public void SumTest_Group_4()
{
//arrange
var target = new CollectionSum();
var groupNum = 4;
var groupColumns = "Revenue";
var expected = "50,66,60";
//act
var actual = target.Sum(groupNum, groupColumns);
//assert
Assert.AreEqual(expected, actual);
}
public void SumTest_Group_3()
{
//arrange
var target = new CollectionSum();
var groupNum = 3;
var groupColumns = "Cost";
var expected = "6,15,24,21";
//act
var actual = target.Sum(groupNum, groupColumns);
//assert
Assert.AreEqual(expected, actual);
}