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typicode
277
src/service.test.ts
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277
src/service.test.ts
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import test from 'node:test'
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import assert from 'node:assert/strict'
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import { Low, Memory } from 'lowdb'
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import { ParsedUrlQuery } from 'querystring'
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import { Data, Item, PaginatedItems, Service } from './service.js'
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const defaultData = { posts: [] }
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const adapter = new Memory<Data>()
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const db = new Low<Data>(adapter, defaultData)
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const service = new Service(db)
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const POSTS = 'posts'
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const COMMENTS = 'comments'
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const UNKNOWN_RESOURCE = 'xxx'
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const UNKNOWN_ID = 'xxx'
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const post1 = { id: '1', title: 'a', views: 100, author: { name: 'foo' } }
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const post2 = { id: '2', title: 'b', views: 200, author: { name: 'bar' } }
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const post3 = { id: '3', title: 'c', views: 300, author: { name: 'baz' } }
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const comment1 = { id: '1', title: 'a', postId: '1' }
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const items = 3
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function reset() {
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const post1 = { id: '1', title: 'a', views: 100, author: { name: 'foo' } }
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const post2 = { id: '2', title: 'b', views: 200, author: { name: 'bar' } }
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const post3 = { id: '3', title: 'c', views: 300, author: { name: 'baz' } }
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const comment1 = { id: '1', title: 'a', postId: '1' }
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db.data = { posts: [post1, post2, post3], comments: [comment1] }
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}
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type Test = {
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data?: Data
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name: string
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params?: ParsedUrlQuery
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res: Item | Item[] | PaginatedItems | undefined
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error?: Error
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}
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test('findById', () => {
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reset()
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assert.deepEqual(service.findById(POSTS, '1', {}), db.data?.[POSTS]?.[0])
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assert.equal(service.findById(POSTS, UNKNOWN_ID, {}), undefined)
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assert.deepEqual(service.findById(POSTS, '1', { _include: ['comments'] }), {
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...post1,
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comments: [comment1],
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})
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assert.deepEqual(service.findById(COMMENTS, '1', { _include: ['post'] }), {
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...comment1,
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post: post1,
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})
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assert.equal(service.findById(UNKNOWN_RESOURCE, '1', {}), undefined)
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})
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test('find', () => {
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const arr: Test[] = [
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{
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name: POSTS,
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res: [post1, post2, post3],
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},
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{
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name: POSTS,
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params: { id: post1.id },
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res: [post1],
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},
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{
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name: POSTS,
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params: { id: UNKNOWN_ID },
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res: [],
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},
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{
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name: POSTS,
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params: { views: post1.views.toString() },
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res: [post1],
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},
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{
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name: POSTS,
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params: { 'author.name': post1.author.name },
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res: [post1],
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},
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{
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name: POSTS,
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params: { id: UNKNOWN_ID, views: post1.views.toString() },
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res: [],
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},
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{
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name: POSTS,
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params: { views_ne: post1.views.toString() },
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res: [post2, post3],
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},
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{
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name: POSTS,
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params: { views_lt: (post1.views + 1).toString() },
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res: [post1],
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},
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{
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name: POSTS,
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params: { views_lt: post1.views.toString() },
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res: [],
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},
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{
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name: POSTS,
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params: { views_lte: post1.views.toString() },
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res: [post1],
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},
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{
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name: POSTS,
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params: { views_gt: post1.views.toString() },
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res: [post2, post3],
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},
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{
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name: POSTS,
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params: { views_gt: (post1.views - 1).toString() },
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res: [post1, post2, post3],
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},
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{
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name: POSTS,
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params: { views_gte: post1.views.toString() },
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res: [post1, post2, post3],
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},
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{
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data: { posts: [post3, post1, post2] },
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name: POSTS,
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params: { _sort: 'views' },
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res: [post1, post2, post3],
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},
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{
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data: { posts: [post3, post1, post2] },
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name: POSTS,
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params: { _sort: '-views' },
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res: [post3, post2, post1],
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},
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{
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data: { posts: [post3, post1, post2] },
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name: POSTS,
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params: { _sort: '-views,id' },
