@tetcoin/util/bn/toHex.spec.js

A collection of useful utilities for @tetcoin

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

var _bn = _interopRequireDefault(require("bn.js"));

var _ = require(".");

// Copyright 2017-2019 @polkadot/util authors & contributors
// This software may be modified and distributed under the terms
// of the Apache-2.0 license. See the LICENSE file for details.
describe('bnToHex', () => {
  it('converts null values to 0x00', () => {
    expect((0, _.bnToHex)(null)).toBe('0x00');
  });
  it('converts BN values to a prefixed hex representation', () => {
    expect((0, _.bnToHex)(new _bn.default(128))).toBe('0x80');
  });
  it('converts BN values to a prefixed hex representation (bitLength)', () => {
    expect((0, _.bnToHex)(new _bn.default(128), 16)).toBe('0x0080');
  });
  it('converts BN values to a prefixed hex representation (LE)', () => {
    expect((0, _.bnToHex)(new _bn.default(128), {
      bitLength: 16,
      isLe: true
    })).toBe('0x8000');
  });
  it('handles negative numbers', () => {
    expect((0, _.bnToHex)(new _bn.default(-1234), {
      isNegative: true
    })).toBe('0xfb2e');
  });
  it('handles negative numbers (with bitLength)', () => {
    expect((0, _.bnToHex)(new _bn.default(-1234), {
      bitLength: 32,
      isNegative: true
    })).toBe('0xfffffb2e');
  });
  it('handles backwards compatibility', () => {
    expect((0, _.bnToHex)(new _bn.default(1234), 32)).toBe((0, _.bnToHex)(new _bn.default(1234), {
      bitLength: 32
    }));
  });
});