public void TestRollingIndexSkip()
{
const int size = 10;
const int testSize = 25;
var rollingIndex = new RollingIndex <string>(size);
var items = new List <string>();
int i;
for (i = 0; i < testSize; i++)
{
var item = $"item {i}";
rollingIndex.Add(item, i);
items.Add(item);
}
var(_, err) = rollingIndex.Get(0);
Assert.Equal(StoreErrorType.TooLate, err.StoreErrorType);
// 1
var skipIndex1 = 9;
var expected1 = items.Skip(skipIndex1 + 1).ToArray();
var(cached1, err1) = rollingIndex.Get(skipIndex1);
Assert.Null(err1);
var convertedItems = new List <string>();
foreach (var it in cached1)
{
convertedItems.Add(it);
}
convertedItems.ToArray().ShouldCompareTo(expected1);
// 2
var skipIndex2 = 15;
var expected2 = items.Skip(skipIndex2 + 1).ToArray();
var(cached2, err2) = rollingIndex.Get(skipIndex2);
Assert.Null(err2);
convertedItems = new List <string>();
foreach (var it in cached2)
{
convertedItems.Add(it);
}
convertedItems.ToArray().ShouldCompareTo(expected2);
// 3
var skipIndex3 = 27;
string[] expected3 = { };
var(cached3, err3) = rollingIndex.Get(skipIndex3);
Assert.Null(err3);
convertedItems = new List <string>();
foreach (var it in cached3)
{
convertedItems.Add(it);
}
convertedItems.ToArray().ShouldCompareTo(expected3);
}