stabilizaiton work - projects rework for maintenanceability and ui livening

src/__Libraries/__Tests/StellaOps.ReachGraph.Cache.Tests/ReachGraphValkeyCacheTestData.cs

@@ -0,0 +1,68 @@
+using System.Collections.Immutable;
+using System.IO;
+using System.IO.Compression;
+using StellaOps.ReachGraph.Schema;
+
+namespace StellaOps.ReachGraph.Cache.Tests;
+
+internal static class ReachGraphValkeyCacheTestData
+{
+    public static ReachGraphMinimal CreateGraph(string digest)
+    {
+        return new ReachGraphMinimal
+        {
+            Artifact = new ReachGraphArtifact(
+                "svc.payments",
+                digest,
+                ImmutableArray.Create("linux/amd64")),
+            Scope = new ReachGraphScope(
+                ImmutableArray.Create("/app/bin/svc"),
+                ImmutableArray.Create("prod")),
+            Nodes = ImmutableArray.Create(new ReachGraphNode
+            {
+                Id = "node-1",
+                Kind = ReachGraphNodeKind.Package,
+                Ref = "pkg:npm/lodash@4.17.21",
+                IsEntrypoint = true
+            }),
+            Edges = ImmutableArray.Create(new ReachGraphEdge
+            {
+                From = "node-1",
+                To = "node-1",
+                Why = new EdgeExplanation
+                {
+                    Type = EdgeExplanationType.Import,
+                    Confidence = 1.0
+                }
+            }),
+            Provenance = new ReachGraphProvenance
+            {
+                Inputs = new ReachGraphInputs
+                {
+                    Sbom = "sha256:sbom"
+                },
+                ComputedAt = new DateTimeOffset(2026, 1, 2, 3, 4, 5, TimeSpan.Zero),
+                Analyzer = new ReachGraphAnalyzer("reach-graph", "1.0.0", "sha256:tool")
+            }
+        };
+    }
+
+    public static byte[] Compress(byte[] data)
+    {
+        using var output = new MemoryStream();
+        using (var gzip = new GZipStream(output, CompressionLevel.Fastest, leaveOpen: true))
+        {
+            gzip.Write(data);
+        }
+        return output.ToArray();
+    }
+
+    public static byte[] Decompress(byte[] compressed)
+    {
+        using var input = new MemoryStream(compressed);
+        using var gzip = new GZipStream(input, CompressionMode.Decompress);
+        using var output = new MemoryStream();
+        gzip.CopyTo(output);
+        return output.ToArray();
+    }
+}