarded()
{
// arrange
var entity = TestHelper.CreateEntityWithId <Artist>(1);
var propertyChangeTracker = new PropertyChangeTracker(entity);
propertyChangeTracker.AddPropertyChangedItem <Artist>(x => x.Name, "OldValue", "NewValue");
// act
propertyChangeTracker.Clear();
// asset
Assert.False(propertyChangeTracker.HasChanges);
}
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);
}
