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

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+using Microsoft.Extensions.Time.Testing;
+using StellaOps.Policy.Engine.Ledger;
+using StellaOps.Policy.Engine.Orchestration;
+
+namespace StellaOps.Policy.Engine.Tests;
+
+public sealed class LedgerExportServiceTests
+{
+    [Fact]
+    public async Task BuildAsync_ProducesOrderedNdjson()
+    {
+        var clock = new FakeTimeProvider(DateTimeOffset.Parse("2025-11-24T15:00:00Z"));
+        var jobStore = new InMemoryOrchestratorJobStore();
+        var resultStore = new InMemoryWorkerResultStore(jobStore);
+        var exportStore = new InMemoryLedgerExportStore();
+        var service = new LedgerExportService(clock, jobStore, resultStore, exportStore);
+
+        var job = new OrchestratorJob(
+            JobId: "job-1",
+            TenantId: "acme",
+            ContextId: "ctx",
+            PolicyProfileHash: "hash",
+            RequestedAt: clock.GetUtcNow(),
+            Priority: "normal",
+            BatchItems: new[]
+            {
+                new OrchestratorJobItem("pkg:b", "ADV-2"),
+                new OrchestratorJobItem("pkg:a", "ADV-1")
+            },
+            Callbacks: null,
+            TraceRef: "trace",
+            Status: "completed",
+            DeterminismHash: "hash",
+            CompletedAt: clock.GetUtcNow(),
+            ResultHash: "res");
+
+        await jobStore.SaveAsync(job);
+
+        var result = new WorkerRunResult(
+            job.JobId,
+            "worker",
+            clock.GetUtcNow(),
+            clock.GetUtcNow(),
+            new[]
+            {
+                new WorkerResultItem("pkg:b", "ADV-2", "ok", "trace-b"),
+                new WorkerResultItem("pkg:a", "ADV-1", "violation", "trace-a")
+            },
+            "hash");
+
+        await resultStore.SaveAsync(result);
+
+        var export = await service.BuildAsync(new LedgerExportRequest("acme"));
+
+        Assert.Equal(2, export.Manifest.RecordCount);
+        Assert.Equal("policy-ledger-export-v1", export.Manifest.SchemaVersion);
+        Assert.Equal(3, export.Lines.Count); // manifest + 2 records
+        Assert.Contains(export.Records, r => r.ComponentPurl == "pkg:a");
+        Assert.Equal("pkg:a", export.Records[0].ComponentPurl);
+    }
+}