Add unit test.

README.md

@@ -10,15 +10,12 @@ $ npm install --save wait-transaction
 ## Usage
 
 ```js
-import waitTransaction from 'wait-transaction'
-const wait = waitTransaction(web3)
+// pass a valid web3 instance that the providers set
+const waitTransaction = require('wait-transaction')(web3)
 
-it('should add funds sent by the seller to sellerFunds', () => {
-  const contract = MyContract.deployed()
-  return wait({ from: web3.eth.accounts[0], to: contract.address, value: 1000 })
-    .then(() => web3.eth.getBalance(contract.address))
-    .then(balance => assert.equal(1000, balance))
-})
+waitTransaction({ from: web3.eth.accounts[0], to: emptyAccount.address, value: 1000 })
+  .then(() => web3.eth.getBalance(emptyAccount.address).valueOf())
+  .then(balance => assert.equal(1000, balance))
 ```
 
 ## License

package.json

@@ -2,9 +2,11 @@
   "name": "wait-transaction",
   "description": "A promisified web3.eth.sendTransaction that waits for confirmation ",
   "scripts": {
-    "lint": "standard \"test/**/*.js\" \"src/**/*.js\"",
+    "lint": "standard \"test.js\" \"src/**/*.js\"",
     "build": "babel src -d lib",
-    "watch": "chokidar \"test/**/*.js\" \"src/**/*.js\" -c \"npm run lint ; npm run build && npm run test\""
+    "test": "npm run lint && npm run testrunner",
+    "testrunner": "mocha --compilers js:babel-register",
+    "watch": "chokidar \"test.js\" \"src/**/*.js\" -c \"npm run lint ; npm run build && npm run testrunner\""
   },
   "main": "lib/index.js",
   "private": true,
@@ -17,6 +19,7 @@
   "devDependencies": {
     "babel-cli": "^6.9.0",
     "babel-preset-es2015": "^6.9.0",
+    "babel-register": "^6.9.0",
     "chai": "^3.5.0",
     "chokidar": "^1.5.0",
     "mocha": "^2.4.5",

test.js

@@ -0,0 +1,25 @@
+/* global describe, it */
+
+const { assert } = require('chai')
+const Web3 = require('web3')
+const web3 = new Web3()
+web3.setProvider(new web3.providers.HttpProvider('http://localhost:8545'))
+const waitTransaction = require('./lib')(web3)
+
+/** Returns true if the difference between the two values is less than the given margin of error */
+const within = (margin, a, b) => Math.abs(a - b) < margin
+
+describe('wait-transaction', () => {
+  it('should send ether from one account to another', () => {
+    const [account1, account2] = web3.eth.accounts
+    const balance1 = +web3.eth.getBalance(account1).valueOf()
+    const balance2 = +web3.eth.getBalance(account2).valueOf()
+
+    return waitTransaction({ from: account1, to: account2, value: balance1 / 2 }).then(() => {
+      const newBalance1 = +web3.eth.getBalance(account1).valueOf()
+      const newBalance2 = +web3.eth.getBalance(account2).valueOf()
+      assert(within(balance1 / 1e12, newBalance1, balance1 / 2))
+      assert(within(balance2 / 1e12, newBalance2, balance2 + balance1 / 2))
+    })
+  })
+})