{"id":89370,"date":"2024-12-22T14:30:49","date_gmt":"2024-12-22T11:00:49","guid":{"rendered":"https:\/\/nabfollower.com\/blog\/functional-programming-with-fp-ts-in-nodejs-3239\/"},"modified":"2024-12-22T14:30:49","modified_gmt":"2024-12-22T11:00:49","slug":"functional-programming-with-fp-ts-in-nodejs-3239","status":"publish","type":"post","link":"https:\/\/nabfollower.com\/blog\/functional-programming-with-fp-ts-in-nodejs-3239\/","title":{"rendered":"\u0628\u0631\u0646\u0627\u0645\u0647 \u0646\u0648\u06cc\u0633\u06cc \u06a9\u0627\u0631\u0628\u0631\u062f\u06cc \u0628\u0627 fp-ts \u062f\u0631 Node.js"},"content":{"rendered":"

Summarize this content to 400 words in Persian Lang <\/p>\n

\u0645\u0642\u062f\u0645\u0647<\/p>\n

\u0628\u0631\u0646\u0627\u0645\u0647 \u0646\u0648\u06cc\u0633\u06cc \u062a\u0627\u0628\u0639\u06cc (FP) \u0628\u0647 \u062f\u0644\u06cc\u0644 \u062a\u0631\u06a9\u06cc\u0628 \u067e\u0630\u06cc\u0631\u06cc\u060c \u0622\u0632\u0645\u0627\u06cc\u0634 \u067e\u0630\u06cc\u0631\u06cc \u0648 \u0627\u0633\u062a\u062d\u06a9\u0627\u0645 \u0622\u0646 \u0645\u062d\u0628\u0648\u0628\u06cc\u062a \u067e\u06cc\u062f\u0627 \u06a9\u0631\u062f\u0647 \u0627\u0633\u062a. \u062f\u0631 \u0627\u06a9\u0648\u0633\u06cc\u0633\u062a\u0645 \u062c\u0627\u0648\u0627 \u0627\u0633\u06a9\u0631\u06cc\u067e\u062a\u060c \u06a9\u062a\u0627\u0628\u062e\u0627\u0646\u0647 \u0647\u0627 \u0645\u0627\u0646\u0646\u062f fp-ts \u0645\u0641\u0627\u0647\u06cc\u0645 \u0642\u062f\u0631\u062a\u0645\u0646\u062f FP \u0631\u0627 \u0628\u0647 TypeScript \u0628\u06cc\u0627\u0648\u0631\u06cc\u062f \u0648 \u0628\u0647 \u0634\u0645\u0627 \u0627\u0645\u06a9\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f \u06a9\u062f\u0647\u0627\u06cc \u062a\u0645\u06cc\u0632\u062a\u0631 \u0648 \u0642\u0627\u0628\u0644 \u0627\u0639\u062a\u0645\u0627\u062f\u062a\u0631\u06cc \u0628\u0646\u0648\u06cc\u0633\u06cc\u062f.<\/p>\n

\u0627\u06cc\u0646 \u0645\u0642\u0627\u0644\u0647 \u0628\u0631\u0631\u0633\u06cc \u0645\u06cc \u06a9\u0646\u062f fp-ts \u0645\u0641\u0627\u0647\u06cc\u0645\u06cc \u0645\u0627\u0646\u0646\u062f Option\u060c Either\u060c Task\u060c Reader\u060c \u0648 ReaderTaskEither. \u0645\u0627 \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u06cc\u06a9 \u0628\u0631\u0646\u0627\u0645\u0647 \u0627\u0648\u0644\u06cc\u0647 CRUD \u062e\u0648\u0627\u0647\u06cc\u0645 \u0633\u0627\u062e\u062a fp-ts\u060c \u0635\u0641\u062d\u0647 (\u06a9\u0644\u0627\u06cc\u0646\u062a PostgreSQL)\u060c \u0648 Express.js \u0628\u0631\u0627\u06cc \u062f\u06cc\u062f\u0646 \u0627\u06cc\u0646\u06a9\u0647 \u0686\u06af\u0648\u0646\u0647 \u0627\u06cc\u0646 \u0627\u0646\u062a\u0632\u0627\u0639\u0627\u062a \u062f\u0631 \u06a9\u0627\u0631\u0628\u0631\u062f\u0647\u0627\u06cc \u062f\u0646\u06cc\u0627\u06cc \u0648\u0627\u0642\u0639\u06cc \u0645\u06cc \u062f\u0631\u062e\u0634\u0646\u062f.<\/p>\n

