import { DeletePrizePresenter } from './DeletePrizePresenter';
import { DeletePrizeResultDTO } from '../dtos/DeletePrizeDTO';

describe('DeletePrizePresenter', () => {
  let presenter: DeletePrizePresenter;

  beforeEach(() => {
    presenter = new DeletePrizePresenter();
  });

  describe('present', () => {
    it('should store the result', () => {
      const result: DeletePrizeResultDTO = {
        success: true,
      };

      presenter.present(result);

      expect(presenter.getResponseModel()).toEqual(result);
    });

    it('should overwrite previous result', () => {
      const firstResult: DeletePrizeResultDTO = {
        success: true,
      };

      const secondResult: DeletePrizeResultDTO = {
        success: false,
      };

      presenter.present(firstResult);
      presenter.present(secondResult);

      expect(presenter.getResponseModel()).toEqual(secondResult);
    });
  });

  describe('getResponseModel', () => {
    it('should return null when not presented', () => {
      expect(presenter.getResponseModel()).toBeNull();
    });

    it('should return the result after present()', () => {
      const result: DeletePrizeResultDTO = {
        success: true,
      };

      presenter.present(result);

      expect(presenter.getResponseModel()).toEqual(result);
    });
  });

  describe('reset', () => {
    it('should clear the result', () => {
      const result: DeletePrizeResultDTO = {
        success: true,
      };

      presenter.present(result);
      presenter.reset();

      expect(presenter.getResponseModel()).toBeNull();
    });

    it('should allow presenting again after reset', () => {
      const firstResult: DeletePrizeResultDTO = {
        success: true,
      };

      const secondResult: DeletePrizeResultDTO = {
        success: false,
      };

      presenter.present(firstResult);
      presenter.reset();
      presenter.present(secondResult);

      expect(presenter.getResponseModel()).toEqual(secondResult);
    });
  });

  describe('viewModel', () => {
    it('should return the result', () => {
      const result: DeletePrizeResultDTO = {
        success: true,
      };

      presenter.present(result);

      expect(presenter.viewModel).toEqual(result);
    });

    it('should throw error when accessed before present()', () => {
      expect(() => presenter.viewModel).toThrow('Presenter not presented');
    });

    it('should throw error after reset', () => {
      const result: DeletePrizeResultDTO = {
        success: true,
      };

      presenter.present(result);
      presenter.reset();

      expect(() => presenter.viewModel).toThrow('Presenter not presented');
    });
  });
});
