手动数据源、存图、流程计算

XplorePlane.Tests/Services/CancellationSummaryPropertyTests.cs

@@ -113,10 +113,13 @@ namespace XplorePlane.Tests.Services
         }
 
         // ── Generator: N SavePositionNodes with cancellation point K ─────
+        // K ranges from 1 to N-1: K positions complete, then cancellation is detected
+        // before position K+1 starts. This ensures the summary is always written.
+        // (K=0 would require pre-cancellation which skips BeginRunAsync entirely)
 
         private static Gen<(List<SavePositionNode> Nodes, int CancelAfterK)> SavePositionNodesWithCancelGen =>
             from n in Gen.Choose(2, 10)
-            from k in Gen.Choose(0, n - 1)
+            from k in Gen.Choose(1, n - 1)
             from nodes in GenSavePositionNodes(n)
             select (nodes, k);