\u0645\u0641\u0627\u0647\u06cc\u0645 \u06a9\u0644\u06cc\u062f\u06cc<\/p>\n

\u0642\u0628\u0644 \u0627\u0632 \u0648\u0631\u0648\u062f \u0628\u0647 \u0628\u0631\u0646\u0627\u0645\u0647\u060c \u0627\u062c\u0627\u0632\u0647 \u062f\u0647\u06cc\u062f \u0628\u0647 \u0637\u0648\u0631 \u062e\u0644\u0627\u0635\u0647 \u062f\u0631 \u0645\u0648\u0631\u062f \u0645\u0641\u0627\u0647\u06cc\u0645 \u0627\u0635\u0644\u06cc \u0628\u062d\u062b \u06a9\u0646\u06cc\u0645:<\/p>\n

\u06af\u0632\u06cc\u0646\u0647: \u0648\u062c\u0648\u062f \u06cc\u0627 \u0639\u062f\u0645 \u0648\u062c\u0648\u062f \u06cc\u06a9 \u0645\u0642\u062f\u0627\u0631 \u0631\u0627 \u0645\u062f\u0644 \u0645\u06cc \u06a9\u0646\u062f (Some \u06cc\u0627 None).<\/p>\n

\u0647\u0631 \u062f\u0648: \u0646\u0634\u0627\u0646 \u062f\u0647\u0646\u062f\u0647 \u0645\u062d\u0627\u0633\u0628\u0627\u062a\u06cc \u0627\u0633\u062a \u06a9\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646\u0646\u062f \u0645\u0648\u0641\u0642 \u0634\u0648\u0646\u062f (Right) \u06cc\u0627 \u0634\u06a9\u0633\u062a \u0628\u062e\u0648\u0631\u062f (Left).<\/p>\n

\u0648\u0638\u06cc\u0641\u0647: \u0646\u0634\u0627\u0646 \u062f\u0647\u0646\u062f\u0647 \u0645\u062d\u0627\u0633\u0628\u0627\u062a \u0646\u0627\u0647\u0645\u0632\u0645\u0627\u0646 \u062a\u0646\u0628\u0644 \u0627\u0633\u062a.<\/p>\n

\u062e\u0648\u0627\u0646\u0646\u062f\u0647: \u0648\u0627\u0628\u0633\u062a\u06af\u06cc \u0647\u0627 \u0631\u0627 \u0628\u0647 \u0645\u062d\u0627\u0633\u0628\u0627\u062a \u062a\u0632\u0631\u06cc\u0642 \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n

ReaderTaskEither: Reader\u060c Task \u0648 Either \u0631\u0627 \u0628\u0631\u0627\u06cc \u0639\u0645\u0644\u06cc\u0627\u062a \u0646\u0627\u0647\u0645\u06af\u0627\u0645 \u0628\u0627 \u0648\u0627\u0628\u0633\u062a\u06af\u06cc \u0647\u0627 \u0648 \u0645\u062f\u06cc\u0631\u06cc\u062a \u062e\u0637\u0627 \u062a\u0631\u06a9\u06cc\u0628 \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n

\u0631\u0627\u0647 \u0627\u0646\u062f\u0627\u0632\u06cc \u067e\u0631\u0648\u0698\u0647<\/p>\n

\u067e\u0631\u0648\u0698\u0647 \u0631\u0627 \u0631\u0627\u0647 \u0627\u0646\u062f\u0627\u0632\u06cc \u06a9\u0646\u06cc\u062f<\/p>\n

mkdir fp-ts-crud && cd fp-ts-crud
\nnpm init -y
\nnpm install express pg fp-ts io-ts
\nnpm install –save-dev typescript @types\/express ts-node-dev jest @types\/jest ts-jest<\/p>\n

\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/p>\n

\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/p>\n

\u062a\u0646\u0638\u06cc\u0645 TypeScript<\/p>\n

\u0627\u06cc\u062c\u0627\u062f \u06cc\u06a9 tsconfig.json:<\/p>\n

{
\n “compilerOptions”: {
\n “target”: “ES2020”,
\n “module”: “CommonJS”,
\n “outDir”: “dist”,
\n “strict”: true,
\n “esModuleInterop”: true
\n },
\n “include”: [“src\/**\/*”]\n}<\/p>\n

