51 lines
2.0 KiB
C#
51 lines
2.0 KiB
C#
using ZB.MOM.WW.CBDD.Core.Indexing;
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using ZB.MOM.WW.CBDD.Core.Storage;
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namespace ZB.MOM.WW.CBDD.Tests;
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public class BTreeDeleteUnderflowTests
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{
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/// <summary>
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/// Executes Delete_HeavyWorkload_Should_Remain_Queryable_After_Merges.
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/// </summary>
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[Fact]
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public void Delete_HeavyWorkload_Should_Remain_Queryable_After_Merges()
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{
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string dbPath = Path.Combine(Path.GetTempPath(), $"btree_underflow_{Guid.NewGuid():N}.db");
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try
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{
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using var storage = new StorageEngine(dbPath, PageFileConfig.Default);
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var index = new BTreeIndex(storage, IndexOptions.CreateBTree("k"));
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ulong insertTxn = storage.BeginTransaction().TransactionId;
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for (var i = 1; i <= 240; i++)
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index.Insert(IndexKey.Create(i), new DocumentLocation((uint)(1000 + i), 0), insertTxn);
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storage.CommitTransaction(insertTxn);
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ulong deleteTxn = storage.BeginTransaction().TransactionId;
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for (var i = 1; i <= 190; i++)
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index.Delete(IndexKey.Create(i), new DocumentLocation((uint)(1000 + i), 0), deleteTxn).ShouldBeTrue();
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storage.CommitTransaction(deleteTxn);
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for (var i = 1; i <= 190; i++) index.TryFind(IndexKey.Create(i), out _, 0).ShouldBeFalse();
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for (var i = 191; i <= 240; i++)
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{
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index.TryFind(IndexKey.Create(i), out var location, 0).ShouldBeTrue();
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location.PageId.ShouldBe((uint)(1000 + i));
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}
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var remaining = index.GreaterThan(IndexKey.Create(190), false, 0).ToList();
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remaining.Count.ShouldBe(50);
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remaining.First().Key.ShouldBe(IndexKey.Create(191));
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remaining.Last().Key.ShouldBe(IndexKey.Create(240));
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}
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finally
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{
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if (File.Exists(dbPath)) File.Delete(dbPath);
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string walPath = Path.ChangeExtension(dbPath, ".wal");
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if (File.Exists(walPath)) File.Delete(walPath);
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}
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}
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} |