public void AggregateAmountData_OverallMaximumAmount_Calculates()
{
// Arrange
TransactionGrouper grouper = TransactionGrouper.Overall;
TransactionAggregator aggregator = TransactionAggregator.MaximumAmount;
TransactionData[] transactions =
{
new TransactionData()
{
Amount = 1
},
new TransactionData()
{
Amount = 2
},
new TransactionData()
{
Amount = 3
},
new TransactionData()
{
Amount = 4
},
new TransactionData()
{
Amount = 5
},
new TransactionData()
{
Amount = 6
},
new TransactionData()
{
Amount = 7
},
new TransactionData()
{
Amount = 8
},
new TransactionData()
{
Amount = 9
}
};
IEnumerable <TransactionData> expectedData = new TransactionData[]
{
new TransactionData()
{
Amount = 9
}
};
// Act
IEnumerable <TransactionData> actualData = Program.AggregateAmountData(transactions, grouper, aggregator);
// Assert
Assert.AreEqual(expectedData, actualData);
}
public static void OutputTransactionStats(TransactionGrouper grouper, TransactionAggregator aggregator)
{
IEnumerable <TransactionData> amountStats = AggregateAmountData(Transactions, grouper, aggregator);
foreach (TransactionData stats in amountStats)
{
Console.WriteLine($"- {grouper} {aggregator} {stats}");
}
}
public static IEnumerable <TransactionData> AggregateAmountData(IEnumerable <TransactionData> transactionData,
TransactionGrouper grouper, TransactionAggregator aggregator)
{
return(transactionData
.GroupBy(grouper.KeyFunction, aggregator.AggregateFunction));
}
public void AggregateAmountData_YearlyTotalAmount_Calculates()
{
// Arrange
TransactionGrouper grouper = TransactionGrouper.Yearly;
TransactionAggregator aggregator = TransactionAggregator.TotalAmount;
TransactionData[] transactions =
{
new TransactionData()
{
Year = 2000, Amount = 1
},
new TransactionData()
{
Year = 2000, Amount = 2
},
new TransactionData()
{
Year = 2000, Amount = 3
},
new TransactionData()
{
Year = 2001, Amount = 4
},
new TransactionData()
{
Year = 2001, Amount = 5
},
new TransactionData()
{
Year = 2001, Amount = 6
},
new TransactionData()
{
Year = 2002, Amount = 7
},
new TransactionData()
{
Year = 2002, Amount = 8
},
new TransactionData()
{
Year = 2002, Amount = 9
}
};
IEnumerable <TransactionData> expectedData = new TransactionData[]
{
new TransactionData()
{
Year = 2000, Amount = 6
},
new TransactionData()
{
Year = 2001, Amount = 15
},
new TransactionData()
{
Year = 2002, Amount = 24
}
};
// Act
IEnumerable <TransactionData> actualData = Program.AggregateAmountData(transactions, grouper, aggregator);
// Assert
Assert.AreEqual(expectedData, actualData);
}