\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/p>\n

\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/p>\n

\u0633\u0627\u062e\u062a\u0627\u0631 \u067e\u0631\u0648\u0698\u0647<\/p>\n

src\/
\n index.ts # Entry point
\n db.ts # Database setup
\n models\/ # Data models and validation
\n services\/ # Business logic
\n controllers\/ # CRUD operations
\n utils\/ # fp-ts utilities
\n errors\/ # Custom error classes<\/p>\n

\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/p>\n

\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/p>\n

\u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u0628\u0631\u0646\u0627\u0645\u0647 CRUD<\/p>\n

\u0631\u0627\u0647 \u0627\u0646\u062f\u0627\u0632\u06cc \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 (db.ts)<\/p>\n

import { Pool } from ‘pg’;<\/p>\n

export const pool = new Pool({
\n user: ‘postgres’,
\n host: ‘localhost’,
\n database: ‘fp_ts_crud’,
\n password: ‘password’,
\n port: 5432,
\n});<\/p>\n

\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/p>\n

\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/p>\n

\u062a\u0639\u0631\u06cc\u0641 \u0645\u062f\u0644 \u0647\u0627 \u0648 \u0627\u0639\u062a\u0628\u0627\u0631\u0633\u0646\u062c\u06cc (models\/User.ts)<\/p>\n

import * as t from ‘io-ts’;
\nimport { isRight } from ‘fp-ts\/Either’;<\/p>\n

export const User = t.type({
\n id: t.number,
\n name: t.string,
\n email: t.string,
\n});<\/p>\n

export const validateUser = (data: unknown): t.TypeOf<typeof User> | null => {
\n const result = User.decode(data);
\n return isRight(result) ? result.right : null;
\n};<\/p>\n

\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/p>\n

\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/p>\n

\u0645\u062f\u06cc\u0631\u06cc\u062a \u062e\u0637\u0627\u06cc \u0633\u0641\u0627\u0631\u0634\u06cc (errors\/AppError.ts)<\/p>\n

export class AppError extends Error {
\n constructor(public statusCode: number, public code: string, public message: string) {
\n super(message);
\n this.name = ‘AppError’;
\n }
\n}<\/p>\n

export const createAppError = (statusCode: number, code: string, message: string): AppError => {
\n return new AppError(statusCode, code, message);
\n};<\/p>\n

\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/p>\n

\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/p>\n

\u0644\u0627\u06cc\u0647 \u0633\u0631\u0648\u06cc\u0633 (services\/UserService.ts)<\/p>\n

import { pool } from ‘..\/db’;
\nimport { ReaderTaskEither, right, left } from ‘fp-ts\/ReaderTaskEither’;
\nimport { pipe } from ‘fp-ts\/function’;
\nimport { createAppError, AppError } from ‘..\/errors\/AppError’;
\nimport { validateUser } from ‘..\/models\/User’;<\/p>\n

type Dependencies = { db: typeof pool };
\ntype User = { name: string; email: string };<\/p>\n

export const createUser = (
\n user: User
\n): ReaderTaskEither<Dependencies, AppError, string> => (deps) => async () => {
\n \/\/ Validate the incoming user data
\n const validatedUser = validateUser(user);<\/p>\n

if (!validatedUser) {
\n return left(createAppError(400, ‘INVALID_USER_DATA’, ‘Invalid user data provided’));
\n }<\/p>\n

try {
\n const result = await deps.db.query(
\n ‘INSERT INTO users (name, email) VALUES ($1, $2) RETURNING id’,
\n [validatedUser.name, validatedUser.email]\n );
\n return right(`User created with ID: ${result.rows[0].id}`);
\n } catch (error) {
\n return left(createAppError(500, ‘USER_CREATION_FAILED’, ‘Failed to create user’));
\n }
\n};<\/p>\n

export const getUser = (
\n id: number
\n): ReaderTaskEither<Dependencies, AppError, { id: number; name: string; email: string }> => (deps) => async () => {
\n try {
\n const result = await deps.db.query(‘SELECT * FROM users WHERE id = $1’, [id]);
\n return result.rows[0]\n ? right(result.rows[0])
\n : left(createAppError(404, ‘USER_NOT_FOUND’, ‘User not found’));
\n } catch {
\n return left(createAppError(500, ‘USER_FETCH_FAILED’, ‘Failed to fetch user’));
\n }
\n};<\/p>\n

