graphql-compose-mongoose/mjs/resolvers/__tests__/pagination-test.mjs

Plugin for `graphql-compose` which derive a graphql types from a mongoose model.

import { Resolver, schemaComposer } from 'graphql-compose';
import { UserModel } from '../../__mocks__/userModel';
import pagination from '../pagination';
import findMany from '../findMany';
import count from '../count';
import { convertModelToGraphQL } from '../../fieldsConverter';
beforeAll(() => UserModel.base.connect());
afterAll(() => UserModel.base.disconnect());
describe('pagination() ->', () => {
  let UserTC;
  beforeEach(() => {
    schemaComposer.clear();
    UserTC = convertModelToGraphQL(UserModel, 'User', schemaComposer);
    UserTC.setResolver('findMany', findMany(UserModel, UserTC));
    UserTC.setResolver('count', count(UserModel, UserTC));
  });
  let user1;
  let user2;
  beforeEach(async () => {
    await UserModel.deleteMany({});
    user1 = new UserModel({
      name: 'userName1',
      skills: ['js', 'ruby', 'php', 'python'],
      gender: 'male',
      relocation: true
    });
    user2 = new UserModel({
      name: 'userName2',
      skills: ['go', 'erlang'],
      gender: 'female',
      relocation: false
    });
    await user1.save();
    await user2.save();
  });
  it('should return Resolver object', () => {
    const resolver = pagination(UserModel, UserTC);
    expect(resolver).toBeInstanceOf(Resolver);
  });
  it('Resolver object should have `filter` arg', () => {
    const resolver = pagination(UserModel, UserTC);
    if (!resolver) throw new Error('Pagination resolver is undefined');
    expect(resolver.hasArg('filter')).toBe(true);
  });
  it('Resolver object should have `page` arg', () => {
    const resolver = pagination(UserModel, UserTC);
    if (!resolver) throw new Error('Pagination resolver is undefined');
    expect(resolver.hasArg('page')).toBe(true);
  });
  it('Resolver object should have `perPage` arg', () => {
    const resolver = pagination(UserModel, UserTC);
    if (!resolver) throw new Error('Pagination resolver is undefined');
    expect(resolver.hasArg('perPage')).toBe(true);
    expect(resolver.getArgConfig('perPage').defaultValue).toBe(20);
  });
  it('Resolver object should have `perPage` arg with custom default value', () => {
    const resolver = pagination(UserModel, UserTC, {
      perPage: 33
    });
    if (!resolver) throw new Error('Pagination resolver is undefined');
    expect(resolver.hasArg('perPage')).toBe(true);
    expect(resolver.getArgConfig('perPage').defaultValue).toBe(33);
  });
  it('Resolver object should have `sort` arg', () => {
    const resolver = pagination(UserModel, UserTC);
    if (!resolver) throw new Error('Pagination resolver is undefined');
    expect(resolver.hasArg('sort')).toBe(true);
  });
  describe('Resolver.resolve():Promise', () => {
    it('should be fulfilled Promise', async () => {
      const resolver = pagination(UserModel, UserTC);
      if (!resolver) throw new Error('Pagination resolver is undefined');
      const result = resolver.resolve({
        args: {
          page: 1,
          perPage: 20
        }
      });
      await expect(result).resolves.toBeDefined();
    });
    it('should return array of documents in `items`', async () => {
      const resolver = pagination(UserModel, UserTC);
      if (!resolver) throw new Error('Pagination resolver is undefined');
      const result = await resolver.resolve({
        args: {
          page: 1,
          perPage: 20
        }
      });
      expect(result.items).toBeInstanceOf(Array);
      expect(result.items).toHaveLength(2);
      expect(result.items.map(d => d.name)).toEqual(expect.arrayContaining([user1.name, user2.name]));
    });
    it('should limit records', async () => {
      const resolver = pagination(UserModel, UserTC);
      if (!resolver) throw new Error('Pagination resolver is undefined');
      const result = await resolver.resolve({
        args: {
          page: 1,
          perPage: 1
        }
      });
      expect(result.items).toBeInstanceOf(Array);
      expect(result.items).toHaveLength(1);
    });
    it('should skip records', async () => {
      const resolver = pagination(UserModel, UserTC);
      if (!resolver) throw new Error('Pagination resolver is undefined');
      const result = await resolver.resolve({
        args: {
          page: 999,
          perPage: 10
        }
      });
      expect(result.items).toBeInstanceOf(Array);
      expect(result.items).toHaveLength(0);
    });
    it('should sort records', async () => {
      const resolver = pagination(UserModel, UserTC);
      if (!resolver) throw new Error('Pagination resolver is undefined');
      const result1 = await resolver.resolve({
        args: {
          sort: {
            _id: 1
          },
          page: 1,
          perPage: 20
        }
      });
      const result2 = await resolver.resolve({
        args: {
          sort: {
            _id: -1
          },
          page: 1,
          perPage: 20
        }
      });
      expect(`${result1.items[0]._id}`).not.toBe(`${result2.items[0]._id}`);
    });
    it('should return mongoose documents', async () => {
      const resolver = pagination(UserModel, UserTC);
      if (!resolver) throw new Error('Pagination resolver is undefined');
      const result = await resolver.resolve({
        args: {
          page: 1,
          perPage: 20
        }
      });
      expect(result.items[0]).toBeInstanceOf(UserModel);
      expect(result.items[1]).toBeInstanceOf(UserModel);
    });
  });
});