comments implement

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

@@ -0,0 +1,40 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import type { ICommentRepository } from '../../../domain/repositories/comment.repository.interface.js';
+import type { IIssueRepository } from '../../../../issue/domain/repositories/issue.repository.interface.js';
+import { IssueNotFoundException } from '../../../../issue/domain/exceptions/issue-not-found.exception.js';
+import { ListCommentsUseCase } from './list-comments.use-case.js';
+import { ListCommentsQuery } from './list-comments.query.js';
+import { buildComment, buildIssue, mockAuthorExpander, mockCommentRepository, mockIssueRepository } from '../test-helpers.js';
+
+describe('ListCommentsUseCase', () => {
+  let commentRepository: ICommentRepository;
+  let issueRepository: IIssueRepository;
+  let useCase: ListCommentsUseCase;
+
+  beforeEach(() => {
+    commentRepository = mockCommentRepository();
+    issueRepository = mockIssueRepository();
+    useCase = new ListCommentsUseCase(commentRepository, issueRepository, mockAuthorExpander());
+  });
+
+  it('forwards pagination params and returns the next cursor', async () => {
+    vi.mocked(issueRepository.findById).mockResolvedValue(buildIssue());
+    vi.mocked(commentRepository.findByIssue).mockResolvedValue({
+      list: [buildComment({ id: 'comment-2' })],
+      nextCursor: 'comment-2',
+    });
+
+    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(result.list.map((comment) => comment.id)).toEqual(['comment-2']);
+    expect(result.nextCursor).toBe('comment-2');
+  });
+
+  it('throws IssueNotFoundException when the issue is not visible to the user', async () => {
+    vi.mocked(issueRepository.findById).mockResolvedValue(null);
+
+    await expect(useCase.execute(new ListCommentsQuery(1, 'user-2', 50))).rejects.toThrow(IssueNotFoundException);
+    expect(commentRepository.findByIssue).not.toHaveBeenCalled();
+  });
+});