\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/p>\n

\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/p>\n

\u0639\u0645\u0644\u06cc\u0627\u062a CRUD (controllers\/UserController.ts)<\/p>\n

import { pipe } from ‘fp-ts\/function’;
\nimport { createUser, getUser } from ‘..\/services\/UserService’;
\nimport { pool } from ‘..\/db’;
\nimport { AppError } from ‘..\/errors\/AppError’;<\/p>\n

const errorHandler = (err: unknown, res: express.Response): void => {
\n if (err instanceof AppError) {
\n res.status(err.statusCode).json({ error: { code: err.code, message: err.message } });
\n } else {
\n res.status(500).json({ error: { code: ‘UNKNOWN_ERROR’, message: ‘An unexpected error occurred’ } });
\n }
\n};<\/p>\n

export const createUserHandler = (req: express.Request, res: express.Response): void => {
\n pipe(
\n createUser(req.body),
\n (task) => task({ db: pool }),
\n (promise) =>
\n promise.then((result) =>
\n result._tag === ‘Left’
\n ? errorHandler(result.left, res)
\n : res.json({ message: result.right })
\n )
\n );
\n};<\/p>\n

export const getUserHandler = (req: express.Request, res: express.Response): void => {
\n pipe(
\n getUser(parseInt(req.params.id, 10)),
\n (task) => task({ db: pool }),
\n (promise) =>
\n promise.then((result) =>
\n result._tag === ‘Left’
\n ? errorHandler(result.left, res)
\n : res.json(result.right)
\n )
\n );
\n};<\/p>\n

\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/p>\n

\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/p>\n

Express API (index.ts)<\/p>\n

import express from ‘express’;
\nimport { createUserHandler, getUserHandler } from ‘.\/controllers\/UserController’;<\/p>\n

const app = express();
\napp.use(express.json());<\/p>\n

\/\/ Routes
\napp.post(‘\/users’, createUserHandler);
\napp.get(‘\/users\/:id’, getUserHandler);<\/p>\n

\/\/ Start Server
\napp.listen(3000, () => {
\n console.log(‘Server running on http:\/\/localhost:3000’);
\n});<\/p>\n

\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/p>\n

\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/p>\n

\u0627\u062c\u0631\u0627\u06cc \u0628\u0631\u0646\u0627\u0645\u0647 \u0628\u0627 Docker \u0648 Docker Compose<\/p>\n

Dockerfile<\/p>\n

# Stage 1: Build
\nFROM node:22 AS builder
\nWORKDIR \/app
\nCOPY package*.json .
\nRUN npm install
\nCOPY . .
\nRUN npm run build<\/p>\n

# Stage 2: Run
\nFROM node:22
\nWORKDIR \/app
\nCOPY –from=builder \/app\/dist .\/dist
\nCOPY package*.json .\/
\nRUN npm install –production
\nCMD [“node”, “dist\/index.js”]\n

\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/p>\n

\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/p>\n

docker-compose.yml<\/p>\n

version: ‘3.8’
\nservices:
\n db:
\n image: postgres:15
\n environment:
\n POSTGRES_USER: postgres
\n POSTGRES_PASSWORD: password
\n POSTGRES_DB: fp_ts_crud
\n ports:
\n – “5432:5432”
\n volumes:
\n – db_data:\/var\/lib\/postgresql\/data
\nvolumes:
\n db_data:<\/p>\n

\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/p>\n

\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/p>\n

\u0628\u0631\u0646\u0627\u0645\u0647 – \u062d\u0627\u0644\u062a \u062a\u0648\u0633\u0639\u0647 \u0631\u0627 \u0627\u062c\u0631\u0627 \u06a9\u0646\u06cc\u062f<\/p>\n

# Start the database
\ndocker-compose up -d<\/p>\n

# Run the app
\nnpx ts-node-dev src\/index.ts<\/p>\n

\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/p>\n

\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/p>\n

\u0628\u0631\u0646\u0627\u0645\u0647 – \u062d\u0627\u0644\u062a \u062a\u0648\u0644\u06cc\u062f \u0631\u0627 \u0627\u062c\u0631\u0627 \u06a9\u0646\u06cc\u062f<\/p>\n

# Build the docker image
\ndocker build -t fp-ts-crud-app .<\/p>\n

# Start the database
\ndocker-compose up -d<\/p>\n

# Run the container
\ndocker run -p 3000:3000 fp-ts-crud-app<\/p>\n

\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/p>\n

\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/p>\n

\u062a\u0633\u062a \u0647\u0627\u06cc \u0646\u0648\u0634\u062a\u0627\u0631\u06cc<\/p>\n

\u0631\u0627\u0647 \u0627\u0646\u062f\u0627\u0632\u06cc \u0628\u0644\u0647<\/p>\n

