chore: import upstream snapshot with attribution

2026-07-13 13:21:23 +08:00
commit b957a53def
5423 changed files with 863745 additions and 0 deletions
@@ -0,0 +1,28 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using Microsoft.Extensions.VectorData;
+using PgVector.ConformanceTests.Support;
+using VectorData.ConformanceTests;
+using VectorData.ConformanceTests.Support;
+using Xunit;
+
+namespace PgVector.ConformanceTests;
+
+public class PostgresDistanceFunctionTests(PostgresDistanceFunctionTests.Fixture fixture)
+    : DistanceFunctionTests<int>(fixture), IClassFixture<PostgresDistanceFunctionTests.Fixture>
+{
+    public override Task EuclideanSquaredDistance() => Assert.ThrowsAsync<NotSupportedException>(base.EuclideanSquaredDistance);
+    public override Task NegativeDotProductSimilarity() => Assert.ThrowsAsync<NotSupportedException>(base.NegativeDotProductSimilarity);
+
+    public override async Task HammingDistance()
+    {
+        // Hamming distance is supported by pgvector, but only on binary vectors (bit(x)), and the test uses float32 vectors (vector(x)).
+        var exception = await Assert.ThrowsAsync<VectorStoreException>(base.HammingDistance);
+        Assert.IsType<Npgsql.PostgresException>(exception.InnerException);
+    }
+
+    public new class Fixture() : DistanceFunctionTests<int>.Fixture
+    {
+        public override TestStore TestStore => PostgresTestStore.Instance;
+    }
+}