metamask-extension/ui/app/helpers/confirm-transaction/util.test.js

import * as utils from './util'
import assert from 'assert'

describe('Confirm Transaction utils', () => {
  describe('increaseLastGasPrice', () => {
    it('should increase the gasPrice by 10%', () => {
      const increasedGasPrice = utils.increaseLastGasPrice('0xa')
      assert.equal(increasedGasPrice, '0xb')
    })

    it('should prefix the result with 0x', () => {
      const increasedGasPrice = utils.increaseLastGasPrice('a')
      assert.equal(increasedGasPrice, '0xb')
    })
  })

  describe('hexGreaterThan', () => {
    it('should return true if the first value is greater than the second value', () => {
      assert.equal(
        utils.hexGreaterThan('0xb', '0xa'),
        true
      )
    })

    it('should return false if the first value is less than the second value', () => {
      assert.equal(
        utils.hexGreaterThan('0xa', '0xb'),
        false
      )
    })

    it('should return false if the first value is equal to the second value', () => {
      assert.equal(
        utils.hexGreaterThan('0xa', '0xa'),
        false
      )
    })

    it('should correctly compare prefixed and non-prefixed hex values', () => {
      assert.equal(
        utils.hexGreaterThan('0xb', 'a'),
        true
      )
    })
  })

  describe('getHexGasTotal', () => {
    it('should multiply the hex gasLimit and hex gasPrice values together', () => {
      assert.equal(
        utils.getHexGasTotal({ gasLimit: '0x5208', gasPrice: '0x3b9aca00' }),
        '0x1319718a5000'
      )
    })

    it('should prefix the result with 0x', () => {
      assert.equal(
        utils.getHexGasTotal({ gasLimit: '5208', gasPrice: '3b9aca00' }),
        '0x1319718a5000'
      )
    })
  })

  describe('addEth', () => {
    it('should add two values together rounding to 6 decimal places', () => {
      assert.equal(
        utils.addEth('0.12345678', '0'),
        '0.123457'
      )
    })

    it('should add any number of values together rounding to 6 decimal places', () => {
      assert.equal(
        utils.addEth('0.1', '0.02', '0.003', '0.0004', '0.00005', '0.000006', '0.0000007'),
        '0.123457'
      )
    })
  })

  describe('addFiat', () => {
    it('should add two values together rounding to 2 decimal places', () => {
      assert.equal(
        utils.addFiat('0.12345678', '0'),
        '0.12'
      )
    })

    it('should add any number of values together rounding to 2 decimal places', () => {
      assert.equal(
        utils.addFiat('0.1', '0.02', '0.003', '0.0004', '0.00005', '0.000006', '0.0000007'),
        '0.12'
      )
    })
  })

  describe('getValueFromWeiHex', () => {
    it('should get the transaction amount in ETH', () => {
      const ethTransactionAmount = utils.getValueFromWeiHex({
        value: '0xde0b6b3a7640000', toCurrency: 'ETH', conversionRate: 468.58, numberOfDecimals: 6,
      })

      assert.equal(ethTransactionAmount, '1')
    })

    it('should get the transaction amount in fiat', () => {
      const fiatTransactionAmount = utils.getValueFromWeiHex({
        value: '0xde0b6b3a7640000', toCurrency: 'usd', conversionRate: 468.58, numberOfDecimals: 2,
      })

      assert.equal(fiatTransactionAmount, '468.58')
    })
  })

  describe('getTransactionFee', () => {
    it('should get the transaction fee in ETH', () => {
      const ethTransactionFee = utils.getTransactionFee({
        value: '0x1319718a5000', toCurrency: 'ETH', conversionRate: 468.58, numberOfDecimals: 6,
      })

      assert.equal(ethTransactionFee, '0.000021')
    })

    it('should get the transaction fee in fiat', () => {
      const fiatTransactionFee = utils.getTransactionFee({
        value: '0x1319718a5000', toCurrency: 'usd', conversionRate: 468.58, numberOfDecimals: 2,
      })

      assert.equal(fiatTransactionFee, '0.01')
    })
  })

  describe('formatCurrency', () => {
    it('should format USD values', () => {
      const value = utils.formatCurrency('123.45', 'usd')
      assert.equal(value, '$123.45')
    })
  })
})