Initialize CBDD solution and add a .NET-focused gitignore for generated artifacts.

2026-02-20 12:54:07 -05:00
commit b8ed5ec500
214 changed files with 101452 additions and 0 deletions
--- a/tests/CBDD.Tests/ScanTests.cs
+++ b/tests/CBDD.Tests/ScanTests.cs
@@ -0,0 +1,113 @@
+using ZB.MOM.WW.CBDD.Core;
+using ZB.MOM.WW.CBDD.Core.Storage;
+using ZB.MOM.WW.CBDD.Core.Collections;
+using ZB.MOM.WW.CBDD.Core.Indexing;
+using ZB.MOM.WW.CBDD.Bson;
+using Xunit;
+using System;
+using System.IO;
+using System.Linq;
+using System.Collections.Generic;
+using ZB.MOM.WW.CBDD.Shared;
+
+namespace ZB.MOM.WW.CBDD.Tests
+{
+    public class ScanTests : IDisposable
+    {
+        private readonly string _testFile;
+        private readonly Shared.TestDbContext _db;
+
+        public ScanTests()
+        {
+            _testFile = Path.Combine(Path.GetTempPath(), $"scan_tests_{Guid.NewGuid()}.db");
+            if (File.Exists(_testFile)) File.Delete(_testFile);
+            var wal = Path.ChangeExtension(_testFile, ".wal");
+            if (File.Exists(wal)) File.Delete(wal);
+
+            _db = new Shared.TestDbContext(_testFile);
+        }
+
+        public void Dispose()
+        {
+            _db.Dispose();
+            if (File.Exists(_testFile)) File.Delete(_testFile);
+            var wal = Path.ChangeExtension(_testFile, ".wal");
+            if (File.Exists(wal)) File.Delete(wal);
+        }
+
+        [Fact]
+        public void Scan_FindsMatchingDocuments()
+        {
+            // Arrange
+            _db.Users.Insert(new User { Name = "Alice", Age = 30 });
+            _db.Users.Insert(new User { Name = "Bob", Age = 25 });
+            _db.Users.Insert(new User { Name = "Charlie", Age = 35 });
+            _db.SaveChanges();
+
+            // Act: Find users older than 28
+            var results = _db.Users.Scan(reader => ParseAge(reader) > 28).ToList();
+
+            // Assert
+            results.Count.ShouldBe(2);
+            results.ShouldContain(d => d.Name == "Alice");
+            results.ShouldContain(d => d.Name == "Charlie");
+        }
+
+        [Fact]
+        public void Repro_Insert_Loop_Hang()
+        {
+            // Reproduce hang reported by user at 501 documents
+            int count = 600;
+            for (int i = 0; i < count; i++)
+            {
+                _db.Users.Insert(new User { Name = $"User_{i}", Age = i });
+            }
+            _db.SaveChanges();
+        }
+
+        [Fact]
+        public void ParallelScan_FindsMatchingDocuments()
+        {
+            // Arrange
+            int count = 1000;
+            for (int i = 0; i < count; i++)
+            {
+                _db.Users.Insert(new User { Name = $"User_{i}", Age = i });
+            }
+            _db.SaveChanges();
+
+            // Act: Find users with Age >= 500
+            // Parallelism 2 to force partitioning
+            var results = _db.Users.ParallelScan(reader => ParseAge(reader) >= 500, degreeOfParallelism: 2).ToList();
+
+            // Assert
+            results.Count.ShouldBe(500);
+        }
+
+        private int ParseAge(BsonSpanReader reader)
+        {
+            try
+            {
+                reader.ReadDocumentSize();
+                while (reader.Remaining > 0)
+                {
+                    var type = reader.ReadBsonType();
+                    if (type == 0) break; // End of doc
+
+                    var name = reader.ReadElementHeader();
+
+                    if (name == "age")
+                    {
+                        return reader.ReadInt32();
+                    }
+                    else
+                    {
+                        reader.SkipValue(type);
+                    }
+                }
+            }
+            catch { return -1; }
+            return -1;
+        }
+    }
+}