From 9dff1141d40066663711d13e5007c7ec694f8142 Mon Sep 17 00:00:00 2001
From: "DESKTOP-L8OUL9F\\gfl0034" <1003614916@qq.com>
Date: Sun, 18 Oct 2026 22:06:12 +0800
Subject: [PATCH] =?UTF-8?q?test:=20=E4=BA=92=E5=85=B3=E5=90=8E=E4=BB=BB?=
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DeleteFriend 一次删掉两条好友边，消息仍留在会话里。

Co-authored-by: Cursor <cursoragent@cursor.com>
---
 internal/module/friend/logic/follow.go      |  1 +
 internal/module/friend/logic/follow_test.go | 38 +++++++++++++++++++--
 2 files changed, 36 insertions(+), 3 deletions(-)

diff --git a/internal/module/friend/logic/follow.go b/internal/module/friend/logic/follow.go
index 0344737..5dd5b5e 100644
--- a/internal/module/friend/logic/follow.go
+++ b/internal/module/friend/logic/follow.go
@@ -51,6 +51,7 @@ func (s *Service) Unfollow(ctx context.Context, userID, targetID int64) (*Follow
 		return nil, err
 	}
 	if mutual {
+		// DeleteFriend removes both directed edges. Messages stay.
 		if err := s.repo.DeleteFriend(ctx, userID, targetID); err != nil && !errors.Is(err, errs.ErrNotFound) {
 			return nil, err
 		}
diff --git a/internal/module/friend/logic/follow_test.go b/internal/module/friend/logic/follow_test.go
index 6a57e72..5e89477 100644
--- a/internal/module/friend/logic/follow_test.go
+++ b/internal/module/friend/logic/follow_test.go
@@ -93,13 +93,45 @@ func TestUnfollowMutualDropsFriendsKeepsMessage(t *testing.T) {
 	if err != nil || view.Following || view.Mutual || view.Friend || !view.FollowedBy {
 		t.Fatalf("%+v %v", view, err)
 	}
+	peer, err := svc.GetFollow(ctx, b.ID, a.ID)
+	if err != nil || peer.Friend || peer.Mutual {
+		t.Fatalf("peer %+v %v", peer, err)
+	}
+	if _, err := svc.Relation(ctx, a.ID, b.ID); !errors.Is(err, errs.ErrNotFound) {
+		t.Fatalf("edge a->b %v", err)
+	}
+	if _, err := svc.Relation(ctx, b.ID, a.ID); !errors.Is(err, errs.ErrNotFound) {
+		t.Fatalf("edge b->a %v", err)
+	}
 	after, err := msgs.ListByConversation(ctx, conv.ID, a.ID, 0, 20)
 	if err != nil || len(after) != 1 || after[0].ID != before[0].ID {
 		t.Fatalf("after %d %v", len(after), err)
 	}
-	ok, err := svc.AreFriends(ctx, a.ID, b.ID)
-	if err != nil || ok {
-		t.Fatalf("still friends %v %v", ok, err)
+}
+
+func TestOtherSideUnfollowRemovesBothEdges(t *testing.T) {
+	svc, users, _ := testFriends(t)
+	ctx := t.Context()
+	a, b := twoUsers(t, users)
+	if _, err := svc.Follow(ctx, a.ID, b.ID); err != nil {
+		t.Fatal(err)
+	}
+	if view, err := svc.Follow(ctx, b.ID, a.ID); err != nil || !view.Friend {
+		t.Fatalf("mutual %+v %v", view, err)
+	}
+	view, err := svc.Unfollow(ctx, b.ID, a.ID)
+	if err != nil || view.Friend || view.Mutual {
+		t.Fatalf("unfollow %+v %v", view, err)
+	}
+	if _, err := svc.Relation(ctx, a.ID, b.ID); !errors.Is(err, errs.ErrNotFound) {
+		t.Fatalf("edge a->b %v", err)
+	}
+	if _, err := svc.Relation(ctx, b.ID, a.ID); !errors.Is(err, errs.ErrNotFound) {
+		t.Fatalf("edge b->a %v", err)
+	}
+	left, err := svc.GetFollow(ctx, a.ID, b.ID)
+	if err != nil || left.Friend || !left.Following {
+		t.Fatalf("remaining follow %+v %v", left, err)
 	}
 }