public void Addition()
        {
            const int expectedReadoutsCount = 4;
            var       expectedReadouts      = new List <double> {
                3, 2.5, 8, -1
            };

            var result = _subject.Addition(_signal1, _signal2);

            Assert.That(result.Readouts, Is.Not.Null);
            Assert.That(result.Readouts.Count, Is.EqualTo(expectedReadoutsCount));
            Assert.That(result.Readouts, Is.EqualTo(expectedReadouts));
        }