Crypto-ERC20-DevToken_Test_AndyWatt_TimeTravel

advanceTime = (time) => {
    return new Promise((resolve, reject) => {
      web3.currentProvider.send({
        jsonrpc: '2.0',
        method: 'evm_increaseTime',
        params: [time],
        id: new Date().getTime()
      }, (err, result) => {
        if (err) { return reject(err) }
        return resolve(result)
      })
    })
  }
  
  advanceBlock = () => {
    return new Promise((resolve, reject) => {
      web3.currentProvider.send({
        jsonrpc: '2.0',
        method: 'evm_mine',
        id: new Date().getTime()
      }, (err, result) => {
        if (err) { return reject(err) }
        const newBlockHash = web3.eth.getBlock('latest').hash
  
        return resolve(newBlockHash)
      })
    })
  }
  
  advanceTimeAndBlock = async (time) => {
    await advanceTime(time)
    await advanceBlock()
    return Promise.resolve(web3.eth.getBlock('latest'))
  }
  
  module.exports = {
    advanceTime,
    advanceBlock,
    advanceTimeAndBlock,
  }