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

tests/CBDD.Tests/SchemaTests.cs

@@ -0,0 +1,57 @@
+using ZB.MOM.WW.CBDD.Bson;
+using ZB.MOM.WW.CBDD.Core.Collections;
+using ZB.MOM.WW.CBDD.Core.Indexing;
+using ZB.MOM.WW.CBDD.Shared.TestDbContext_TestDbContext_Mappers;
+using System.Text;
+using Xunit;
+
+namespace ZB.MOM.WW.CBDD.Tests;
+
+public class SchemaTests
+{
+    private static readonly System.Collections.Concurrent.ConcurrentDictionary<string, ushort> _testKeyMap = new(StringComparer.OrdinalIgnoreCase);
+    static SchemaTests()
+    {
+        ushort id = 1;
+        foreach (var k in new[] { "_id", "name", "mainaddress", "otheraddresses", "tags", "secret", "street", "city" }) _testKeyMap[k] = id++;
+    }
+
+    [Fact]
+    public void UsedKeys_ShouldReturnAllKeys()
+    {
+        var mapper = new ZB_MOM_WW_CBDD_Shared_ComplexUserMapper();
+        var keys = mapper.UsedKeys.ToList();
+
+        keys.ShouldContain("_id");
+        keys.ShouldContain("name");
+        keys.ShouldContain("mainaddress");
+        keys.ShouldContain("otheraddresses");
+        keys.ShouldContain("tags");
+        keys.ShouldContain("secret");
+        keys.ShouldContain("street");
+        keys.ShouldContain("city");
+
+    }
+
+    [Fact]
+    public void GetSchema_ShouldReturnBsonSchema()
+    {
+        var mapper = new ZB_MOM_WW_CBDD_Shared_ComplexUserMapper();
+        var schema = mapper.GetSchema();
+
+        var idField = schema.Fields.FirstOrDefault(f => f.Name == "_id");
+        idField.ShouldNotBeNull();
+        idField.Type.ShouldBe(BsonType.ObjectId);
+
+        var nameField = schema.Fields.FirstOrDefault(f => f.Name == "name");
+        nameField.ShouldNotBeNull();
+        nameField.Type.ShouldBe(BsonType.String);
+
+        var addressField = schema.Fields.FirstOrDefault(f => f.Name == "mainaddress");
+        addressField.ShouldNotBeNull();
+        addressField.Type.ShouldBe(BsonType.Document);
+        addressField.NestedSchema.ShouldNotBeNull();
+        // Address in MockEntities has City (Nested)
+        addressField.NestedSchema.Fields.ShouldContain(f => f.Name == "city");
+    }
+}