94 lines
2.7 KiB
JavaScript
94 lines
2.7 KiB
JavaScript
const assert = require('assert')
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const PendingBalanceCalculator = require('../../app/scripts/lib/pending-balance-calculator')
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const MockTxGen = require('../lib/mock-tx-gen')
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const BN = require('ethereumjs-util').BN
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let providerResultStub = {}
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const zeroBn = new BN(0)
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const etherBn = new BN(String(1e18))
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const ether = '0x' + etherBn.toString(16)
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describe('PendingBalanceCalculator', function () {
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let balanceCalculator
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describe('#calculateMaxCost(tx)', function () {
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it('returns a BN for a given tx value', function () {
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const txGen = new MockTxGen()
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pendingTxs = txGen.generate({
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status: 'submitted',
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txParams: {
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value: ether,
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gasPrice: '0x0',
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gas: '0x0',
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}
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}, { count: 1 })
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const balanceCalculator = generateBalanceCalcWith([], zeroBn)
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const result = balanceCalculator.calculateMaxCost(pendingTxs[0])
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assert.equal(result.toString(), etherBn.toString(), 'computes one ether')
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})
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it('calculates gas costs as well', function () {
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const txGen = new MockTxGen()
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pendingTxs = txGen.generate({
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status: 'submitted',
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txParams: {
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value: '0x0',
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gasPrice: '0x2',
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gas: '0x3',
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}
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}, { count: 1 })
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const balanceCalculator = generateBalanceCalcWith([], zeroBn)
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const result = balanceCalculator.calculateMaxCost(pendingTxs[0])
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assert.equal(result.toString(), '6', 'computes 6 wei of gas')
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})
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})
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describe('if you have no pending txs and one ether', function () {
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beforeEach(function () {
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balanceCalculator = generateBalanceCalcWith([], etherBn)
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})
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it('returns the network balance', async function () {
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const result = await balanceCalculator.getBalance()
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assert.equal(result, ether, `gave ${result} needed ${ether}`)
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})
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})
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describe('if you have a one ether pending tx and one ether', function () {
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beforeEach(function () {
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const txGen = new MockTxGen()
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pendingTxs = txGen.generate({
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status: 'submitted',
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txParams: {
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value: ether,
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gasPrice: '0x0',
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gas: '0x0',
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}
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}, { count: 1 })
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balanceCalculator = generateBalanceCalcWith(pendingTxs, etherBn)
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})
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it('returns the subtracted result', async function () {
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const result = await balanceCalculator.getBalance()
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assert.equal(result, '0x0', `gave ${result} needed '0x0'`)
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return true
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})
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})
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})
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function generateBalanceCalcWith (transactions, providerStub = zeroBn) {
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const getPendingTransactions = async () => transactions
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const getBalance = async () => providerStub
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return new PendingBalanceCalculator({
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getBalance,
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getPendingTransactions,
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})
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}
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