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-rw-r--r--test/ether_token_wrapper_test.ts106
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+import 'mocha';
+import * as chai from 'chai';
+import {chaiSetup} from './utils/chai_setup';
+import * as Web3 from 'web3';
+import * as BigNumber from 'bignumber.js';
+import promisify = require('es6-promisify');
+import {web3Factory} from './utils/web3_factory';
+import {ZeroEx, ZeroExError, Token} from '../src';
+import {BlockchainLifecycle} from './utils/blockchain_lifecycle';
+
+chaiSetup.configure();
+const expect = chai.expect;
+const blockchainLifecycle = new BlockchainLifecycle();
+
+// Since the address depositing/withdrawing ETH/WETH also needs to pay gas costs for the transaction,
+// a small amount of ETH will be used to pay this gas cost. We therefore check that the difference between
+// the expected balance and actual balance (given the amount of ETH deposited), only deviates by the amount
+// required to pay gas costs.
+const MAX_REASONABLE_GAS_COST_IN_WEI = 62237;
+
+describe('EtherTokenWrapper', () => {
+ let web3: Web3;
+ let zeroEx: ZeroEx;
+ let userAddresses: string[];
+ let addressWithETH: string;
+ let wethContractAddress: string;
+ let depositWeiAmount: BigNumber.BigNumber;
+ let decimalPlaces: number;
+ before(async () => {
+ web3 = web3Factory.create();
+ zeroEx = new ZeroEx(web3.currentProvider);
+ userAddresses = await promisify(web3.eth.getAccounts)();
+ addressWithETH = userAddresses[0];
+ wethContractAddress = await zeroEx.etherToken.getContractAddressAsync();
+ depositWeiAmount = (zeroEx as any)._web3Wrapper.toWei(new BigNumber(5));
+ decimalPlaces = 7;
+ });
+ beforeEach(async () => {
+ await blockchainLifecycle.startAsync();
+ });
+ afterEach(async () => {
+ await blockchainLifecycle.revertAsync();
+ });
+ describe('#depositAsync', () => {
+ it('should successfully deposit ETH and issue Wrapped ETH tokens', async () => {
+ const preETHBalance = await (zeroEx as any)._web3Wrapper.getBalanceInWeiAsync(addressWithETH);
+ const preWETHBalance = await zeroEx.token.getBalanceAsync(wethContractAddress, addressWithETH);
+ expect(preETHBalance).to.be.bignumber.gt(0);
+ expect(preWETHBalance).to.be.bignumber.equal(0);
+
+ await zeroEx.etherToken.depositAsync(depositWeiAmount, addressWithETH);
+
+ const postETHBalanceInWei = await (zeroEx as any)._web3Wrapper.getBalanceInWeiAsync(addressWithETH);
+ const postWETHBalanceInBaseUnits = await zeroEx.token.getBalanceAsync(wethContractAddress, addressWithETH);
+
+ expect(postWETHBalanceInBaseUnits).to.be.bignumber.equal(depositWeiAmount);
+ const remainingETHInWei = preETHBalance.minus(depositWeiAmount);
+ const gasCost = remainingETHInWei.minus(postETHBalanceInWei);
+ expect(gasCost).to.be.bignumber.lte(MAX_REASONABLE_GAS_COST_IN_WEI);
+ });
+ it('should throw if user has insufficient ETH balance for deposit', async () => {
+ const preETHBalance = await (zeroEx as any)._web3Wrapper.getBalanceInWeiAsync(addressWithETH);
+
+ const extraETHBalance = (zeroEx as any)._web3Wrapper.toWei(5, 'ether');
+ const overETHBalanceinWei = preETHBalance.add(extraETHBalance);
+
+ return expect(
+ zeroEx.etherToken.depositAsync(overETHBalanceinWei, addressWithETH),
+ ).to.be.rejectedWith(ZeroExError.INSUFFICIENT_ETH_BALANCE_FOR_DEPOSIT);
+ });
+ });
+ describe('#withdrawAsync', () => {
+ it('should successfully withdraw ETH in return for Wrapped ETH tokens', async () => {
+ const ETHBalanceInWei = await (zeroEx as any)._web3Wrapper.getBalanceInWeiAsync(addressWithETH);
+
+ await zeroEx.etherToken.depositAsync(depositWeiAmount, addressWithETH);
+
+ const expectedPreETHBalance = ETHBalanceInWei.minus(depositWeiAmount);
+ const preETHBalance = await (zeroEx as any)._web3Wrapper.getBalanceInWeiAsync(addressWithETH);
+ const preWETHBalance = await zeroEx.token.getBalanceAsync(wethContractAddress, addressWithETH);
+ let gasCost = expectedPreETHBalance.minus(preETHBalance);
+ expect(gasCost).to.be.bignumber.lte(MAX_REASONABLE_GAS_COST_IN_WEI);
+ expect(preWETHBalance).to.be.bignumber.equal(depositWeiAmount);
+
+ await zeroEx.etherToken.withdrawAsync(depositWeiAmount, addressWithETH);
+
+ const postETHBalance = await (zeroEx as any)._web3Wrapper.getBalanceInWeiAsync(addressWithETH);
+ const postWETHBalanceInBaseUnits = await zeroEx.token.getBalanceAsync(wethContractAddress, addressWithETH);
+
+ expect(postWETHBalanceInBaseUnits).to.be.bignumber.equal(0);
+ const expectedETHBalance = preETHBalance.add(depositWeiAmount).round(decimalPlaces);
+ gasCost = expectedETHBalance.minus(postETHBalance);
+ expect(gasCost).to.be.bignumber.lte(MAX_REASONABLE_GAS_COST_IN_WEI);
+ });
+ it('should throw if user has insufficient WETH balance for withdrawl', async () => {
+ const preWETHBalance = await zeroEx.token.getBalanceAsync(wethContractAddress, addressWithETH);
+ expect(preWETHBalance).to.be.bignumber.equal(0);
+
+ const overWETHBalance = preWETHBalance.add(999999999);
+
+ return expect(
+ zeroEx.etherToken.withdrawAsync(overWETHBalance, addressWithETH),
+ ).to.be.rejectedWith(ZeroExError.INSUFFICIENT_WETH_BALANCE_FOR_WITHDRAWAL);
+ });
+ });
+});