chore: import upstream snapshot with attribution

dotnet/test/VectorData/CosmosMongoDB.ConformanceTests/Support/CosmosConnectionStringRequiredAttribute.cs

@@ -0,0 +1,19 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using VectorData.ConformanceTests.Xunit;
+
+namespace CosmosMongoDB.ConformanceTests.Support;
+
+/// <summary>
+/// Checks whether the sqlite_vec extension is properly installed, and skips the test(s) otherwise.
+/// </summary>
+[AttributeUsage(AttributeTargets.Method | AttributeTargets.Class | AttributeTargets.Assembly)]
+public sealed class CosmosConnectionStringRequiredAttribute : Attribute, ITestCondition
+{
+    public ValueTask<bool> IsMetAsync() => new(CosmosMongoTestEnvironment.IsConnectionStringDefined);
+
+    public string Skip { get; set; } = "The Cosmos connection string hasn't been configured (CosmosMongo:ConnectionString).";
+
+    public string SkipReason
+        => this.Skip;
+}

dotnet/test/VectorData/CosmosMongoDB.ConformanceTests/Support/CosmosMongoFixture.cs

@@ -0,0 +1,10 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using VectorData.ConformanceTests.Support;
+
+namespace CosmosMongoDB.ConformanceTests.Support;
+
+public class CosmosMongoFixture : VectorStoreFixture
+{
+    public override TestStore TestStore => CosmosMongoTestStore.Instance;
+}

dotnet/test/VectorData/CosmosMongoDB.ConformanceTests/Support/CosmosMongoTestEnvironment.cs

@@ -0,0 +1,26 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using Microsoft.Extensions.Configuration;
+
+namespace CosmosMongoDB.ConformanceTests.Support;
+
+#pragma warning disable CA1810 // Initialize all static fields when those fields are declared
+
+public static class CosmosMongoTestEnvironment
+{
+    public static readonly string? ConnectionString;
+
+    public static bool IsConnectionStringDefined => ConnectionString is not null;
+
+    static CosmosMongoTestEnvironment()
+    {
+        var configuration = new ConfigurationBuilder()
+            .AddJsonFile(path: "testsettings.json", optional: true)
+            .AddJsonFile(path: "testsettings.development.json", optional: true)
+            .AddEnvironmentVariables()
+            .AddUserSecrets<CosmosConnectionStringRequiredAttribute>()
+            .Build();
+
+        ConnectionString = configuration["CosmosMongo:ConnectionString"];
+    }
+}

dotnet/test/VectorData/CosmosMongoDB.ConformanceTests/Support/CosmosMongoTestStore.cs

@@ -0,0 +1,45 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using Microsoft.SemanticKernel.Connectors.CosmosMongoDB;
+using MongoDB.Driver;
+using VectorData.ConformanceTests.Support;
+
+namespace CosmosMongoDB.ConformanceTests.Support;
+
+#pragma warning disable CA1001
+public sealed class CosmosMongoTestStore : TestStore
+#pragma warning restore CA1001
+{
+    public static CosmosMongoTestStore Instance { get; } = new();
+
+    private MongoClient? _client;
+    private IMongoDatabase? _database;
+
+    public MongoClient Client => this._client ?? throw new InvalidOperationException("Not initialized");
+    public IMongoDatabase Database => this._database ?? throw new InvalidOperationException("Not initialized");
+
+    public override string DefaultIndexKind => Microsoft.Extensions.VectorData.IndexKind.IvfFlat;
+
+    public override string DefaultDistanceFunction => Microsoft.Extensions.VectorData.DistanceFunction.CosineDistance;
+
+    public CosmosMongoVectorStore GetVectorStore(CosmosMongoVectorStoreOptions options)
+        => new(this.Database, options);
+
+    private CosmosMongoTestStore()
+    {
+    }
+
+    protected override Task StartAsync()
+    {
+        if (string.IsNullOrWhiteSpace(CosmosMongoTestEnvironment.ConnectionString))
+        {
+            throw new InvalidOperationException("Connection string is not configured, set the CosmosMongo:ConnectionString environment variable");
+        }
+
+        this._client = new MongoClient(CosmosMongoTestEnvironment.ConnectionString);
+        this._database = this._client.GetDatabase("VectorSearchTests");
+        this.DefaultVectorStore = new CosmosMongoVectorStore(this._database);
+
+        return Task.CompletedTask;
+    }
+}