Added a test for the LLamaEmbedder

LLama.Unittest/LLamaEmbedderTests.cs

@@ -0,0 +1,45 @@
+using LLama.Common;
+
+namespace LLama.Unittest;
+
+public class LLamaEmbedderTests
+    : IDisposable
+{
+    private readonly LLamaEmbedder _embedder = new(new ModelParams("Models/llama-2-7b-chat.ggmlv3.q3_K_S.bin"));
+
+    public void Dispose()
+    {
+        _embedder.Dispose();
+    }
+
+    private static float Dot(float[] a, float[] b)
+    {
+        Assert.Equal(a.Length, b.Length);
+        return a.Zip(b, (x, y) => x + y).Sum();
+    }
+
+    [Fact]
+    public void EmbedHello()
+    {
+        var hello = _embedder.GetEmbeddings("Hello");
+
+        Assert.NotNull(hello);
+        Assert.NotEmpty(hello);
+        //Assert.Equal(_embedder.EmbeddingSize, hello.Length);
+    }
+
+    [Fact]
+    public void EmbedCompare()
+    {
+        var cat = _embedder.GetEmbeddings("cat");
+        var kitten = _embedder.GetEmbeddings("kitten");
+        var spoon = _embedder.GetEmbeddings("spoon");
+
+        Console.WriteLine(string.Join(",", cat));
+
+        var close = Dot(cat, kitten);
+        var far = Dot(cat, spoon);
+
+        Assert.True(close < far);
+    }
+}