public void Saves_A_Round()
        {
            // Arrange
            var sut = new NumberGame();

            Die[] expectedInput = null;
            // Act
            var expectedValue = sut.Round(expectedInput);
            var actual        = sut.Rounds.ElementAt(0);

            // Assert
            Assert.Equal(expectedValue, actual.Item1);
            Assert.Equal(expectedInput, actual.Item2);
        }