133 lines
2.7 KiB
C#
133 lines
2.7 KiB
C#
using FluentAssertions;
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using Recyclable.Collections;
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using System.Numerics;
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namespace Recyclable.CollectionsTests
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{
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public class ItemRangesIteratorTests
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{
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[Theory]
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[MemberData(nameof(TestCases))]
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public void IterateShouldYieldAllItems(int startingBlockIndex, int blockSize, long itemsCount, int step, IEnumerable<(int BlockIndex, int StartingItemIndex, long ItemsCount)> expected)
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{
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// Prepare
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byte blockSizePow2BitShift = (byte)(31 - BitOperations.LeadingZeroCount((uint)blockSize));
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var actual = new List<(int BlockIndex, int StartingItemIndex, long ItemsCount)>();
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// Act
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ItemRangesIterator.Iterate(startingBlockIndex, blockSize, blockSizePow2BitShift, itemsCount, step, (searchInfo) =>
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{
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actual.Add((searchInfo.BlockIndex, searchInfo.StartingItemIndex, searchInfo.ItemsToSearchCount));
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return true;
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});
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// Validate
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_ = actual.Should().HaveCount(expected.Count()).And.ContainInConsecutiveOrder(expected);
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}
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public static IEnumerable<object[]> TestCases => new[]
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{
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new object[]
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{
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0, 128, 333, (long)(333 * 0.329), new(int BlockIndex, int StartingItemIndex, long ItemsCount)[]
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{
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(0, 0, 109),
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(0, 109, 109),
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(1, 90, 109),
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(2, 71, 6)
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}
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},
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new object[]
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{
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0, 2, 10, 2, new (int BlockIndex, int StartingItemIndex, long ItemsCount)[]
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{
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(0, 0, 2),
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(1, 0, 2),
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(2, 0, 2),
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(3, 0, 2),
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(4, 0, 2),
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}
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},
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new object[]
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{
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0, 2, 10, 3, new (int BlockIndex, int StartingItemIndex, long ItemsCount)[]
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{
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(0, 0, 3),
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(1, 1, 3),
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(3, 0, 3),
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(4, 1, 1),
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}
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},
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new object[]
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{
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0, 1, 10, 3, new (int BlockIndex, int StartingItemIndex, long ItemsCount)[]
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{
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(0, 0, 3),
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(3, 0, 3),
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(6, 0, 3),
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(9, 0, 1),
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}
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},
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new object[]
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{
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0, 2, 10, 4, new (int BlockIndex, int StartingItemIndex, long ItemsCount)[]
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{
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(0, 0, 4),
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(2, 0, 4),
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(4, 0, 2),
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}
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},
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new object[]
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{
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0, 1, 10, 2, new (int BlockIndex, int StartingItemIndex, long ItemsCount)[]
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{
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(0, 0, 2),
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(2, 0, 2),
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(4, 0, 2),
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(6, 0, 2),
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(8, 0, 2),
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}
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},
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new object[]
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{
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0, 2, 10, 1, new (int BlockIndex, int StartingItemIndex, long ItemsCount)[]
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{
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(0, 0, 1),
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(0, 1, 1),
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(1, 0, 1),
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(1, 1, 1),
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(2, 0, 1),
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(2, 1, 1),
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(3, 0, 1),
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(3, 1, 1),
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(4, 0, 1),
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(4, 1, 1),
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}
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},
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new object[]
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{
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0, 1, 10, 1, new (int BlockIndex, int StartingItemIndex, long ItemsCount)[]
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{
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(0, 0, 1),
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(1, 0, 1),
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(2, 0, 1),
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(3, 0, 1),
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(4, 0, 1),
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(5, 0, 1),
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(6, 0, 1),
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(7, 0, 1),
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(8, 0, 1),
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(9, 0, 1),
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}
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},
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};
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}
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}
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