gql.spec.ts

/* eslint-disable @typescript-eslint/no-unsafe-assignment */
import type { INestApplication } from '@nestjs/common';
import { Test } from '@nestjs/testing';
import type { Express } from 'express';
import supertest from 'supertest';

import { AppModule } from '../../src/app.module';

// https://www.apollographql.com/docs/apollo-server/testing/testing/
// As another alternative, can use apollo-server-testing instead of supertest

const gql = String.raw; // for highlighting
let app: INestApplication<Express> | undefined;
let request: supertest.Agent;
let idx: number;

beforeAll(async () => {
  const moduleRef = await Test.createTestingModule({
    imports: [AppModule],
  }).compile();

  app = moduleRef.createNestApplication();
  await app.init();

  request = supertest(app.getHttpServer());
});

test('User', async () => {
  const { status, body: login } = await request.post('/jwt/login').send({ username: 'foobar', password: 'crypto' });

  expect([200, 201]).toContain(status);
  expect(login).toHaveProperty('access_token');

  const { body } = await request
    .post('/graphql')
    .set('Authorization', `Bearer ${login.access_token}`)
    .send({
      query: gql`
        query Payload {
          user {
            username
          }
        }
      `,
    })
    .expect(200);

  expect(body).toHaveProperty('data.user.username', 'foobar');
});

test('Write', async () => {
  const { body } = await request
    .post('/graphql')
    .send({
      query: gql`
        mutation Write($data: SimpleInput!) {
          create(simpleData: $data) {
            id
            title
            content
            tags
          }
        }
      `,
      variables: {
        data: {
          title: 'foo',
          content: 'bar',
          tags: 'test',
        },
      },
    })
    .expect(200);

  expect(body).toHaveProperty('data.create.id');

  idx = body.data.create.id;
});

test('Read', async () => {
  const { body } = await request
    .post('/graphql')
    .send({
      query: gql`
        query Read($id: ID!) {
          read(id: $id) {
            title
            createdAt
          }
        }
      `,
      variables: {
        id: idx,
      },
    })
    .expect(200);

  expect(body).toHaveProperty('data.read.title', 'foo');
});

test('Find', async () => {
  const { body } = await request
    .post('/graphql')
    .send({
      query: gql`
        query Find($title: String!, $content: String) {
          find(title: $title, content: $content) {
            id
            title
            content
            tags
            createdAt
          }
        }
      `,
      variables: {
        title: 'foo',
      },
    })
    .expect(200);

  expect(body).toHaveProperty('data.find');
  expect(body.data.find).toContainEqual(
    expect.objectContaining({
      title: expect.any(String),
      createdAt: expect.any(String),
    }),
  );
});

test('Remove', async () => {
  const { body } = await request
    .post('/graphql')
    .send({
      query: gql`
        mutation Remove($id: ID!) {
          remove(id: $id)
        }
      `,
      variables: {
        id: idx,
      },
    })
    .expect(200);

  expect(body).toHaveProperty('data.remove', true);
});

afterAll(async () => {
  await app?.close();
});