public void LazyChildrenChildrenAccessThrowErrorIfNoParentAttached(IList <IMetadataObject> values)
{
// Act
var sut = new LazyChildren <IMetadataObject>(values.ToImmutableList());
// Assert
Assert.Throws <NotSupportedException>(() => sut.GetEnumerator());
}
public void LazyChildrenThrowsErrorIfLambdaReturnsNull(IMetadataObject parent)
{
// Act
var sut = new LazyChildren <IMetadataObject>(_ => null);
sut.AttachToParent(parent);
// Assert
Assert.Throws <NotSupportedException>(() => sut.GetEnumerator());
}