From 4e8469a1759cd161dc756cb4d9fb5728fe604da7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=8E=89=E6=BE=9C?= <yulan.wqy@alibaba-inc.com>
Date: Mon, 17 Aug 2026 15:25:32 +0800
Subject: [PATCH] test(skills): cover Windows same-file identity seam with
 synthetic info

skillPathSameFileIdentityImpl on Windows always returns false and is
never reached through skillPathIdentityProven (which uses file IDs
exclusively). Add a direct seam call with synthetic os.FileInfo to
exercise the Windows return-false path and the Unix os.SameFile path
with nil Sys().
---
 internal/upgrade/skill_publication_test.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/internal/upgrade/skill_publication_test.go b/internal/upgrade/skill_publication_test.go
index 6be9aa58..2748f8ea 100644
--- a/internal/upgrade/skill_publication_test.go
+++ b/internal/upgrade/skill_publication_test.go
@@ -456,6 +456,12 @@ func TestCrossPlatformCoverageSkillPublicationFailureEdges(t *testing.T) {
 				t.Fatal("empty incarnation")
 			}
 		})
+		t.Run("synthetic info does not match same-file identity", func(t *testing.T) {
+			fake := skillPathFakeInfo{}
+			if skillPathSameFileIdentity(fake, fake) {
+				t.Fatal("synthetic info should not match")
+			}
+		})
 	})
 }