1 files changed, 115 insertions, 0 deletions
diff --git a/packages/contracts/test/ts/unlimitedAllowanceToken.ts b/packages/contracts/test/ts/unlimitedAllowanceToken.ts
new file mode 100644
index 000000000..cf217a8b6
--- /dev/null
+++ b/packages/contracts/test/ts/unlimitedAllowanceToken.ts
@@ -0,0 +1,115 @@
+import {ZeroEx} from '0x.js';
+import {BigNumber} from 'bignumber.js';
+import * as chai from 'chai';
+import * as Web3 from 'web3';
+
+import {Artifacts} from '../../util/artifacts';
+import {ContractInstance} from '../../util/types';
+
+import {chaiSetup} from './utils/chai_setup';
+
+const {DummyToken} = new Artifacts(artifacts);
+const web3: Web3 = (global as any).web3;
+chaiSetup.configure();
+const expect = chai.expect;
+
+contract('UnlimitedAllowanceToken', (accounts: string[]) => {
+  const zeroEx = new ZeroEx(web3.currentProvider);
+  const owner = accounts[0];
+  const spender = accounts[1];
+
+  const MAX_MINT_VALUE = new BigNumber(100000000000000000000);
+  let tokenAddress: string;
+  let token: ContractInstance;
+
+  beforeEach(async () => {
+    token = await DummyToken.new({from: owner});
+    await token.mint(MAX_MINT_VALUE, {from: owner});
+    tokenAddress = token.address;
+  });
+
+  describe('transfer', () => {
+    it('should transfer balance from sender to receiver', async () => {
+      const receiver = spender;
+      const initOwnerBalance = await zeroEx.token.getBalanceAsync(tokenAddress, owner);
+      const amountToTransfer = new BigNumber(1);
+      await zeroEx.token.transferAsync(tokenAddress, owner, receiver, amountToTransfer);
+      const finalOwnerBalance = await zeroEx.token.getBalanceAsync(tokenAddress, owner);
+      const finalReceiverBalance = await zeroEx.token.getBalanceAsync(tokenAddress, receiver);
+
+      const expectedFinalOwnerBalance = initOwnerBalance.minus(amountToTransfer);
+      const expectedFinalReceiverBalance = amountToTransfer;
+      expect(finalOwnerBalance).to.be.bignumber.equal(expectedFinalOwnerBalance);
+      expect(finalReceiverBalance).to.be.bignumber.equal(expectedFinalReceiverBalance);
+    });
+
+    it('should return true on a 0 value transfer', async () => {
+      const didReturnTrue = await token.transfer.call(spender, 0, {from: owner});
+      expect(didReturnTrue).to.be.true();
+    });
+  });
+
+  describe('transferFrom', () => {
+    it('should return false if owner has insufficient balance', async () => {
+      const ownerBalance = await zeroEx.token.getBalanceAsync(tokenAddress, owner);
+      const amountToTransfer = ownerBalance.plus(1);
+      await zeroEx.token.setAllowanceAsync(tokenAddress, owner, spender, amountToTransfer);
+      const didReturnTrue = await token.transferFrom.call(owner, spender, amountToTransfer, {from: spender});
+      expect(didReturnTrue).to.be.false();
+    });
+
+    it('should return false if spender has insufficient allowance', async () => {
+      const ownerBalance = await zeroEx.token.getBalanceAsync(tokenAddress, owner);
+      const amountToTransfer = ownerBalance;
+
+      const spenderAllowance = await zeroEx.token.getAllowanceAsync(tokenAddress, owner, spender);
+      const spenderAllowanceIsInsufficient = spenderAllowance.cmp(amountToTransfer) < 0;
+      expect(spenderAllowanceIsInsufficient).to.be.true();
+
+      const didReturnTrue = await token.transferFrom.call(owner, spender, amountToTransfer, {from: spender});
+      expect(didReturnTrue).to.be.false();
+    });
+
+    it('should return true on a 0 value transfer', async () => {
+      const amountToTransfer = 0;
+      const didReturnTrue = await token.transferFrom.call(owner, spender, amountToTransfer, {from: spender});
+      expect(didReturnTrue).to.be.true();
+    });
+
+    it('should not modify spender allowance if spender allowance is 2^256 - 1', async () => {
+      const initOwnerBalance = await zeroEx.token.getBalanceAsync(tokenAddress, owner);
+      const amountToTransfer = initOwnerBalance;
+      const initSpenderAllowance = zeroEx.token.UNLIMITED_ALLOWANCE_IN_BASE_UNITS;
+      await zeroEx.token.setAllowanceAsync(tokenAddress, owner, spender, initSpenderAllowance);
+      await zeroEx.token.transferFromAsync(tokenAddress, owner, spender, spender, amountToTransfer);
+
+      const newSpenderAllowance = await zeroEx.token.getAllowanceAsync(tokenAddress, owner, spender);
+      expect(initSpenderAllowance).to.be.bignumber.equal(newSpenderAllowance);
+    });
+
+    it('should transfer the correct balances if spender has sufficient allowance', async () => {
+      const initOwnerBalance = await zeroEx.token.getBalanceAsync(tokenAddress, owner);
+      const amountToTransfer = initOwnerBalance;
+      const initSpenderAllowance = initOwnerBalance;
+      await zeroEx.token.setAllowanceAsync(tokenAddress, owner, spender, initSpenderAllowance);
+      await zeroEx.token.transferFromAsync(tokenAddress, owner, spender, spender, amountToTransfer);
+
+      const newOwnerBalance = await zeroEx.token.getBalanceAsync(tokenAddress, owner);
+      const newSpenderBalance = await zeroEx.token.getBalanceAsync(tokenAddress, spender);
+
+      expect(newOwnerBalance).to.be.bignumber.equal(0);
+      expect(newSpenderBalance).to.be.bignumber.equal(initOwnerBalance);
+    });
+
+    it('should modify allowance if spender has sufficient allowance less than 2^256 - 1', async () => {
+      const initOwnerBalance = await zeroEx.token.getBalanceAsync(tokenAddress, owner);
+      const amountToTransfer = initOwnerBalance;
+      const initSpenderAllowance = initOwnerBalance;
+      await zeroEx.token.setAllowanceAsync(tokenAddress, owner, spender, initSpenderAllowance);
+      await zeroEx.token.transferFromAsync(tokenAddress, owner, spender, spender, amountToTransfer);
+
+      const newSpenderAllowance = await zeroEx.token.getAllowanceAsync(tokenAddress, owner, spender);
+      expect(newSpenderAllowance).to.be.bignumber.equal(0);
+    });
+  });
+});