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-rw-r--r--packages/contracts/test/exchange/libs.ts155
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diff --git a/packages/contracts/test/exchange/libs.ts b/packages/contracts/test/exchange/libs.ts
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+import { ZeroEx } from '0x.js';
+import { BlockchainLifecycle } from '@0xproject/dev-utils';
+import { BigNumber } from '@0xproject/utils';
+import * as chai from 'chai';
+import ethUtil = require('ethereumjs-util');
+
+import { TestLibsContract } from '../../src/contract_wrappers/generated/test_libs';
+import { addressUtils } from '../../src/utils/address_utils';
+import { assetProxyUtils } from '../../src/utils/asset_proxy_utils';
+import { constants } from '../../src/utils/constants';
+import { OrderFactory } from '../../src/utils/order_factory';
+import { orderUtils } from '../../src/utils/order_utils';
+import { ContractName, SignedOrder } from '../../src/utils/types';
+import { chaiSetup } from '../utils/chai_setup';
+import { deployer } from '../utils/deployer';
+import { provider, web3Wrapper } from '../utils/web3_wrapper';
+
+chaiSetup.configure();
+const expect = chai.expect;
+
+const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
+
+describe('Exchange libs', () => {
+ let signedOrder: SignedOrder;
+ let orderFactory: OrderFactory;
+ let libs: TestLibsContract;
+
+ before(async () => {
+ const accounts = await web3Wrapper.getAvailableAddressesAsync();
+ const makerAddress = accounts[0];
+ const libsInstance = await deployer.deployAsync(ContractName.TestLibs);
+ libs = new TestLibsContract(libsInstance.abi, libsInstance.address, provider);
+ const zeroEx = new ZeroEx(provider, { networkId: constants.TESTRPC_NETWORK_ID });
+
+ const defaultOrderParams = {
+ ...constants.STATIC_ORDER_PARAMS,
+ exchangeAddress: libs.address,
+ makerAddress,
+ feeRecipientAddress: addressUtils.generatePseudoRandomAddress(),
+ makerAssetData: assetProxyUtils.encodeERC20ProxyData(addressUtils.generatePseudoRandomAddress()),
+ takerAssetData: assetProxyUtils.encodeERC20ProxyData(addressUtils.generatePseudoRandomAddress()),
+ };
+ const privateKey = constants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(makerAddress)];
+ orderFactory = new OrderFactory(privateKey, defaultOrderParams);
+ });
+
+ beforeEach(async () => {
+ await blockchainLifecycle.startAsync();
+ signedOrder = orderFactory.newSignedOrder();
+ });
+ afterEach(async () => {
+ await blockchainLifecycle.revertAsync();
+ });
+
+ describe('LibOrder', () => {
+ describe('getOrderHash', () => {
+ it('should output the correct orderHash', async () => {
+ const orderHashHex = await libs.publicGetOrderHash.callAsync(signedOrder);
+ expect(orderUtils.getOrderHashHex(signedOrder)).to.be.equal(orderHashHex);
+ });
+ });
+ });
+
+ describe('LibMath', () => {
+ describe('isRoundingError', () => {
+ it('should return false if there is a rounding error of 0.1%', async () => {
+ const numerator = new BigNumber(20);
+ const denominator = new BigNumber(999);
+ const target = new BigNumber(50);
+ // rounding error = ((20*50/999) - floor(20*50/999)) / (20*50/999) = 0.1%
+ const isRoundingError = await libs.publicIsRoundingError.callAsync(numerator, denominator, target);
+ expect(isRoundingError).to.be.false();
+ });
+
+ it('should return false if there is a rounding of 0.09%', async () => {
+ const numerator = new BigNumber(20);
+ const denominator = new BigNumber(9991);
+ const target = new BigNumber(500);
+ // rounding error = ((20*500/9991) - floor(20*500/9991)) / (20*500/9991) = 0.09%
+ const isRoundingError = await libs.publicIsRoundingError.callAsync(numerator, denominator, target);
+ expect(isRoundingError).to.be.false();
+ });
+
+ it('should return true if there is a rounding error of 0.11%', async () => {
+ const numerator = new BigNumber(20);
+ const denominator = new BigNumber(9989);
+ const target = new BigNumber(500);
+ // rounding error = ((20*500/9989) - floor(20*500/9989)) / (20*500/9989) = 0.011%
+ const isRoundingError = await libs.publicIsRoundingError.callAsync(numerator, denominator, target);
+ expect(isRoundingError).to.be.true();
+ });
+
+ it('should return true if there is a rounding error > 0.1%', async () => {
+ const numerator = new BigNumber(3);
+ const denominator = new BigNumber(7);
+ const target = new BigNumber(10);
+ // rounding error = ((3*10/7) - floor(3*10/7)) / (3*10/7) = 6.67%
+ const isRoundingError = await libs.publicIsRoundingError.callAsync(numerator, denominator, target);
+ expect(isRoundingError).to.be.true();
+ });
+
+ it('should return false when there is no rounding error', async () => {
+ const numerator = new BigNumber(1);
+ const denominator = new BigNumber(2);
+ const target = new BigNumber(10);
+
+ const isRoundingError = await libs.publicIsRoundingError.callAsync(numerator, denominator, target);
+ expect(isRoundingError).to.be.false();
+ });
+
+ it('should return false when there is rounding error <= 0.1%', async () => {
+ // randomly generated numbers
+ const numerator = new BigNumber(76564);
+ const denominator = new BigNumber(676373677);
+ const target = new BigNumber(105762562);
+ // rounding error = ((76564*105762562/676373677) - floor(76564*105762562/676373677)) /
+ // (76564*105762562/676373677) = 0.0007%
+ const isRoundingError = await libs.publicIsRoundingError.callAsync(numerator, denominator, target);
+ expect(isRoundingError).to.be.false();
+ });
+ });
+
+ describe('getPartialAmount', () => {
+ it('should return the numerator/denominator*target', async () => {
+ const numerator = new BigNumber(1);
+ const denominator = new BigNumber(2);
+ const target = new BigNumber(10);
+
+ const partialAmount = await libs.publicGetPartialAmount.callAsync(numerator, denominator, target);
+ const expectedPartialAmount = 5;
+ expect(partialAmount).to.be.bignumber.equal(expectedPartialAmount);
+ });
+
+ it('should round down', async () => {
+ const numerator = new BigNumber(2);
+ const denominator = new BigNumber(3);
+ const target = new BigNumber(10);
+
+ const partialAmount = await libs.publicGetPartialAmount.callAsync(numerator, denominator, target);
+ const expectedPartialAmount = 6;
+ expect(partialAmount).to.be.bignumber.equal(expectedPartialAmount);
+ });
+
+ it('should round .5 down', async () => {
+ const numerator = new BigNumber(1);
+ const denominator = new BigNumber(20);
+ const target = new BigNumber(10);
+
+ const partialAmount = await libs.publicGetPartialAmount.callAsync(numerator, denominator, target);
+ const expectedPartialAmount = 0;
+ expect(partialAmount).to.be.bignumber.equal(expectedPartialAmount);
+ });
+ });
+ });
+});