1 files changed, 191 insertions, 0 deletions
diff --git a/contracts/core/test/tokens/unlimited_allowance_token.ts b/contracts/core/test/tokens/unlimited_allowance_token.ts
new file mode 100644
index 000000000..ea5a50522
--- /dev/null
+++ b/contracts/core/test/tokens/unlimited_allowance_token.ts
@@ -0,0 +1,191 @@
+import { BlockchainLifecycle } from '@0x/dev-utils';
+import { RevertReason } from '@0x/types';
+import { BigNumber } from '@0x/utils';
+import * as chai from 'chai';
+
+import { DummyERC20TokenContract } from '../../generated-wrappers/dummy_erc20_token';
+import { artifacts } from '../../src/artifacts';
+import { expectContractCallFailedAsync } from '../utils/assertions';
+import { chaiSetup } from '../utils/chai_setup';
+import { constants } from '../utils/constants';
+import { provider, txDefaults, web3Wrapper } from '../utils/web3_wrapper';
+
+chaiSetup.configure();
+const expect = chai.expect;
+const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
+
+describe('UnlimitedAllowanceToken', () => {
+    let owner: string;
+    let spender: string;
+    const MAX_MINT_VALUE = new BigNumber(10000000000000000000000);
+    let token: DummyERC20TokenContract;
+
+    before(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    after(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+    before(async () => {
+        const accounts = await web3Wrapper.getAvailableAddressesAsync();
+        owner = accounts[0];
+        spender = accounts[1];
+        token = await DummyERC20TokenContract.deployFrom0xArtifactAsync(
+            artifacts.DummyERC20Token,
+            provider,
+            txDefaults,
+            constants.DUMMY_TOKEN_NAME,
+            constants.DUMMY_TOKEN_SYMBOL,
+            constants.DUMMY_TOKEN_DECIMALS,
+            constants.DUMMY_TOKEN_TOTAL_SUPPLY,
+        );
+        await web3Wrapper.awaitTransactionSuccessAsync(
+            await token.mint.sendTransactionAsync(MAX_MINT_VALUE, { from: owner }),
+            constants.AWAIT_TRANSACTION_MINED_MS,
+        );
+    });
+    beforeEach(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    afterEach(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+    describe('transfer', () => {
+        it('should throw if owner has insufficient balance', async () => {
+            const ownerBalance = await token.balanceOf.callAsync(owner);
+            const amountToTransfer = ownerBalance.plus(1);
+            return expectContractCallFailedAsync(
+                token.transfer.callAsync(spender, amountToTransfer, { from: owner }),
+                RevertReason.Erc20InsufficientBalance,
+            );
+        });
+
+        it('should transfer balance from sender to receiver', async () => {
+            const receiver = spender;
+            const initOwnerBalance = await token.balanceOf.callAsync(owner);
+            const amountToTransfer = new BigNumber(1);
+            await web3Wrapper.awaitTransactionSuccessAsync(
+                await token.transfer.sendTransactionAsync(receiver, amountToTransfer, { from: owner }),
+                constants.AWAIT_TRANSACTION_MINED_MS,
+            );
+            const finalOwnerBalance = await token.balanceOf.callAsync(owner);
+            const finalReceiverBalance = await token.balanceOf.callAsync(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.callAsync(spender, new BigNumber(0), {
+                from: owner,
+            });
+            expect(didReturnTrue).to.be.true();
+        });
+    });
+
+    describe('transferFrom', () => {
+        it('should throw if owner has insufficient balance', async () => {
+            const ownerBalance = await token.balanceOf.callAsync(owner);
+            const amountToTransfer = ownerBalance.plus(1);
+            await web3Wrapper.awaitTransactionSuccessAsync(
+                await token.approve.sendTransactionAsync(spender, amountToTransfer, { from: owner }),
+                constants.AWAIT_TRANSACTION_MINED_MS,
+            );
+            return expectContractCallFailedAsync(
+                token.transferFrom.callAsync(owner, spender, amountToTransfer, {
