graphql-server-test

import request from 'supertest'; import { ApolloServer } from '@apollo/server'; import { expressMiddleware } from '@apollo/server/express4'; import { ApolloServerPluginDrainHttpServer } from '@apollo/server/plugin/drainHttpServer'; import express from 'express'; import http from 'http'; import { createTestClient, gql } from 'graphql-server-test'; interface MyContext { user?: { id: string, name: string }; } const typeDefs = `#graphql type User { id: ID! name: String! } type Query { hello: String! me: User } type Mutation { createUser(name: String!): User! } `; const users: { id: string, name: string }[] = []; let nextId = 1; const resolvers = { Query: { hello: () => 'world', me: (_: any, __: any, context: MyContext) => context.user, }, Mutation: { createUser: (_: any, { name }: { name: string }) => { const newUser = { id: String(nextId++), name }; users.push(newUser); return newUser; }, }, }; async function startApolloServer() { const app = express(); const httpServer = http.createServer(app); const server = new ApolloServer<MyContext>({ typeDefs, resolvers, plugins: [ApolloServerPluginDrainHttpServer({ httpServer })], }); await server.start(); app.use('/graphql', express.json(), expressMiddleware(server, { context: async ({ req }) => { const token = req.headers.authorization || ''; // Mock user for testing purposes if (token === 'Bearer testuser') { return { user: { id: '123', name: 'Test User' } }; } return {}; }, })); return app; } describe('GraphQL Server Integration Tests', () => { let app: express.Application; let client: ReturnType<typeof createTestClient>; beforeAll(async () => { app = await startApolloServer(); client = createTestClient(request(app)); }); it('should return "world" for the hello query', async () => { const response = await client.query(gql`query { hello }`); expect(response.status).toBe(200); expect(response.body.data.hello).toBe('world'); }); it('should return the authenticated user', async () => { const response = await client.query( gql`query { me { id name } }`, { headers: { Authorization: 'Bearer testuser' } } ); expect(response.status).toBe(200); expect(response.body.data.me).toEqual({ id: '123', name: 'Test User' }); }); it('should create a new user via mutation', async () => { const response = await client.mutate( gql`mutation CreateUser($name: String!) { createUser(name: $name) { id name } }`, { variables: { name: 'New User' } } ); expect(response.status).toBe(200); expect(response.body.data.createUser).toHaveProperty('id'); expect(response.body.data.createUser.name).toBe('New User'); }); });