public void WhenMultipleCalculationsWithResultAreCompleted_GetAllPastResults()
        {
            _calculatorRepository.AddCalculation(1);
            _calculatorRepository.AddCalculation(2);
            _calculatorRepository.AddCalculation(3);
            var expectedResults = new List <int>()
            {
                1, 2, 3
            };

            Assert.AreEqual(expectedResults, _calculatorRepository.GetAllResults());
        }