chore: import upstream snapshot with attribution

dotnet/test/VectorData/Redis.ConformanceTests/RedisHashSetDistanceFunctionTests.cs

@@ -0,0 +1,33 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using Redis.ConformanceTests.Support;
+using VectorData.ConformanceTests;
+using VectorData.ConformanceTests.Support;
+using Xunit;
+using Xunit.Sdk;
+
+namespace Redis.ConformanceTests;
+
+public class RedisHashSetDistanceFunctionTests(RedisHashSetDistanceFunctionTests.Fixture fixture)
+    : DistanceFunctionTests<string>(fixture), IClassFixture<RedisHashSetDistanceFunctionTests.Fixture>
+{
+    // Excluding DotProductSimilarity from the test even though Redis supports it, because the values that redis returns
+    // are neither DotProductSimilarity nor NegativeDotProduct, but rather 1 - DotProductSimilarity.
+    public override Task DotProductSimilarity() => Assert.ThrowsAsync<EqualException>(base.DotProductSimilarity);
+
+    public override Task EuclideanDistance() => Assert.ThrowsAsync<NotSupportedException>(base.EuclideanDistance);
+    public override Task NegativeDotProductSimilarity() => Assert.ThrowsAsync<NotSupportedException>(base.NegativeDotProductSimilarity);
+    public override Task HammingDistance() => Assert.ThrowsAsync<NotSupportedException>(base.HammingDistance);
+    public override Task ManhattanDistance() => Assert.ThrowsAsync<NotSupportedException>(base.ManhattanDistance);
+
+    public new class Fixture() : DistanceFunctionTests<string>.Fixture
+    {
+        private int _collectionCounter;
+
+        public override TestStore TestStore => RedisTestStore.HashSetInstance;
+
+        // Redis doesn't seem to reliably delete the collection: when running multiple tests that delete and recreate the collection with different key types,
+        // we seem to get key values from the previous collection despite having deleted and recreated it. So we uniquify the collection name instead.
+        public override string CollectionName => "DistanceFunctionTests" + (++this._collectionCounter);
+    }
+}