unit test for getRabbitMQUrl

.gitignore

@@ -3,3 +3,4 @@ node_modules
 .DS_Store
 .queues
 npm-debug.log
+coverage

README.md

@@ -43,6 +43,34 @@ bus.listen('my.event', { ack: true }, function (event) {
 
   Message acknowledgement is suited for use in load distribution scenarios. 
 
+## Authentication (RabbitMQ Bus)
+
+### Fully qualified url
+
+You may authenticate by providing `url` as an option when initializin the bus, or setting RABBITMQ_URL as an environment variable. RabbitMQ uses basic auth url format for authentication.
+
+```
+var bus = servicebus.bus({
+  url: "amqp://user:pass@localhost:5672,
+})
+```
+
+### config options
+
+Alternatively, you may provide a `user`, `password`, `host` (optional, default = 'localhost'), and `port` (optional, default = 5672), and servicebus will construct the url before passing it to RabbitMQ.
+
+```
+var bus = servicebus.bus({
+  user: 'rabbitUser',
+  password: 'test1234',
+  host: '1.1.1.1'
+  port: '5555'
+})
+```
+
+NOTE:
+If `url` and `user/password` are provided, the `url` will be used.
+
 # Publish / Subscribe
 
   Servicebus can also send messages from 1:N processes in a fan-out architecture. In this pattern, one sender publishes a message and any number of subscribers can receive. The pattern for usage looks very similar to send/listen:

__tests__/rabbitmq/bus.js

@@ -0,0 +1,14 @@
+const getRabbitMQUrl = require('rabbitmq/bus').getRabbitMQUrl
+
+describe('getRabbitMQUrl', () => {
+  it('determines url based on options available', () => {
+    let url = getRabbitMQUrl({ url: 'amqp://rabbitmq:5672' })
+    expect(url).toBe('amqp://rabbitmq:5672')
+
+    url = getRabbitMQUrl({ user: 'pat', password: 'test1234' })
+    expect(url).toBe('amqp://pat:test1234@localhost:5672')
+
+    url = getRabbitMQUrl({ user: 'pat', password: 'test1234', host: 'myhost', port: 5555 })
+    expect(url).toBe('amqp://pat:test1234@myhost:5555')
+  })
+})

bus/rabbitmq/bus.js

@@ -10,7 +10,7 @@ var amqp = require('amqplib'),
     Queue = require('./queue'),
     util = require('util');
 
-function getRabbitMQUrl (options) {
+module.exports.getRabbitMQUrl = function getRabbitMQUrl (options) {
   var rabbitUrl = options.url || process.env.RABBITMQ_URL;
   if (!rabbitUrl) {
     // see if url can be built with user and password

jest.json

@@ -0,0 +1,11 @@
+{
+  "roots": ["__tests__"],
+  "testEnvironment": "node",
+  "modulePaths": [
+    "bus",
+    "/node_modules/"
+  ],
+  "collectCoverageFrom" : [
+    "bus/**/*.js"
+  ]
+}