text: import ether from '../helpers/ether';
  import { advanceBlock } from '../helpers/advanceToBlock';
  import { increaseTimeTo, duration } from '../helpers/increaseTime';
  import latestTime from '../helpers/latestTime';
  import EVMRevert from '../helpers/EVMRevert';
  
  const BigNumber = web3.BigNumber;
  
  require('chai')
    .use(require('chai-as-promised'))
    .use(require('chai-bignumber')(BigNumber))
    .should();
  
  const RefundableCrowdsale = artifacts.require('RefundableCrowdsaleImpl');
  const MintableToken = artifacts.require('MintableToken');
  
  contract('RefundableCrowdsale', function ([_, owner, wallet, investor]) {
    const rate = new BigNumber(1000);
    const goal = ether(800);
    const lessThanGoal = ether(750);
  
    before(async function () {
      // Advance to the next block to correctly read time in the solidity "now" function interpreted by testrpc
      await advanceBlock();
    });
  
    beforeEach(async function () {
      this.startTime = latestTime() + duration.weeks(1);
      this.endTime = this.startTime + duration.weeks(1);
      this.afterEndTime = this.endTime + duration.seconds(1);
  
      this.token = await MintableToken.new();
      this.crowdsale = await RefundableCrowdsale.new(
        this.startTime, this.endTime, rate, wallet, goal, this.token.address, { from: owner }
      );
      await this.token.transferOwnership(this.crowdsale.address);
    });
  
    describe('creating a valid crowdsale', function () {
      it('should fail with zero goal', async function () {
        await RefundableCrowdsale.new(this.startTime, this.endTime, rate, wallet, 0, { from: owner })
          .should.be.rejectedWith(EVMRevert);
      });
    });
  
    it('should deny refunds before end', async function () {
      await this.crowdsale.claimRefund({ from: investor }).should.be.rejectedWith(EVMRevert);
      await increaseTimeTo(this.startTime);
      await this.crowdsale.claimRefund({ from: investor }).should.be.rejectedWith(EVMRevert);
    });
  
    it('should deny refunds after end if goal was reached', async function () {
      await increaseTimeTo(this.startTime);
      await this.crowdsale.sendTransaction({ value: goal, from: investor });
      await increaseTimeTo(this.afterEndTime);
      await this.crowdsale.claimRefund({ from: investor }).should.be.rejectedWith(EVMRevert);
    });
  
    it('should allow refunds after end if goal was not reached', async function () {
      await increaseTimeTo(this.startTime);
      await this.crowdsale.sendTransaction({ value: lessThanGoal, from: investor });
      await increaseTimeTo(this.afterEndTime);
  
      await this.crowdsale.finalize({ from: owner });
  
      const pre = web3.eth.getBalance(investor);
      await this.crowdsale.claimRefund({ from: investor, gasPrice: 0 })
        .should.be.fulfilled;
      const post = web3.eth.getBalance(investor);
  
      post.minus(pre).should.be.bignumber.equal(lessThanGoal);
    });
  
    it('should forward funds to wallet after end if goal was reached', async function () {
      await increaseTimeTo(this.startTime);
      await this.crowdsale.sendTransaction({ value: goal, from: investor });
      await increaseTimeTo(this.afterEndTime);
  
      const pre = web3.eth.getBalance(wallet);
      await this.crowdsale.finalize({ from: owner });
      const post = web3.eth.getBalance(wallet);
  
      post.minus(pre).should.be.bignumber.equal(goal);
    });
  });
  