public void AddInPlace_IfThisIsEmptyAndOtherIsEmpty_ThrowArgumentException() { var target = new double[0][]; var other = new double[0][]; Action action = () => target.AddInPlace(other); action.ShouldThrow <ArgumentException>() .WithMessage("*Argument 'target' cannot be empty.*") .Where(e => e.ParamName == "target"); }