public void MonthlySummaryStaticAmounts(int[] years, int[] months)
{
const int totalMonths = 6;
Assert.Equal(totalMonths, years.Length);
Assert.Equal(totalMonths, months.Length);
// Arrange: Fixed amounts.
long[][] allAmounts = new long[][]
{
new long[] { 1000, 100, -200, -100 },
new long[] { 2000, 200, -300, -150 },
new long[] { 3000, 300, -400, -200 },
new long[] { 0, -100, -220 },
new long[] { 1000, 200 },
new long[] { 0, 0, 0, 0 }
};
long[] ExpectedIncomePerMonth = new long[]
{
1100, 2200, 3300, 0, 1200, 0
};
long[] ExpectedExpensesPerMonth = new long[]
{
-300, -450, -600, -320, 0, 0
};
// Create the transaction with the fixed amounts.
IEnumerable <Transaction> allTransactions = new List <Transaction>();
for (int i = 0; i < totalMonths; i++)
{
long[] amounts = allAmounts[i];
IEnumerable <Transaction> transactions = CreateTransactionsInMonth(amounts, years[i], months[i]);
allTransactions = allTransactions.Concat(transactions);
}
// Randomize the order of the transactions in the list.
Random random = new Random();
allTransactions = allTransactions.OrderBy(x => random.Next()).ToList();
// Act
SummaryByTimeCategorizer categorizer = new SummaryByTimeCategorizer();
var summaryBuckets = categorizer.CategorizeByYearAndMonth(allTransactions as IList <Transaction>);
IList <YearMonthKey> monthKeys = new List <YearMonthKey>();
for (int i = 0; i < totalMonths; i++)
{
YearMonthKey monthKey = new YearMonthKey(years[i], months[i]);
monthKeys.Add(monthKey);
// Verify the summary contains the month.
Assert.True(summaryBuckets.ContainsKey(monthKey), monthKey.ToString());
var monthSummary = summaryBuckets[monthKey];
// Verify the summary contains the expected amount for the month.
Assert.Equal(ExpectedIncomePerMonth[i], monthSummary.Income);
Assert.Equal(ExpectedExpensesPerMonth[i], monthSummary.Expenses);
}
// Verify the summary doesn't contain another month that was not in the list.
foreach (var monthKey in summaryBuckets.Keys)
{
Assert.True(monthKeys.Contains(monthKey), monthKey.ToString());
}
}
