1 files changed, 87 insertions, 0 deletions
diff --git a/packages/0x.js/test/exchange_transfer_simulator_test.ts b/packages/0x.js/test/exchange_transfer_simulator_test.ts
new file mode 100644
index 000000000..99cb7fb4f
--- /dev/null
+++ b/packages/0x.js/test/exchange_transfer_simulator_test.ts
@@ -0,0 +1,87 @@
+import * as chai from 'chai';
+import BigNumber from 'bignumber.js';
+import {chaiSetup} from './utils/chai_setup';
+import {web3Factory} from './utils/web3_factory';
+import {ZeroEx, ExchangeContractErrs, Token} from '../src';
+import {TradeSide, TransferType} from '../src/types';
+import {BlockchainLifecycle} from './utils/blockchain_lifecycle';
+import {ExchangeTransferSimulator} from '../src/utils/exchange_transfer_simulator';
+
+chaiSetup.configure();
+const expect = chai.expect;
+const blockchainLifecycle = new BlockchainLifecycle();
+
+describe('ExchangeTransferSimulator', () => {
+    const web3 = web3Factory.create();
+    const zeroEx = new ZeroEx(web3.currentProvider);
+    const transferAmount = new BigNumber(5);
+    let userAddresses: string[];
+    let tokens: Token[];
+    let coinbase: string;
+    let sender: string;
+    let recipient: string;
+    let exampleTokenAddress: string;
+    let exchangeTransferSimulator: ExchangeTransferSimulator;
+    let txHash: string;
+    before(async () => {
+        userAddresses = await zeroEx.getAvailableAddressesAsync();
+        [coinbase, sender, recipient] = userAddresses;
+        tokens = await zeroEx.tokenRegistry.getTokensAsync();
+        exampleTokenAddress = tokens[0].address;
+    });
+    beforeEach(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    afterEach(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+    describe('#transferFromAsync', () => {
+        beforeEach(() => {
+            exchangeTransferSimulator = new ExchangeTransferSimulator(zeroEx.token);
+        });
+        it('throws if the user doesn\'t have enough allowance', async () => {
+            return expect(exchangeTransferSimulator.transferFromAsync(
+                exampleTokenAddress, sender, recipient, transferAmount, TradeSide.Taker, TransferType.Trade,
+            )).to.be.rejectedWith(ExchangeContractErrs.InsufficientTakerAllowance);
+        });
+        it('throws if the user doesn\'t have enough balance', async () => {
+            txHash = await zeroEx.token.setProxyAllowanceAsync(exampleTokenAddress, sender, transferAmount);
+            await zeroEx.awaitTransactionMinedAsync(txHash);
+            return expect(exchangeTransferSimulator.transferFromAsync(
+                exampleTokenAddress, sender, recipient, transferAmount, TradeSide.Maker, TransferType.Trade,
+            )).to.be.rejectedWith(ExchangeContractErrs.InsufficientMakerBalance);
+        });
+        it('updates balances and proxyAllowance after transfer', async () => {
+            txHash = await zeroEx.token.transferAsync(exampleTokenAddress, coinbase, sender, transferAmount);
+            await zeroEx.awaitTransactionMinedAsync(txHash);
+            txHash = await zeroEx.token.setProxyAllowanceAsync(exampleTokenAddress, sender, transferAmount);
+            await zeroEx.awaitTransactionMinedAsync(txHash);
+            await exchangeTransferSimulator.transferFromAsync(
+                exampleTokenAddress, sender, recipient, transferAmount, TradeSide.Taker, TransferType.Trade,
+            );
+            const store = (exchangeTransferSimulator as any).store;
+            const senderBalance = await store.getBalanceAsync(exampleTokenAddress, sender);
+            const recipientBalance = await store.getBalanceAsync(exampleTokenAddress, recipient);
+            const senderProxyAllowance = await store.getProxyAllowanceAsync(exampleTokenAddress, sender);
+            expect(senderBalance).to.be.bignumber.equal(0);
+            expect(recipientBalance).to.be.bignumber.equal(transferAmount);
+            expect(senderProxyAllowance).to.be.bignumber.equal(0);
+        });
+        it('doesn\'t update proxyAllowance after transfer if unlimited', async () => {
+            txHash = await zeroEx.token.transferAsync(exampleTokenAddress, coinbase, sender, transferAmount);
+            await zeroEx.awaitTransactionMinedAsync(txHash);
+            txHash = await zeroEx.token.setUnlimitedProxyAllowanceAsync(exampleTokenAddress, sender);
+            await zeroEx.awaitTransactionMinedAsync(txHash);
+            await exchangeTransferSimulator.transferFromAsync(
+                exampleTokenAddress, sender, recipient, transferAmount, TradeSide.Taker, TransferType.Trade,
+            );
+            const store = (exchangeTransferSimulator as any).store;
+            const senderBalance = await store.getBalanceAsync(exampleTokenAddress, sender);
+            const recipientBalance = await store.getBalanceAsync(exampleTokenAddress, recipient);
+            const senderProxyAllowance = await store.getProxyAllowanceAsync(exampleTokenAddress, sender);
+            expect(senderBalance).to.be.bignumber.equal(0);
+            expect(recipientBalance).to.be.bignumber.equal(transferAmount);
+            expect(senderProxyAllowance).to.be.bignumber.equal(zeroEx.token.UNLIMITED_ALLOWANCE_IN_BASE_UNITS);
+        });
+    });
+});