public virtual void Update()
{
Translation translation = movement.Translation();
Translate(translation);
merging.Merge(this, translation);
}
[Test] public void ShouldPerformAMergeWhenUpdating()
{
BlockGroup group = CreateBlockGroup();
Translation translation = new Translation(1, 1);
When.Called(() => movement.Translation()).Then.Return(translation);
group.Update();
Verify.That(() => merging.Merge(group, translation)).IsCalled();
}