\u0628\u0647 \u0631\u0648\u0632 \u0631\u0633\u0627\u0646\u06cc package.json \u0627\u0633\u06a9\u0631\u06cc\u067e\u062a \u0647\u0627:<\/p>\n

“scripts”: {
\n “test”: “jest”,
\n “test:watch”: “jest –watch”
\n}<\/p>\n

\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/p>\n

\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/p>\n

\u0622\u0632\u0645\u0648\u0646 \u0646\u0645\u0648\u0646\u0647 (__tests__\/UserService.test.ts)<\/p>\n

import { createUser, getUser } from ‘..\/services\/UserService’;
\nimport { pool } from ‘..\/db’;<\/p>\n

jest.mock(‘..\/db’, () => ({
\n pool: {
\n query: jest.fn(),
\n },
\n}));<\/p>\n

describe(‘UserService’, () => {
\n afterEach(() => {
\n jest.clearAllMocks();
\n });<\/p>\n

it(‘should create a user’, async () => {
\n (pool.query as jest.Mock).mockResolvedValueOnce({ rows: [{ id: 1 }] });<\/p>\n

const result = await createUser({ name: ‘Alice’, email: ‘alice@example.com’ })({ db: pool })();<\/p>\n

expect(result._tag).toBe(‘Right’);
\n if (result._tag === ‘Right’) {
\n expect(result.right).toBe(‘User created with ID: 1’);
\n }
\n });<\/p>\n

it(‘should return error if user not found’, async () => {
\n (pool.query as jest.Mock).mockResolvedValueOnce({ rows: [] });<\/p>\n

const result = await getUser(1)({ db: pool })();<\/p>\n

expect(result._tag).toBe(‘Left’);
\n if (result._tag === ‘Left’) {
\n expect(result.left.message).toBe(‘User not found’);
\n }
\n });<\/p>\n

it(‘should return error for invalid user data during creation’, async () => {
\n const invalidData = { name: 123, email: ‘invalid-email’ };
\n const result = await createUser(invalidData)({ db: pool })();
\n expect(result._tag).toBe(‘Left’);<\/p>\n

if (result._tag === ‘Left’) {
\n expect(result.left.message).toBe(‘Invalid user data provided’);
\n }
\n });
\n});<\/p>\n

\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/p>\n

\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/p>\n

\u0646\u062a\u06cc\u062c\u0647 \u06af\u06cc\u0631\u06cc<\/p>\n

\u0628\u0627 \u0627\u0639\u0645\u0627\u0644 \u0627\u0647\u0631\u0645 fp-ts\u060c Docker \u0648 \u0645\u062f\u06cc\u0631\u06cc\u062a \u062e\u0637\u0627\u06cc \u0642\u0648\u06cc\u060c \u0645\u0627 \u06cc\u06a9 \u0628\u0631\u0646\u0627\u0645\u0647 \u06a9\u0627\u0631\u0628\u0631\u062f\u06cc Node.js CRUD\u060c \u0645\u0642\u06cc\u0627\u0633 \u067e\u0630\u06cc\u0631 \u0648 \u0642\u0627\u0628\u0644 \u0646\u06af\u0647\u062f\u0627\u0631\u06cc \u0633\u0627\u062e\u062a\u06cc\u0645. \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0627\u0644\u06af\u0648\u0647\u0627\u06cc \u0628\u0631\u0646\u0627\u0645\u0647 \u0646\u0648\u06cc\u0633\u06cc \u06a9\u0627\u0631\u0628\u0631\u062f\u06cc \u06a9\u062f \u0634\u0645\u0627 \u0631\u0627 \u0642\u0627\u0628\u0644 \u067e\u06cc\u0634 \u0628\u06cc\u0646\u06cc \u062a\u0631 \u0648 \u0642\u0627\u0628\u0644 \u0627\u0639\u062a\u0645\u0627\u062f\u062a\u0631 \u0645\u06cc \u06a9\u0646\u062f\u060c \u0628\u0647 \u062e\u0635\u0648\u0635 \u062f\u0631 \u0647\u0646\u06af\u0627\u0645 \u0645\u062f\u06cc\u0631\u06cc\u062a \u06af\u0631\u062f\u0634 \u06a9\u0627\u0631 \u0646\u0627\u0647\u0645\u0632\u0645\u0627\u0646.<\/p>\n

\n
\n
\n

\u0641\u0647\u0631\u0633\u062a \u0645\u0637\u0627\u0644\u0628<\/p>\nToggle<\/span><\/path><\/svg><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n