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src/Scanner/__Tests/StellaOps.Scanner.Reachability.Tests/ReachabilityUnionWriterTests.cs

@@ -139,6 +139,33 @@ public class ReachabilityUnionWriterTests
         Assert.Contains("\"score\":0.8", edgeLines[0]);
     }
 
+    [Fact]
+    public async Task WritesSymbolMetadataAndCodeBlockHash()
+    {
+        var writer = new ReachabilityUnionWriter();
+        using var temp = new TempDir();
+
+        var graph = new ReachabilityUnionGraph(
+            Nodes: new[]
+            {
+                new ReachabilityUnionNode(
+                    "sym:binary:foo",
+                    "binary",
+                    "function",
+                    "ssl3_read_bytes",
+                    CodeBlockHash: "sha256:deadbeef",
+                    Symbol: new ReachabilitySymbol("_Z15ssl3_read_bytes", "ssl3_read_bytes", "DWARF", 0.98))
+            },
+            Edges: Array.Empty<ReachabilityUnionEdge>());
+
+        var result = await writer.WriteAsync(graph, temp.Path, "analysis-symbol");
+
+        var nodeLines = await File.ReadAllLinesAsync(result.Nodes.Path);
+        Assert.Single(nodeLines);
+        Assert.Contains("\"code_block_hash\":\"sha256:deadbeef\"", nodeLines[0]);
+        Assert.Contains("\"symbol\":{\"mangled\":\"_Z15ssl3_read_bytes\",\"demangled\":\"ssl3_read_bytes\",\"source\":\"DWARF\",\"confidence\":0.98}", nodeLines[0]);
+    }
+
     [Fact]
     public async Task OmitsPurlAndSymbolDigestWhenNull()
     {