import { expect } from 'chai';

import { Checksum } from '../../lib/domain/Checksum';

describe('Checksum', () => {
  describe('.empty()', () => {
    it('should return empty buffer', () => {
      expect(Checksum.empty().toBuffer()).to.deep.equal(Buffer.alloc(4));
    });
  });

  describe('.equals()', () => {
    it('should return false when not equal', () => {
      const a = Checksum.fromBuffer(Buffer.from('a'));
      const b = Checksum.fromBuffer(Buffer.from('b'));
      expect(a.equals(b)).to.equal(false);
    });

    it('should return true when equal', () => {
      const a = Checksum.fromBuffer(Buffer.from('a'));
      const b = Checksum.fromBuffer(Buffer.from('a'));
      expect(a.equals(b)).to.equal(true);
    });
  });

  describe('.toNumber()', () => {
    it('should return the number', () => {
      const sut = Checksum.fromBuffer(Buffer.from('a'));
      expect(sut.toNumber()).to.equal(3251651376);
    });
  });

  describe('.toBuffer()', () => {
    it('shoudl return expected buffer', () => {
      const sut = Checksum.fromBuffer(Buffer.from('a'));
      expect(sut.toBuffer().toString('hex')).to.deep.equal('c1d04330');
    });
  });

  describe('.toString()', () => {
    it('shoudl return expected buffer', () => {
      const sut = Checksum.fromBuffer(Buffer.from('a'));
      expect(sut.toString()).to.deep.equal('c1d04330');
    });
  });
});