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src/Policy/__Tests/StellaOps.Policy.Engine.Tests/TrustWeightingServiceTests.cs

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+using StellaOps.Policy.Engine.TrustWeighting;
+
+namespace StellaOps.Policy.Engine.Tests;
+
+public sealed class TrustWeightingServiceTests
+{
+    [Fact]
+    public void Get_ReturnsDefaultsWithHash()
+    {
+        var service = new TrustWeightingService(TimeProvider.System);
+
+        var profile = service.Get();
+
+        Assert.NotEmpty(profile.Weights);
+        Assert.False(string.IsNullOrWhiteSpace(profile.ProfileHash));
+    }
+
+    [Fact]
+    public void Set_NormalizesOrderingAndScale()
+    {
+        var service = new TrustWeightingService(TimeProvider.System);
+        var now = TimeProvider.System.GetUtcNow().ToString("O");
+
+        var profile = service.Set(new[]
+        {
+            new TrustWeightingEntry("Scanner", 1.2345m, "   hi ", now),
+            new TrustWeightingEntry("cartographer", 0.9999m, null, now)
+        });
+
+        Assert.Equal(2, profile.Weights.Count);
+        Assert.Equal("cartographer", profile.Weights[0].Source);
+        Assert.Equal(0.999m, profile.Weights[0].Weight);
+        Assert.Equal(1.234m, profile.Weights[1].Weight);
+        Assert.False(string.IsNullOrWhiteSpace(profile.ProfileHash));
+    }
+}