const assert = require('assert')
const ethUtil = require('ethereumjs-util')
const BN = ethUtil.BN

const TxUtils = require('../../app/scripts/lib/tx-utils')


describe('txUtils', function() {
  let txUtils

  before(function() {
    txUtils = new TxUtils()
  })

  describe('addGasBuffer', function() {
    describe('multiplies by 1.5', function() {
      it('over a value', function() {
        const input = '0x123fad'
        const output = txUtils.addGasBuffer(input, '0x3d4c52') //0x3d4c52 is 4mil for dummy gas limit

        const inputBn = new BN(input, 'hex')
        const outputBn = new BN(output, 'hex')
        const expectedBn = inputBn.mul(1.5)
        assert(outputBn.eq(expectedBn), 'returns 1.5 the input value')
      })
    })
  })
})