+                    from: spender,
+                }),
+                RevertReason.Erc20InsufficientBalance,
+            );
+        });
+
+        it('should throw if spender has insufficient allowance', async () => {
+            const ownerBalance = await token.balanceOf.callAsync(owner);
+            const amountToTransfer = ownerBalance;
+
+            const spenderAllowance = await token.allowance.callAsync(owner, spender);
+            const isSpenderAllowanceInsufficient = spenderAllowance.cmp(amountToTransfer) < 0;
+            expect(isSpenderAllowanceInsufficient).to.be.true();
+
+            return expectContractCallFailedAsync(
+                token.transferFrom.callAsync(owner, spender, amountToTransfer, {
+                    from: spender,
+                }),
+                RevertReason.Erc20InsufficientAllowance,
+            );
+        });
+
+        it('should return true on a 0 value transfer', async () => {
+            const amountToTransfer = new BigNumber(0);
+            const didReturnTrue = await token.transferFrom.callAsync(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 token.balanceOf.callAsync(owner);
+            const amountToTransfer = initOwnerBalance;
+            const initSpenderAllowance = constants.UNLIMITED_ALLOWANCE_IN_BASE_UNITS;
+            await web3Wrapper.awaitTransactionSuccessAsync(
+                await token.approve.sendTransactionAsync(spender, initSpenderAllowance, { from: owner }),
+                constants.AWAIT_TRANSACTION_MINED_MS,
+            );
+            await web3Wrapper.awaitTransactionSuccessAsync(
+                await token.transferFrom.sendTransactionAsync(owner, spender, amountToTransfer, {
+                    from: spender,
+                    gas: constants.MAX_TOKEN_TRANSFERFROM_GAS,
+                }),
+                constants.AWAIT_TRANSACTION_MINED_MS,
+            );
+
+            const newSpenderAllowance = await token.allowance.callAsync(owner, spender);
+            expect(initSpenderAllowance).to.be.bignumber.equal(newSpenderAllowance);
+        });
+
+        it('should transfer the correct balances if spender has sufficient allowance', async () => {
+            const initOwnerBalance = await token.balanceOf.callAsync(owner);
+            const amountToTransfer = initOwnerBalance;
+            const initSpenderAllowance = initOwnerBalance;
+            await web3Wrapper.awaitTransactionSuccessAsync(
+                await token.approve.sendTransactionAsync(spender, initSpenderAllowance, { from: owner }),
+                constants.AWAIT_TRANSACTION_MINED_MS,
+            );
+            await web3Wrapper.awaitTransactionSuccessAsync(
+                await token.transferFrom.sendTransactionAsync(owner, spender, amountToTransfer, {
+                    from: spender,
+                    gas: constants.MAX_TOKEN_TRANSFERFROM_GAS,
+                }),
+                constants.AWAIT_TRANSACTION_MINED_MS,
+            );
+
+            const newOwnerBalance = await token.balanceOf.callAsync(owner);
+            const newSpenderBalance = await token.balanceOf.callAsync(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 token.balanceOf.callAsync(owner);
+            const amountToTransfer = initOwnerBalance;
+            const initSpenderAllowance = initOwnerBalance;
+            await web3Wrapper.awaitTransactionSuccessAsync(
+                await token.approve.sendTransactionAsync(spender, initSpenderAllowance, { from: owner }),
+                constants.AWAIT_TRANSACTION_MINED_MS,
+            );
+            await web3Wrapper.awaitTransactionSuccessAsync(
+                await token.transferFrom.sendTransactionAsync(owner, spender, amountToTransfer, {
+                    from: spender,
+                    gas: constants.MAX_TOKEN_TRANSFERFROM_GAS,
+                }),
+                constants.AWAIT_TRANSACTION_MINED_MS,
+            );
+
+            const newSpenderAllowance = await token.allowance.callAsync(owner, spender);
+            expect(newSpenderAllowance).to.be.bignumber.equal(0);
+        });
+    });
+});