text: const increaseTime = (time) => {
      return new Promise((resolve, reject) => {
          web3.currentProvider.sendAsync({
              jsonrpc: '2.0',
              method: 'evm_increaseTime',
              params: [time], // Time increase param.
              id: new Date().getTime()
          }, (err) => {
              if (err) {
                  return reject(err);
              }
  
              resolve();
          });
      });
  };
  
  const mine = () => {
      return new Promise((resolve, reject) => {
          web3.currentProvider.sendAsync({
              jsonrpc: '2.0',
              method: 'evm_mine',
              params: [],
              id: new Date().getTime()
          }, (err) => {
              if (err) {
                  return reject(err);
              }
  
              resolve();
          });
      });
  };
  
  export default { increaseTime, mine };