nixi-api/tests/account/AccountService.test.ts

import { describe, it, expect, jest, beforeEach } from "bun:test";
import {
  AccountNotFoundError,
  AccountAlreadyExistsError,
  BadPasswordError,
} from "../../src/domain/account/errors/AccountErrors";
import AccountService from "../../src/domain/account/service/AccountService";
import { AccountEntity } from "../../src/domain/account/entity/AccountEntity";

describe("AccountService", () => {
  let accountService: AccountService;
  let mockAccountRepository: {
    findByUsername: ReturnType<typeof jest.fn>;
    insert: ReturnType<typeof jest.fn>;
    findById: ReturnType<typeof jest.fn>;
  };

  beforeEach(() => {
    mockAccountRepository = {
      findByUsername: jest.fn(() => Promise.resolve(null)),
      insert: jest.fn(() => Promise.resolve("123")),
      findById: jest.fn(() => Promise.resolve(null)),
    };
    accountService = new AccountService(mockAccountRepository as any);
  });

  describe("createAccount", () => {
    it("should create a new account successfully", async () => {
      const username = "testusername";
      const password = "password123";

      mockAccountRepository.findByUsername.mockImplementation(() =>
        Promise.resolve(null),
      );

      mockAccountRepository.findById.mockImplementation(() =>
        Promise.resolve(
          new AccountEntity(
            123,
            username,
            "hashedpassword",
            1,
            new Date(),
            new Date(),
          ),
        ),
      );

      mockAccountRepository.insert.mockImplementation(() =>
        Promise.resolve(123),
      );

      const result = await accountService.register(username, password);

      expect(result).toBeInstanceOf(AccountEntity);
      expect(result.username).toBe(username);
      expect(mockAccountRepository.findByUsername).toHaveBeenCalledWith(
        username,
      );
    });

    it("should throw error if account already exists", async () => {
      const username = "testusername";
      const password = "password123";
      const existingAccount = await AccountEntity.create(username, password);

      mockAccountRepository.findByUsername.mockImplementation(() =>
        Promise.resolve(existingAccount),
      );

      expect(accountService.register(username, password)).rejects.toThrow(
        AccountAlreadyExistsError,
      );
    });
  });

  describe("login", () => {
    it("should login successfully with correct credentials", async () => {
      const username = "testaccount";
      const password = "password123";

      const createAccount = await AccountEntity.create(username, password);
      const account = new AccountEntity(
        1,
        createAccount.username,
        createAccount.hashedPassword,
        createAccount.roleId,
        new Date(),
        new Date(),
      );

      mockAccountRepository.findByUsername.mockImplementation(() =>
        Promise.resolve(account),
      );

      const result = await accountService.login(username, password);

      expect({ username: result.username, roleId: result.roleId }).toEqual({
        username: account.username,
        roleId: account.roleId,
      });

      expect(mockAccountRepository.findByUsername).toHaveBeenCalledWith(
        username,
      );
    });

    it("should throw error if account not found", async () => {
      const username = "testaccount";
      const password = "password123";

      mockAccountRepository.findByUsername.mockImplementation(() =>
        Promise.resolve(null),
      );

      expect(accountService.login(username, password)).rejects.toThrow(
        AccountNotFoundError,
      );
    });

    it("should throw error if password is incorrect", async () => {
      const username = "testaccount";
      const password = "password123";
      const wrongPassword = "wrongpassword";

      const createAccount = await AccountEntity.create(username, password);
      const account = new AccountEntity(
        1,
        createAccount.username,
        createAccount.hashedPassword,
        createAccount.roleId,
        new Date(),
        new Date(),
      );

      mockAccountRepository.findByUsername.mockImplementation(() =>
        Promise.resolve(account),
      );

      expect(accountService.login(username, wrongPassword)).rejects.toThrow(
        BadPasswordError,
      );
    });
  });
});