public void HaveBudget_20180201_20180415()
{
var range = new InputRange("2018-02-01", "2018-04-15");
_repository.GetBudgets().Returns(new List <Budget>
{
new Budget
{
YearMonth = "201802",
Amount = 28
},
new Budget
{
YearMonth = "201803",
Amount = 3100
}, new Budget
{
YearMonth = "201804",
Amount = 30000
}
});
var actual = _calculator.GetValidBudgetBy(range);
Assert.AreEqual(18128, actual);
}
public void InvalidRange()
{
var range = new InputRange("2018-02-15", "2018-2-10");
_repository.GetBudgets().Returns(new List <Budget>
{
new Budget
{
YearMonth = "201802",
Amount = 28
},
});
var actual = _calculator.GetValidBudgetBy(range);
}
public void HaveBudget()
{
var range = new InputRange("2018-01-01", "2018-01-31");
_repository.GetBudgets().Returns(new List <Budget>
{
new Budget
{
YearMonth = "201801",
Amount = 31000
}
});
var actual = _calculator.GetValidBudgetBy(range);
Assert.AreEqual(31000, actual);
}
public void HaveBudget_20180210_20180215()
{
var range = new InputRange("2018-02-10", "2018-2-15");
_repository.GetBudgets().Returns(new List <Budget>
{
new Budget
{
YearMonth = "201802",
Amount = 28
},
});
var actual = _calculator.GetValidBudgetBy(range);
Assert.AreEqual(6, actual);
}
public decimal GetValidBudgetBy(InputRange inputRange)
{
if (!inputRange.IsValid())
{
throw new ArgumentException("Not a valid From/To date time");
}
var budget = _repo.GetBudgets();
var months = inputRange.GetRangeMonths();
var result = 0;
foreach (var month in months)
{
var totaldays = DateTime.DaysInMonth(month.Value.Year, month.Value.Month);
var totalBudget = budget.Where(x => x.YearMonth == month.Key).Select(d => d.Amount).FirstOrDefault();
if (string.Compare(month.Key, inputRange.From.ToString("yyyyMM")) == 0)
{
if (months.Count == 1)
{
result = (inputRange.GetDayofTo() - inputRange.GetDayofFrom() + 1) * totalBudget / totaldays;
}
else
{
result += (totaldays - inputRange.GetDayofFrom() + 1) * totalBudget / totaldays;
}
continue;
}
if (string.Compare(month.Key, inputRange.To.ToString("yyyyMM")) == 0)
{
result += totalBudget / totaldays * inputRange.GetDayofTo();
continue;
}
result += budget.Where(x => x.YearMonth == month.Key).Select(d => d.Amount).FirstOrDefault();
}
return(result);
}