public void CompareTwoDates_MethodCompareDateAndWriteDatesRange(string[] inputArray, string expected) { List <DateTime> dateTimes = new List <DateTime>(); //Arrange foreach (var date in inputArray) { dateTimes.Add(DateTime.ParseExact(date, "dd.MM.yyyy", CultureInfo.InvariantCulture, DateTimeStyles.AssumeLocal)); } //Act ILogicService logicService = new LogicService(); string actual = logicService.CompareTwoDates(dateTimes); //Assert Assert.Equal(expected, actual); }