auth/src/modules/authentication/tests/unit/update-username.usecase.spec.ts

import { classes } from '@automapper/classes';
import { AutomapperModule } from '@automapper/nestjs';
import { Test, TestingModule } from '@nestjs/testing';
import { UsernameRepository } from '../../adapters/secondaries/username.repository';
import { Username } from '../../domain/entities/username';
import { UpdateUsernameRequest } from '../../domain/dtos/update-username.request';
import { UpdateUsernameCommand } from '../../commands/update-username.command';
import { Type } from '../../domain/dtos/type.enum';
import { UpdateUsernameUseCase } from '../../domain/usecases/update-username.usecase';
import { CommandBus } from '@nestjs/cqrs';
import { UsernameProfile } from '../../mappers/username.profile';
import { BadRequestException } from '@nestjs/common';
import { Messager } from '../../adapters/secondaries/messager';

const existingUsername = {
  uuid: 'bb281075-1b98-4456-89d6-c643d3044a91',
  username: 'john.doe@email.com',
  type: Type.EMAIL,
};

const newUsernameRequest: UpdateUsernameRequest = new UpdateUsernameRequest();
newUsernameRequest.uuid = 'bb281075-1b98-4456-89d6-c643d3044a90';
newUsernameRequest.username = '+33611223344';
newUsernameRequest.type = Type.PHONE;

const updateUsernameRequest: UpdateUsernameRequest =
  new UpdateUsernameRequest();
updateUsernameRequest.uuid = 'bb281075-1b98-4456-89d6-c643d3044a91';
updateUsernameRequest.username = 'johnny.doe@email.com';
updateUsernameRequest.type = Type.EMAIL;

const unknownUsernameRequest: UpdateUsernameRequest =
  new UpdateUsernameRequest();
unknownUsernameRequest.uuid = 'bb281075-1b98-4456-89d6-c643d3044a92';
unknownUsernameRequest.username = 'unknown@email.com';
unknownUsernameRequest.type = Type.EMAIL;

const invalidUpdateUsernameRequest: UpdateUsernameRequest =
  new UpdateUsernameRequest();
invalidUpdateUsernameRequest.uuid = 'bb281075-1b98-4456-89d6-c643d3044a93';
invalidUpdateUsernameRequest.username = '';
invalidUpdateUsernameRequest.type = Type.EMAIL;

const newUsernameCommand: UpdateUsernameCommand = new UpdateUsernameCommand(
  newUsernameRequest,
);

const updateUsernameCommand: UpdateUsernameCommand = new UpdateUsernameCommand(
  updateUsernameRequest,
);

const invalidUpdateUsernameCommand: UpdateUsernameCommand =
  new UpdateUsernameCommand(invalidUpdateUsernameRequest);

const unknownUpdateUsernameCommand: UpdateUsernameCommand =
  new UpdateUsernameCommand(unknownUsernameRequest);

const mockUsernameRepository = {
  findOne: jest.fn().mockImplementation((request) => {
    if (request.uuid == 'bb281075-1b98-4456-89d6-c643d3044a90') {
      return Promise.resolve(null);
    }
    return Promise.resolve(existingUsername);
  }),
  updateWhere: jest.fn().mockImplementation((request) => {
    if (request.uuid_type.uuid == 'bb281075-1b98-4456-89d6-c643d3044a90') {
      return Promise.resolve(newUsernameRequest);
    }
    if (request.uuid_type.uuid == 'bb281075-1b98-4456-89d6-c643d3044a91') {
      return Promise.resolve(updateUsernameRequest);
    }
    if (request.uuid_type.uuid == 'bb281075-1b98-4456-89d6-c643d3044a92') {
      throw new Error('Error');
    }
    return Promise.resolve(invalidUpdateUsernameRequest);
  }),
};

const mockAddUsernameCommand = {
  execute: jest.fn().mockResolvedValue(newUsernameRequest),
};

const mockMessager = {
  publish: jest.fn().mockImplementation(),
};

describe('UpdateUsernameUseCase', () => {
  let updateUsernameUseCase: UpdateUsernameUseCase;

  beforeAll(async () => {
    const module: TestingModule = await Test.createTestingModule({
      imports: [AutomapperModule.forRoot({ strategyInitializer: classes() })],
      providers: [
        {
          provide: UsernameRepository,
          useValue: mockUsernameRepository,
        },
        {
          provide: CommandBus,
          useValue: mockAddUsernameCommand,
        },
        {
          provide: Messager,
          useValue: mockMessager,
        },
        UpdateUsernameUseCase,
        UsernameProfile,
      ],
    }).compile();

    updateUsernameUseCase = module.get<UpdateUsernameUseCase>(
      UpdateUsernameUseCase,
    );
  });

  it('should be defined', () => {
    expect(updateUsernameUseCase).toBeDefined();
  });

  describe('execute', () => {
    it('should create a new username', async () => {
      const newUsername: Username = await updateUsernameUseCase.execute(
        newUsernameCommand,
      );

      expect(newUsername.username).toBe(newUsernameRequest.username);
      expect(newUsername.type).toBe(newUsernameRequest.type);
    });

    it('should update a username for email type', async () => {
      const updatedUsername: Username = await updateUsernameUseCase.execute(
        updateUsernameCommand,
      );

      expect(updatedUsername.username).toBe(updateUsernameRequest.username);
      expect(updatedUsername.type).toBe(updateUsernameRequest.type);
    });

    it('should throw an error if username does not exist', async () => {
      await expect(
        updateUsernameUseCase.execute(unknownUpdateUsernameCommand),
      ).rejects.toBeInstanceOf(Error);
    });

    it('should throw an exception if username is invalid', async () => {
      await expect(
        updateUsernameUseCase.execute(invalidUpdateUsernameCommand),
      ).rejects.toBeInstanceOf(BadRequestException);
    });
  });
});