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import {ZeroEx, ZeroExError} from '0x.js';
import {BigNumber} from 'bignumber.js';
import * as chai from 'chai';
import promisify = require('es6-promisify');
import Web3 = require('web3');
import {Artifacts} from '../../util/artifacts';
import {chaiSetup} from './utils/chai_setup';
const {EtherTokenV2} = new Artifacts(artifacts);
chaiSetup.configure();
const expect = chai.expect;
// In order to benefit from type-safety, we re-assign the global web3 instance injected by Truffle
// with type `any` to a variable of type `Web3`.
const web3: Web3 = (global as any).web3;
contract('EtherTokenV2', (accounts: string[]) => {
const account = accounts[0];
const gasPrice = ZeroEx.toBaseUnitAmount(new BigNumber(20), 9);
let zeroEx: ZeroEx;
let etherTokenAddress: string;
beforeEach(async () => {
const etherToken = await EtherTokenV2.new();
etherTokenAddress = etherToken.address;
zeroEx = new ZeroEx(web3.currentProvider, {
gasPrice,
etherTokenContractAddress: etherTokenAddress,
});
});
const sendTransactionAsync = promisify(web3.eth.sendTransaction);
const getEthBalanceAsync = async (owner: string) => {
const balanceStr = await promisify(web3.eth.getBalance)(owner);
const balance = new BigNumber(balanceStr);
return balance;
};
describe('deposit', () => {
it('should throw if caller attempts to deposit more Ether than caller balance', async () => {
const initEthBalance = await getEthBalanceAsync(account);
const ethToDeposit = initEthBalance.plus(1);
return expect(zeroEx.etherToken.depositAsync(ethToDeposit, account))
.to.be.rejectedWith(ZeroExError.InsufficientEthBalanceForDeposit);
});
it('should convert deposited Ether to wrapped Ether tokens', async () => {
const initEthBalance = await getEthBalanceAsync(account);
const initEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
const ethToDeposit = new BigNumber(web3.toWei(1, 'ether'));
const txHash = await zeroEx.etherToken.depositAsync(ethToDeposit, account);
const receipt = await zeroEx.awaitTransactionMinedAsync(txHash);
const ethSpentOnGas = gasPrice.times(receipt.gasUsed);
const finalEthBalance = await getEthBalanceAsync(account);
const finalEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
expect(finalEthBalance).to.be.bignumber.equal(initEthBalance.minus(ethToDeposit.plus(ethSpentOnGas)));
expect(finalEthTokenBalance).to.be.bignumber.equal(initEthTokenBalance.plus(ethToDeposit));
});
it('should log 1 event with correct arguments', async () => {
const ethToDeposit = new BigNumber(web3.toWei(1, 'ether'));
const txHash = await zeroEx.etherToken.depositAsync(ethToDeposit, account);
const receipt = await zeroEx.awaitTransactionMinedAsync(txHash);
const logs = receipt.logs;
expect(logs.length).to.equal(1);
const expectedFrom = ZeroEx.NULL_ADDRESS;
const expectedTo = account;
const expectedValue = ethToDeposit;
const logArgs = logs[0].args;
expect(logArgs._from).to.equal(expectedFrom);
expect(logArgs._to).to.equal(expectedTo);
expect(logArgs._value).to.be.bignumber.equal(ethToDeposit);
});
});
describe('withdraw', () => {
beforeEach(async () => {
const ethToDeposit = new BigNumber(web3.toWei(1, 'ether'));
await zeroEx.etherToken.depositAsync(ethToDeposit, account);
});
it('should throw if caller attempts to withdraw greater than caller balance', async () => {
const initEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
const ethTokensToWithdraw = initEthTokenBalance.plus(1);
return expect(zeroEx.etherToken.withdrawAsync(ethTokensToWithdraw, account))
.to.be.rejectedWith(ZeroExError.InsufficientWEthBalanceForWithdrawal);
});
it('should convert ether tokens to ether with sufficient balance', async () => {
const initEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
const initEthBalance = await getEthBalanceAsync(account);
const ethTokensToWithdraw = initEthTokenBalance;
expect(ethTokensToWithdraw).to.not.be.bignumber.equal(0);
const txHash = await zeroEx.etherToken.withdrawAsync(ethTokensToWithdraw, account);
const receipt = await zeroEx.awaitTransactionMinedAsync(txHash);
const ethSpentOnGas = gasPrice.times(receipt.gasUsed);
const finalEthBalance = await getEthBalanceAsync(account);
const finalEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
expect(finalEthBalance).to.be.bignumber
.equal(initEthBalance.plus(ethTokensToWithdraw.minus(ethSpentOnGas)));
expect(finalEthTokenBalance).to.be.bignumber.equal(initEthTokenBalance.minus(ethTokensToWithdraw));
});
it('should log 1 event with correct arguments', async () => {
const initEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
const initEthBalance = await getEthBalanceAsync(account);
const ethTokensToWithdraw = initEthTokenBalance;
expect(ethTokensToWithdraw).to.not.be.bignumber.equal(0);
const txHash = await zeroEx.etherToken.withdrawAsync(ethTokensToWithdraw, account);
const receipt = await zeroEx.awaitTransactionMinedAsync(txHash);
const logs = receipt.logs;
expect(logs.length).to.equal(1);
const expectedFrom = account;
const expectedTo = ZeroEx.NULL_ADDRESS;
const expectedValue = ethTokensToWithdraw;
const logArgs = logs[0].args;
expect(logArgs._from).to.equal(expectedFrom);
expect(logArgs._to).to.equal(expectedTo);
expect(logArgs._value).to.be.bignumber.equal(ethTokensToWithdraw);
});
});
describe('fallback', () => {
it('should convert sent ether to ether tokens', async () => {
const initEthBalance = await getEthBalanceAsync(account);
const initEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
const ethToDeposit = ZeroEx.toBaseUnitAmount(new BigNumber(1), 18);
const txHash = await sendTransactionAsync({
from: account,
to: etherTokenAddress,
value: ethToDeposit,
gasPrice,
});
const receipt = await zeroEx.awaitTransactionMinedAsync(txHash);
const ethSpentOnGas = gasPrice.times(receipt.gasUsed);
const finalEthBalance = await getEthBalanceAsync(account);
const finalEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
expect(finalEthBalance).to.be.bignumber.equal(initEthBalance.minus(ethToDeposit.plus(ethSpentOnGas)));
expect(finalEthTokenBalance).to.be.bignumber.equal(initEthTokenBalance.plus(ethToDeposit));
});
});
});
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