public static void GroupIntoPeriods_ForEmptyInput_ReturnsEmptyOuput()
{
var expenses = new List <Expense>();
var periods = PeriodSplitter.GroupIntoPeriods(expenses, 18);
Assert.AreEqual(0, periods.Count());
}
public static void GroupIntoPeriods_OneExpense_ReturnsInOnePeriod()
{
var expenses = new List <Expense>
{
new Expense(1, ExpenseType.CellPhoneCall, DateTime.Now)
};
var periods = PeriodSplitter.GroupIntoPeriods(expenses, 18);
Assert.AreEqual(1, periods.Count());
Assert.AreSame(expenses.First(), periods.First().Expenses.First());
}
public static void GroupIntoPeriods_TwoExprensesFromOnePeriod_ReturnsInOnePeriodWith2Expenses()
{
var expenses = new List <Expense>
{
new Expense(1, ExpenseType.CellPhoneCall, new DateTime(2018, 10, 10)),
new Expense(1, ExpenseType.CellPhoneCall, new DateTime(2018, 10, 11))
};
var periods = PeriodSplitter.GroupIntoPeriods(expenses, 18);
Assert.AreEqual(1, periods.Count());
Assert.AreSame(expenses.First(), periods.First().Expenses.First());
}
public static void GroupIntoPeriods_TwoExprensesAreFromTwoPeriods_Returns2PeriodsWith1ExpensePerPeriod()
{
var expenses = new List <Expense>
{
new Expense(1, ExpenseType.CellPhoneCall, DateTime.Now),
new Expense(1, ExpenseType.CellPhoneCall, DateTime.Now.AddDays(35))
};
var periods = PeriodSplitter.GroupIntoPeriods(expenses, 18);
Assert.AreEqual(2, periods.Count());
Assert.AreSame(expenses.First(), periods.First().Expenses.First());
Assert.AreSame(expenses.Last(), periods.Last().Expenses.First());
}
public static void GroupIntoPeriods_MultipleExpensesFromTwoPeriods_Returns2PeriodsWithCorrectlyAssignedExpenses()
{
var period1expense1 = new Expense(1, ExpenseType.CellPhoneCall, new DateTime(2018, 10, 10));
var period1expense2 = new Expense(1, ExpenseType.CellPhoneCall, new DateTime(2018, 10, 11));
var period2expense1 = new Expense(1, ExpenseType.CellPhoneCall, new DateTime(2018, 10, 19));
var expenses = new List <Expense>
{
period1expense1,
period1expense2,
period2expense1,
};
var periods = PeriodSplitter.GroupIntoPeriods(expenses, 18);
Assert.AreEqual(2, periods.Count());
Assert.AreEqual(2, periods.First().Expenses.Count());
Assert.AreEqual(1, periods.Last().Expenses.Count());
Assert.AreSame(period1expense1, periods.First().Expenses.First());
Assert.AreSame(period1expense2, periods.First().Expenses.Last());
Assert.AreSame(period2expense1, periods.Last().Expenses.First());
}