var assert = require('assert')
var sinon = require('sinon')
const ethUtil = require('ethereumjs-util')
var path = require('path')
var util = require(path.join(__dirname, '..', '..', 'app', 'util.js'))
describe('util', function() {
var ethInWei = '1'
for (var i = 0; i < 18; i++ ) { ethInWei += '0' }
beforeEach(function() {
this.sinon = sinon.sandbox.create()
})
afterEach(function() {
this.sinon.restore()
})
describe('numericBalance', function() {
it('should return a BN 0 if given nothing', function() {
var result = util.numericBalance()
assert.equal(result.toString(10), 0)
})
it('should work with hex prefix', function() {
var result = util.numericBalance('0x012')
assert.equal(result.toString(10), '18')
})
it('should work with no hex prefix', function() {
var result = util.numericBalance('012')
assert.equal(result.toString(10), '18')
})
})
describe('#ethToWei', function() {
it('should take an eth BN, returns wei BN', function() {
var input = new ethUtil.BN(1, 10)
var result = util.ethToWei(input)
assert.equal(result, ethInWei, '18 zeroes')
})
})
describe('#weiToEth', function() {
it('should take a wei BN and return an eth BN', function() {
var result = util.weiToEth(new ethUtil.BN(ethInWei))
assert.equal(result, '1', 'equals 1 eth')
})
})
describe('#formatBalance', function() {
it('when given nothing', function() {
var result = util.formatBalance()
assert.equal(result, 'None', 'should return "None"')
})
it('should return eth as string followed by ETH', function() {
var input = new ethUtil.BN(ethInWei, 10).toJSON()
var result = util.formatBalance(input)
assert.equal(result, '1.0000 ETH')
})
it('should return eth as string followed by ETH', function() {
var input = new ethUtil.BN(ethInWei, 10).div(new ethUtil.BN('2', 10)).toJSON()
var result = util.formatBalance(input)
assert.equal(result, '0.5000 ETH')
})
it('should display four decimal points', function() {
var input = "0x128dfa6a90b28000"
var result = util.formatBalance(input)
assert.equal(result, '1.3370 ETH')
})
})
describe('#normalizeToWei', function() {
it('should convert an eth to the appropriate equivalent values', function() {
var valueTable = {
wei: '1000000000000000000',
kwei: '1000000000000000',
mwei: '1000000000000',
gwei: '1000000000',
szabo: '1000000',
finney:'1000',
ether: '1',
kether:'0.001',
mether:'0.000001',
// AUDIT: We're getting BN numbers on these ones.
// I think they're big enough to ignore for now.
// gether:'0.000000001',
// tether:'0.000000000001',
}
var oneEthBn = new ethUtil.BN(ethInWei, 10)
for(var currency in valueTable) {
var value = new ethUtil.BN(valueTable[currency], 10)
var output = util.normalizeToWei(value, currency)
assert.equal(output.toString(10), valueTable.wei, `value of ${output.toString(10)} ${currency} should convert to ${oneEthBn}`)
}
})
})
})
