public void GetEnumerator_CollectionWithGroups_ReturnsCorrectResults()
{
var collection = new[]
{
1, 2, 3, 4, 5,
7,
10, 11,
13,
15,
17, 18, 19
};
var output = CollectionExtensions.AggregateIf(collection,
(prev, current) => current == prev + 1,
() => string.Empty,
(aggregator, element) => (aggregator + ", " + element).TrimStart(',', ' '),
aggregator => aggregator).ToList();
CollectionAssert.AreEqual(new[]
{
"1, 2, 3, 4, 5",
"7",
"10, 11",
"13",
"15",
"17, 18, 19"
}, output);
}
public void Constructor_NullResultSelector_ThrowsArgumentNullException()
{
IEnumerable <int> collection = new int[0];
Func <int, int, bool> aggregatePredicate = (i1, i2) => true;
Func <int> getSeed = () => 0;
Func <int, int, int> aggregateFunc = (i1, i2) => i1 + i2;
Func <int, int> resultSelector = null;
Assert.Throws <ArgumentNullException>(() => CollectionExtensions.AggregateIf(collection, aggregatePredicate, getSeed, aggregateFunc, resultSelector));
}
