Add test template

test/unit/pending-balance-test.js

@@ -0,0 +1,37 @@
+const assert = require('assert')
+const PendingBalanceCalculator = require('../../app/scripts/lib/pending-balance-calculator')
+const MockTxGen = require('../lib/mock-tx-gen')
+const BN = require('ethereumjs-util').BN
+let providerResultStub = {}
+
+describe('PendingBalanceCalculator', function () {
+  let nonceTracker
+
+  describe('if you have no pending txs and one ether', function () {
+    const ether = '0x' + (new BN(1e18)).toString(16)
+
+    beforeEach(function () {
+      nonceTracker = generateNonceTrackerWith([], ether)
+    })
+
+    it('returns the network balance', function () {
+      const result = nonceTracker.getBalance()
+      assert.equal(result, ether, 'returns one ether')
+    })
+  })
+})
+
+function generateBalaneCalcWith (transactions, providerStub = '0x0') {
+  const getPendingTransactions = () => transactions
+  providerResultStub.result = providerStub
+  const provider = {
+    sendAsync: (_, cb) => { cb(undefined, providerResultStub) },
+    _blockTracker: {
+      getCurrentBlock: () => '0x11b568',
+    },
+  }
+  return new PendingBalanceCalculator({
+    provider,
+    getPendingTransactions,
+  })
+}