Add metacoin example project

1 files changed, 62 insertions, 0 deletions

diff --git a/packages/metacoin/test/metacoin_test.ts b/packages/metacoin/test/metacoin_test.ts
new file mode 100644
index 000000000..f2b396ac2
--- /dev/null
+++ b/packages/metacoin/test/metacoin_test.ts
@@ -0,0 +1,62 @@
+import { BlockchainLifecycle, devConstants } from '@0xproject/dev-utils';
+import { LogWithDecodedArgs } from '@0xproject/types';
+import { BigNumber } from '@0xproject/utils';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
+import * as chai from 'chai';
+
+import { MetacoinContract, TransferContractEventArgs } from '../src/contract_wrappers/metacoin';
+
+import { chaiSetup } from './utils/chai_setup';
+import { deployer } from './utils/deployer';
+import { web3Wrapper } from './utils/web3_wrapper';
+
+chaiSetup.configure();
+const { expect } = chai;
+const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
+
+describe('Metacoin', () => {
+    let metacoin: MetacoinContract;
+    const ownerAddress = devConstants.TESTRPC_FIRST_ADDRESS;
+    const INITIAL_BALANCE = new BigNumber(10000);
+    before(async () => {
+        const metacoinInstance = await deployer.deployAsync('Metacoin');
+        web3Wrapper.abiDecoder.addABI(metacoinInstance.abi);
+        metacoin = new MetacoinContract(web3Wrapper, metacoinInstance.abi, metacoinInstance.address);
+    });
+    beforeEach(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    afterEach(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+    describe('#constructor', () => {
+        it(`should initialy give ${INITIAL_BALANCE} tokens to the creator`, async () => {
+            const balance = await metacoin.balances.callAsync(ownerAddress);
+            expect(balance).to.be.bignumber.equal(INITIAL_BALANCE);
+        });
+    });
+    describe('#transfer', () => {
+        it(`should successfully transfer tokens`, async () => {
+            const ZERO_ADDRESS = '0x0000000000000000000000000000000000000000';
+            const amount = INITIAL_BALANCE.div(2);
+            const oldBalance = await metacoin.balances.callAsync(ZERO_ADDRESS);
+            expect(oldBalance).to.be.bignumber.equal(0);
+            const txHash = await metacoin.transfer.sendTransactionAsync(
+                {
+                    to: ZERO_ADDRESS,
+                    amount,
+                },
+                { from: devConstants.TESTRPC_FIRST_ADDRESS },
+            );
+            const txReceipt = await web3Wrapper.awaitTransactionMinedAsync(txHash);
+            const transferLogs = txReceipt.logs[0] as LogWithDecodedArgs<TransferContractEventArgs>;
+            expect(transferLogs.args).to.be.deep.equal({
+                _to: ZERO_ADDRESS,
+                _from: devConstants.TESTRPC_FIRST_ADDRESS,
+                _value: amount,
+            });
+            const newBalance = await metacoin.balances.callAsync(ZERO_ADDRESS);
+            expect(newBalance).to.be.bignumber.equal(amount);
+        });
+    });
+});