public void Returns_single_positive_frequency_change(
                ChronalCalibrator calibrator,
                int change)
            {
                var result = calibrator.Calibrate($"+{change}");

                result.Should().Be(change);
            }
            public void Returns_single_negative_frequency_change(
                ChronalCalibrator calibrator,
                int change)
            {
                var frequencyChange = -change;

                var result = calibrator.Calibrate($"{frequencyChange}");

                result.Should().Be(frequencyChange);
            }
            public void Returns_sum_of_many_frequency_changes(
                ChronalCalibrator calibrator,
                bool[] signs,
                int[] changes)
            {
                var frequencyChangesAsString = ToFrequencyChanges(signs, changes);
                var expected = signs
                               .Zip(changes, (s, n) => (s ? 1 : -1) * n)
                               .Sum();

                var result = calibrator.Calibrate(frequencyChangesAsString);

                result.Should().Be(expected);
            }
            public void Solves_day_1_problem_1(ChronalCalibrator calibrator)
            {
                var myPuzzleInput = File.ReadAllText("Day01/problem1.txt");

                calibrator.Calibrate(myPuzzleInput).Should().Be(587);
            }
            public void Returns_zero_for_no_input(ChronalCalibrator calibrator)
            {
                var result = calibrator.Calibrate(string.Empty);

                result.Should().Be(0);
            }