Add complex crowdsale example #331 tests

test/SampleCrowdsale.js

+import ether from './helpers/ether'
+import advanceToBlock from './helpers/advanceToBlock'
+import EVMThrow from './helpers/EVMThrow'
+
+const BigNumber = web3.BigNumber;
+
+const should = require('chai')
+  .use(require('chai-as-promised'))
+  .use(require('chai-bignumber')(BigNumber))
+  .should();
+
+const SampleCrowdsale = artifacts.require('SampleCrowdsale');
+const SampleCrowdsaleToken = artifacts.require('SampleCrowdsaleToken');
+
+contract('Crowdsale', function ([owner, wallet, investor]) {
+
+  const RATE = new BigNumber(10);
+  const GOAL = ether(10);
+  const CAP  = ether(20);
+
+  beforeEach(async function () {
+    this.startBlock = web3.eth.blockNumber + 10;
+    this.endBlock =   web3.eth.blockNumber + 20;
+
+    this.crowdsale = await SampleCrowdsale.new(this.startBlock, this.endBlock, RATE, GOAL, CAP, wallet);
+    this.token = SampleCrowdsaleToken.at(await this.crowdsale.token());
+  });
+
+  
+  it('should create crowdsale with correct parameters', async function () {
+    this.crowdsale.should.exist;
+    this.token.should.exist;
+
+    (await this.crowdsale.startBlock()).should.be.bignumber.equal(this.startBlock);
+    (await this.crowdsale.endBlock()).should.be.bignumber.equal(this.endBlock);
+    (await this.crowdsale.rate()).should.be.bignumber.equal(RATE);
+    (await this.crowdsale.wallet()).should.be.bignumber.equal(wallet);
+    (await this.crowdsale.goal()).should.be.bignumber.equal(GOAL);
+    (await this.crowdsale.cap()).should.be.bignumber.equal(CAP);
+  });
+
+  it('should not accept payments before start', async function () {
+    await this.crowdsale.send(ether(1)).should.be.rejectedWith(EVMThrow);
+    await this.crowdsale.buyTokens(investor, {from: investor, value: ether(1)}).should.be.rejectedWith(EVMThrow);
+  });
+
+  it('should accept payments during the sale', async function () {
+    const investmentAmount = ether(1);
+    const expectedTokenAmount = RATE.mul(investmentAmount);
+
+    await advanceToBlock(this.startBlock - 1);
+    await this.crowdsale.buyTokens(investor, {value: investmentAmount, from: investor}).should.be.fulfilled;
+
+    (await this.token.balanceOf(investor)).should.be.bignumber.equal(expectedTokenAmount);
+    (await this.token.totalSupply()).should.be.bignumber.equal(expectedTokenAmount);
+  });
+
+  it('should reject payments after end', async function () {
+    await advanceToBlock(this.endBlock);
+    await this.crowdsale.send(ether(1)).should.be.rejectedWith(EVMThrow);
+    await this.crowdsale.buyTokens(investor, {value: ether(1), from: investor}).should.be.rejectedWith(EVMThrow);
+  });
+
+  it('should reject payments over cap', async function () {
+    await advanceToBlock(this.startBlock - 1);
+    await this.crowdsale.send(CAP);
+    await this.crowdsale.send(1).should.be.rejectedWith(EVMThrow);
+  });
+
+  it('should allow finalization and transfer funds to wallet if the goal is reached', async function () {
+    await advanceToBlock(this.endBlock - 1);
+    await this.crowdsale.send(GOAL);
+
+    const beforeFinalization = web3.eth.getBalance(wallet);
+    await this.crowdsale.finalize({from: owner});
+    const afterFinalization = web3.eth.getBalance(wallet);
+
+    afterFinalization.minus(beforeFinalization).should.be.bignumber.equal(GOAL);
+  });
+
+  it('should allow refunds if the goal is not reached', async function () {
+    const balanceBeforeInvestment = web3.eth.getBalance(investor);
+
+    await advanceToBlock(this.startBlock - 1);
+    await this.crowdsale.sendTransaction({value: ether(1), from: investor, gasPrice: 0});
+    await advanceToBlock(this.endBlock);
+
+    await this.crowdsale.finalize({from: owner});
+    await this.crowdsale.claimRefund({from: investor, gasPrice: 0}).should.be.fulfilled;
+
+    const balanceAfterRefund = web3.eth.getBalance(investor);
+    balanceBeforeInvestment.should.be.bignumber.equal(balanceAfterRefund);
+  });
+
+});