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Текущая директория: /opt/BitGoJS/node_modules/js-xdr/test/unit

Просмотр файла: unsigned-hyper_test.js

let UnsignedHyper = XDR.UnsignedHyper;
import { Cursor } from '../../src/cursor';
import { cursorToArray } from '../support/io-helpers';

describe('UnsignedHyper.read', function() {
  it('decodes correctly', function() {
    expect(read([0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00])).to.eql(
      UnsignedHyper.fromString('0')
    );
    expect(read([0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01])).to.eql(
      UnsignedHyper.fromString('1')
    );
    expect(read([0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff])).to.eql(
      UnsignedHyper.MAX_VALUE
    );
  });

  function read(bytes) {
    let io = new Cursor(bytes);
    return UnsignedHyper.read(io);
  }
});

describe('UnsignedHyper.write', function() {
  it('encodes correctly', function() {
    expect(write(UnsignedHyper.fromString('0'))).to.eql([
      0x00,
      0x00,
      0x00,
      0x00,
      0x00,
      0x00,
      0x00,
      0x00
    ]);
    expect(write(UnsignedHyper.fromString('1'))).to.eql([
      0x00,
      0x00,
      0x00,
      0x00,
      0x00,
      0x00,
      0x00,
      0x01
    ]);
    expect(write(UnsignedHyper.MAX_VALUE)).to.eql([
      0xff,
      0xff,
      0xff,
      0xff,
      0xff,
      0xff,
      0xff,
      0xff
    ]);
  });

  function write(value) {
    let io = new Cursor(8);
    UnsignedHyper.write(value, io);
    return cursorToArray(io);
  }
});

describe('UnsignedHyper.isValid', function() {
  it('returns true for UnsignedHyper instances', function() {
    expect(UnsignedHyper.isValid(UnsignedHyper.fromString('1'))).to.be.true;
    expect(UnsignedHyper.isValid(UnsignedHyper.MIN_VALUE)).to.be.true;
    expect(UnsignedHyper.isValid(UnsignedHyper.MAX_VALUE)).to.be.true;
  });

  it('returns false for non UnsignedHypers', function() {
    expect(UnsignedHyper.isValid(null)).to.be.false;
    expect(UnsignedHyper.isValid(undefined)).to.be.false;
    expect(UnsignedHyper.isValid([])).to.be.false;
    expect(UnsignedHyper.isValid({})).to.be.false;
    expect(UnsignedHyper.isValid(1)).to.be.false;
    expect(UnsignedHyper.isValid(true)).to.be.false;
  });
});

describe('UnsignedHyper.fromString', function() {
  it('works for positive numbers', function() {
    expect(UnsignedHyper.fromString('1059').toString()).to.eql('1059');
  });

  it('fails for negative numbers', function() {
    expect(() => UnsignedHyper.fromString('-1059')).to.throw(/Invalid/);
  });

  it('fails when providing a string with a decimal place', function() {
    expect(() => UnsignedHyper.fromString('105946095601.5')).to.throw(
      /Invalid/
    );
  });
});

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