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res: [post3, post2, post1],
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},
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{
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name: POSTS,
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params: { _start: '0', _end: '2' },
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res: [post1, post2],
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},
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{
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name: POSTS,
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params: { _start: '1', _end: '3' },
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res: [post2, post3],
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},
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{
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name: POSTS,
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params: { _start: '0', _limit: '2' },
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res: [post1, post2],
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},
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{
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name: POSTS,
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params: { _start: '1', _limit: '2' },
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res: [post2, post3],
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},
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{
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name: POSTS,
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params: { _page: '1', _per_page: '2' },
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res: {
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first: 1,
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last: 2,
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prev: null,
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next: 2,
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pages: 2,
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items,
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data: [post1, post2],
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},
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},
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{
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name: POSTS,
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params: { _page: '2', _per_page: '2' },
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res: {
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first: 1,
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last: 2,
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prev: 1,
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next: null,
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pages: 2,
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items,
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data: [post3],
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},
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},
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{
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name: POSTS,
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params: { _page: '3', _per_page: '2' },
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res: {
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first: 1,
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last: 2,
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prev: 1,
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next: null,
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pages: 2,
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items,
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data: [post3],
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},
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},
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{
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name: POSTS,
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params: { _include: ['comments'] },
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res: [
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{ ...post1, comments: [comment1] },
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{ ...post2, comments: [] },
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{ ...post3, comments: [] },
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],
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},
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{
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name: COMMENTS,
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params: { _include: ['post'] },
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res: [{ ...comment1, post: post1 }],
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},
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{
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name: UNKNOWN_RESOURCE,
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res: undefined,
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},
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]
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for (const tc of arr) {
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if (tc.data) {
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db.data = tc.data
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} else {
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reset()
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}
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assert.deepEqual(service.find(tc.name, tc.params), tc.res)
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}
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})
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test('create', async () => {
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reset()
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const post = { title: 'new post' }
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const res = await service.create(POSTS, post)
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assert.equal(res?.['title'], post.title)
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assert.equal(res?.['id'].length, 4, 'id should be 4 chars')
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assert.equal(await service.create(UNKNOWN_RESOURCE, post), undefined)
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})
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test('update', async () => {
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reset()
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const post = { id: 'xxx', title: 'updated post' }
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const res = await service.update(POSTS, post1.id, post)
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assert.equal(res?.['id'], post1.id, 'id should not change')
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assert.equal(res?.['title'], post.title)
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assert.equal(
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await service.update(UNKNOWN_RESOURCE, post1.id, post),
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undefined,
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)
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assert.equal(await service.update(POSTS, UNKNOWN_ID, post), undefined)
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})
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test('patch', async () => {
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reset()
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const post = { id: 'xxx', title: 'updated post' }
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const res = await service.patch(POSTS, post1.id, post)
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assert.notEqual(res, undefined)
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assert.equal(res?.['id'], post1.id)
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assert.equal(res?.['title'], post.title)
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assert.equal(await service.patch(UNKNOWN_RESOURCE, post1.id, post), undefined)
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assert.equal(await service.patch(POSTS, UNKNOWN_ID, post), undefined)
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})
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test('destroy', async () => {
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reset()
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let prevLength = db.data?.[POSTS]?.length || 0
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await service.destroy(POSTS, post1.id)
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assert.equal(db.data?.[POSTS]?.length, prevLength - 1)
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assert.deepEqual(db.data?.[COMMENTS], [{ ...comment1, postId: null }])
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reset()
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prevLength = db.data?.[POSTS]?.length || 0
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await service.destroy(POSTS, post1.id, [COMMENTS])
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assert.equal(db.data[POSTS].length, prevLength - 1)
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assert.equal(db.data[COMMENTS].length, 0)
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assert.equal(await service.destroy(UNKNOWN_RESOURCE, post1.id), undefined)
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assert.equal(await service.destroy(POSTS, UNKNOWN_ID), undefined)
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})
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