chore: import upstream snapshot with attribution

dotnet/test/VectorData/InMemory.UnitTests/InMemoryServiceCollectionExtensionsTests.cs

@@ -0,0 +1,70 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using System;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.VectorData;
+using Microsoft.SemanticKernel;
+using Microsoft.SemanticKernel.Connectors.InMemory;
+using Xunit;
+
+namespace SemanticKernel.Connectors.InMemory.UnitTests;
+
+/// <summary>
+/// Contains tests for the <see cref="InMemoryServiceCollectionExtensions"/> class.
+/// </summary>
+public class InMemoryServiceCollectionExtensionsTests
+{
+    private readonly IServiceCollection _serviceCollection;
+
+    public InMemoryServiceCollectionExtensionsTests()
+    {
+        this._serviceCollection = new ServiceCollection();
+    }
+
+    [Fact]
+    public void AddVectorStoreRegistersClass()
+    {
+        // Act.
+        this._serviceCollection.AddInMemoryVectorStore();
+
+        // Assert.
+        var serviceProvider = this._serviceCollection.BuildServiceProvider();
+        var vectorStore = serviceProvider.GetRequiredService<VectorStore>();
+        Assert.NotNull(vectorStore);
+        Assert.IsType<InMemoryVectorStore>(vectorStore);
+    }
+
+    [Fact]
+    public void AddVectorStoreRecordCollectionRegistersClass()
+    {
+        // Act.
+        this._serviceCollection.AddInMemoryVectorStoreRecordCollection<string, TestRecord>("testcollection");
+
+        // Assert.
+        this.AssertVectorStoreRecordCollectionCreated();
+    }
+
+    private void AssertVectorStoreRecordCollectionCreated()
+    {
+        var serviceProvider = this._serviceCollection.BuildServiceProvider();
+
+        var collection = serviceProvider.GetRequiredService<VectorStoreCollection<string, TestRecord>>();
+        Assert.NotNull(collection);
+        Assert.IsType<InMemoryCollection<string, TestRecord>>(collection);
+
+        var vectorizedSearch = serviceProvider.GetRequiredService<IVectorSearchable<TestRecord>>();
+        Assert.NotNull(vectorizedSearch);
+        Assert.IsType<InMemoryCollection<string, TestRecord>>(vectorizedSearch);
+    }
+
+#pragma warning disable CA1812 // Avoid uninstantiated internal classes
+    private sealed class TestRecord
+#pragma warning restore CA1812 // Avoid uninstantiated internal classes
+    {
+        [VectorStoreKey]
+        public string Id { get; set; } = string.Empty;
+
+        [VectorStoreVector(4)]
+        public ReadOnlyMemory<float> Vector { get; set; }
+    }
+}