public void Batch_ReturnsGroupsOfN()
{
var numbers = Enumerable.Range(1, 100);
var groups = IEnumerableExtensions.Batch(numbers, 10);
Assert.IsTrue(groups.All(g => g.Count() == 10));
}
public void Batch_OnlyLastGroupHasLessItems()
{
var numbers = Enumerable.Range(1, 100);
var groups = IEnumerableExtensions.Batch(numbers, 13);
var lastGroup = groups.Last();
var restOfGroups = groups.Take(groups.Count() - 1);
Assert.IsTrue(restOfGroups.All(g => g.Count() == 13));
Assert.IsTrue(lastGroup.Count() == 9); //13*7 + 9 = 100
}
public void BatchReturnsProperBatches()
{
var expected = new[]
{
new[] { 1, 2 },
new[] { 3, 4 },
new[] { 5 }
};
var actual = IEnumerableExtensions.Batch(new[] { 1, 2, 3, 4, 5 }, 2);
Assert.IsNotNull(actual);
var actualArray = actual.Select(x => x.ToArray()).ToArray();
Assert.AreEqual(expected.Length, actualArray.Length);
for (int itemIndex = 0; itemIndex < actualArray.Length; itemIndex++)
{
CollectionAssert.AreEqual(expected[itemIndex], actualArray[itemIndex]);
}
}