sort comments

src/modules/comment/application/use-cases/list-comments/list-comments.use-case.spec.ts

@@ -32,11 +32,30 @@ describe('ListCommentsUseCase', () => {
 
     const result = await useCase.execute(new ListCommentsQuery(1, 'user-1', 1, 'comment-1'));
 
-    expect(commentRepository.findByIssue).toHaveBeenCalledWith({ issueId: 1, limit: 1, cursor: 'comment-1' });
+    expect(commentRepository.findByIssue).toHaveBeenCalledWith({
+      issueId: 1,
+      limit: 1,
+      cursor: 'comment-1',
+      direction: 'forward',
+    });
     expect(result.list.map((comment) => comment.id)).toEqual(['comment-2']);
     expect(result.nextCursor).toBe('comment-2');
   });
 
+  it('forwards the backward direction for chat-style paging', async () => {
+    vi.mocked(issueRepository.findById).mockResolvedValue(buildIssue());
+    vi.mocked(commentRepository.findByIssue).mockResolvedValue({ list: [], nextCursor: null });
+
+    await useCase.execute(new ListCommentsQuery(1, 'user-1', 20, 'comment-5', 'backward'));
+
+    expect(commentRepository.findByIssue).toHaveBeenCalledWith({
+      issueId: 1,
+      limit: 20,
+      cursor: 'comment-5',
+      direction: 'backward',
+    });
+  });
+
   it('throws IssueNotFoundException when the issue is not visible to the user', async () => {
     vi.mocked(issueRepository.findById).mockResolvedValue(null);