compensate.spec.ts

import { Result } from '@/src/result';

describe('Result', () => {
  describe('compensate', () => {
    test('takes the result from the second result, when previous result fails', () => {
      const sut = Result.failure('💥');

      expect(sut.compensate(() => Result.success('✅'))).toSucceedWith('✅');
    });

    test('takes the result from the first result, when it succeeds', () => {
      const sut = Result.success('✅');

      expect(sut.compensate(() => Result.failure('💥'))).toSucceedWith('✅');
    });

    test('takes the failure from the second result, when both fail', () => {
      const sut = Result.failure('💥');

      expect(sut.compensate(() => Result.failure('💥💥'))).toFailWith('💥💥');
    });

    test('calls projection with first result error', () => {
      const sut = Result.failure('💥');
      const projection = vi.fn(() => Result.success('✅'));

      sut.compensate(projection);
      expect(projection).toBeCalledWith('💥');
    });
  });
});