public void ChangeName_ShouldHaveOtherValuesSame()
{
var orig = new TodoItem(name, desc);
var changedName = orig.ChangeName(newName);
var changedDesc = changedName.ChangeDescription(newDesc);
Assert.Equal(newName, changedName.Name);
Assert.Equal(newDesc, changedDesc.Description);
Assert.Equal(orig.CreatedDate, changedName.CreatedDate);
}