test(backend): add matchmaking relevance and ranking tests

2026-10-04 02:44:03 +02:00
parent 25ce901021
commit 182c26d9f8
5 changed files with 172 additions and 2 deletions
@@ -0,0 +1,70 @@
+using TarninaHub.Application.Matchmaking;
+
+namespace TarninaHub.Tests.Matchmaking;
+
+public class EmbeddingAndRankingTests
+{
+    private static double Magnitude(float[] vector) =>
+        Math.Sqrt(vector.Sum(value => (double)value * value));
+
+    [Fact]
+    public void HashingEmbeddingProvider_ProducesNormalizedVectorOfConfiguredDimension()
+    {
+        var provider = new HashingEmbeddingProvider();
+
+        var vector = provider.Embed("klub sąsiedzki dla seniorów");
+
+        Assert.Equal(EmbeddingConstants.Dimension, vector.Length);
+        Assert.Equal(1.0, Magnitude(vector), precision: 5);
+    }
+
+    [Fact]
+    public void HashingEmbeddingProvider_IsDeterministic()
+    {
+        var provider = new HashingEmbeddingProvider();
+
+        var first = provider.Embed("praca wspierana niepełnosprawność");
+        var second = provider.Embed("praca wspierana niepełnosprawność");
+
+        Assert.Equal(first, second);
+    }
+
+    [Fact]
+    public void CosineSimilarity_IsHigherForSharedVocabulary()
+    {
+        var provider = new HashingEmbeddingProvider();
+
+        var query = provider.Embed("seniorzy spotkania samotność");
+        var related = provider.Embed("klub sąsiedzki seniorzy spotkania samotność");
+        var unrelated = provider.Embed("hostel młodzież bezdomność");
+
+        var relatedScore = VectorMath.CosineSimilarity(query, related);
+        var unrelatedScore = VectorMath.CosineSimilarity(query, unrelated);
+
+        Assert.True(relatedScore > unrelatedScore);
+    }
+
+    [Fact]
+    public void SemanticRanker_OrdersByScoreAndRespectsTopK()
+    {
+        var provider = new HashingEmbeddingProvider();
+        var query = provider.Embed("cyfryzacja seniorzy internet");
+        var candidates = new (string Id, IReadOnlyList<float> Vector)[]
+        {
+            ("cyfryzacja", provider.Embed("cyfryzacja seniorzy internet szkolenie")),
+            ("praca", provider.Embed("praca wspierana doradca")),
+            ("hostel", provider.Embed("hostel młodzież bezdomność")),
+        };
+
+        var ranked = SemanticRanker.Rank(query, candidates, topK: 2);
+
+        Assert.Equal(2, ranked.Count);
+        Assert.Equal("cyfryzacja", ranked[0].Item);
+    }
+
+    [Fact]
+    public void CosineSimilarity_ReturnsZeroForMismatchedDimensions()
+    {
+        Assert.Equal(0, VectorMath.CosineSimilarity([1f, 0f], [1f]));
+    }
+}