comments implement

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

@@ -0,0 +1,73 @@
+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 { CommentNotFoundException } from '../../../domain/exceptions/comment-not-found.exception.js';
+import { CommentForbiddenException } from '../../../domain/exceptions/comment-forbidden.exception.js';
+import { CommentEventsService } from '../../services/comment-events.service.js';
+import { CommentAccessService } from '../../services/comment-access.service.js';
+import { UpdateCommentUseCase } from './update-comment.use-case.js';
+import { UpdateCommentCommand } from './update-comment.command.js';
+import { buildComment, buildIssue, mockAuthorExpander, mockCommentRepository, mockIssueRepository } from '../test-helpers.js';
+
+describe('UpdateCommentUseCase', () => {
+  let commentRepository: ICommentRepository;
+  let issueRepository: IIssueRepository;
+  let commentEventsService: CommentEventsService;
+  let useCase: UpdateCommentUseCase;
+  let received: unknown[];
+
+  beforeEach(() => {
+    commentRepository = mockCommentRepository();
+    issueRepository = mockIssueRepository();
+    commentEventsService = new CommentEventsService();
+    useCase = new UpdateCommentUseCase(
+      commentRepository,
+      new CommentAccessService(commentRepository, issueRepository),
+      mockAuthorExpander(),
+      commentEventsService,
+    );
+    received = [];
+    commentEventsService.onEvents().subscribe((event) => received.push(event));
+    vi.mocked(issueRepository.findById).mockResolvedValue(buildIssue());
+  });
+
+  it('updates the content and emits comment.updated', async () => {
+    vi.mocked(commentRepository.findById).mockResolvedValue(buildComment());
+
+    const dto = await useCase.execute(new UpdateCommentCommand('comment-1', 'user-1', 'Changed'));
+
+    expect(dto.content).toBe('Changed');
+    expect(dto.editedAt).toBeInstanceOf(Date);
+    expect(commentRepository.update).toHaveBeenCalledTimes(1);
+    expect(received).toEqual([{ type: 'comment.updated', comment: dto }]);
+  });
+
+  it('skips saving and events when content did not change', async () => {
+    vi.mocked(commentRepository.findById).mockResolvedValue(buildComment());
+
+    await useCase.execute(new UpdateCommentCommand('comment-1', 'user-1', 'Original'));
+
+    expect(commentRepository.update).not.toHaveBeenCalled();
+    expect(received).toEqual([]);
+  });
+
+  it('throws CommentForbiddenException for a non-author', async () => {
+    vi.mocked(commentRepository.findById).mockResolvedValue(buildComment());
+
+    await expect(useCase.execute(new UpdateCommentCommand('comment-1', 'user-2', 'Changed'))).rejects.toThrow(CommentForbiddenException);
+    expect(commentRepository.update).not.toHaveBeenCalled();
+  });
+
+  it('throws CommentNotFoundException for a deleted comment', async () => {
+    vi.mocked(commentRepository.findById).mockResolvedValue(buildComment({ deletedAt: new Date() }));
+
+    await expect(useCase.execute(new UpdateCommentCommand('comment-1', 'user-1', 'Changed'))).rejects.toThrow(CommentNotFoundException);
+  });
+
+  it('throws CommentNotFoundException when the issue is not visible to the user', async () => {
+    vi.mocked(commentRepository.findById).mockResolvedValue(buildComment());
+    vi.mocked(issueRepository.findById).mockResolvedValue(null);
+
+    await expect(useCase.execute(new UpdateCommentCommand('comment-1', 'user-1', 'Changed'))).rejects.toThrow(CommentNotFoundException);
+  });
+});