import * as mocha from 'mocha';
import * as chai from 'chai';
import {bigNumberValidation} from '../src/big-number-validation';
import {factories} from './lib/factories';
import {IndexedRelayTokens, RelayToken} from '0x-relay-types';
import {RelayUtil} from '../src/index';
import {AddressHelper} from './lib/address-helper';
import BigNumber from 'bignumber.js';

const expect = chai.expect;

let util: RelayUtil;
let indexedRelayTokens: IndexedRelayTokens;
const tokenAddresses: string[] = [];

/* tslint:disable:no-unused-expression */
describe('valueInETH', () => {
  before(async () => {
    indexedRelayTokens = factories.indexedRelayTokensFactory(10, tokenAddresses);
    util = new RelayUtil(indexedRelayTokens);
  });

  it('should return zero when the token is not available', () => {
    expect(util.valueInETH(500, AddressHelper.RandomAddress()).equals(new BigNumber('0')));
  });

  it('should return the rate from a token', () => {
    const token: RelayToken = util.getTokenByAddress(tokenAddresses[5]);
    expect(token.rate.WETH.times(new BigNumber('50')).equals(util.valueInETH(50, tokenAddresses[5])));
  });

  it('should return zero when the token has no rate', () => {
    const token: RelayToken = util.getTokenByAddress(tokenAddresses[8]);
    // Make sure the token does not have a 0 rate already
    expect(token.rate);
    expect(util.valueInETH(500, tokenAddresses[8]).greaterThan(new BigNumber('0')));
    token.rate = undefined;
    expect(util.valueInETH(500, tokenAddresses[8]).equals(new BigNumber('0')));
  });

});