import { CommentService } from '../../src/internal/services/comment-service'
import { HttpClient } from '../../src/internal/http-client'
import type { SubstackComment, SubstackCommentResponse } from '../../src/internal'
// Mock the http client
jest.mock('../../src/internal/http-client')
describe('CommentService', () => {
let commentService: CommentService
let mockHttpClient: jest.Mocked<HttpClient>
beforeEach(() => {
jest.clearAllMocks()
mockHttpClient = new HttpClient('https://test.substack.com', {
apiKey: 'test',
hostname: 'test.com'
}) as jest.Mocked<HttpClient>
mockHttpClient.get = jest.fn()
commentService = new CommentService(mockHttpClient)
})
describe('getCommentsForPost', () => {
it('should fetch comments for a post successfully', async () => {
const mockComments: SubstackComment[] = [
{
id: 1,
body: 'Test comment 1',
created_at: '2023-01-01T00:00:00Z',
parent_post_id: 123,
author_id: 456,
author_name: 'Test Author',
author_is_admin: false
},
{
id: 2,
body: 'Test comment 2',
created_at: '2023-01-02T00:00:00Z',
parent_post_id: 123,
author_id: 789,
author_name: 'Another Author',
author_is_admin: true
}
]
const mockResponse = { comments: mockComments }
mockHttpClient.get.mockResolvedValue(mockResponse)
const result = await commentService.getCommentsForPost(123)
expect(mockHttpClient.get).toHaveBeenCalledWith('/api/v1/post/123/comments')
expect(result).toEqual(mockComments)
})
it('should return empty array when no comments exist', async () => {
const mockResponse = { comments: undefined }
mockHttpClient.get.mockResolvedValue(mockResponse)
const result = await commentService.getCommentsForPost(123)
expect(mockHttpClient.get).toHaveBeenCalledWith('/api/v1/post/123/comments')
expect(result).toEqual([])
})
it('should return empty array when comments field is null', async () => {
const mockResponse = { comments: null }
mockHttpClient.get.mockResolvedValue(mockResponse)
const result = await commentService.getCommentsForPost(123)
expect(mockHttpClient.get).toHaveBeenCalledWith('/api/v1/post/123/comments')
expect(result).toEqual([])
})
it('should throw error when request fails', async () => {
const error = new Error('Network error')
mockHttpClient.get.mockRejectedValue(error)
await expect(commentService.getCommentsForPost(123)).rejects.toThrow('Network error')
expect(mockHttpClient.get).toHaveBeenCalledWith('/api/v1/post/123/comments')
})
})
describe('getCommentById', () => {
it('should fetch a comment by ID successfully', async () => {
const mockCommentResponse: SubstackCommentResponse = {
item: {
comment: {
id: 123,
body: 'Test comment body',
user_id: 456,
name: 'Test Author',
date: '2023-01-01T00:00:00Z',
post_id: 789
}
}
}
mockHttpClient.get.mockResolvedValue(mockCommentResponse)
const result = await commentService.getCommentById(123)
expect(mockHttpClient.get).toHaveBeenCalledWith('/api/v1/reader/comment/123')
expect(result).toEqual({
id: 123,
body: 'Test comment body',
created_at: '2023-01-01T00:00:00Z',
parent_post_id: 789,
author_id: 456,
author_name: 'Test Author',
author_is_admin: false
})
})
it('should handle comment with null post_id', async () => {
const mockCommentResponse: SubstackCommentResponse = {
item: {
comment: {
id: 123,
body: 'Test comment body',
user_id: 456,
name: 'Test Author',
date: '2023-01-01T00:00:00Z',
post_id: null
}
}
}
mockHttpClient.get.mockResolvedValue(mockCommentResponse)
const result = await commentService.getCommentById(123)
expect(mockHttpClient.get).toHaveBeenCalledWith('/api/v1/reader/comment/123')
expect(result.parent_post_id).toBe(0)
})
it('should throw error when comment is not found', async () => {
const error = new Error('Comment not found')
mockHttpClient.get.mockRejectedValue(error)
await expect(commentService.getCommentById(123)).rejects.toThrow('Comment not found')
expect(mockHttpClient.get).toHaveBeenCalledWith('/api/v1/reader/comment/123')
})
})
})
