Implement basic Auth module that fetches a token

lib/cli-modules/auth/auth.coffee

@@ -0,0 +1,8 @@
+server = require('../../server/server')
+
+exports.getToken = (credentials, callback) ->
+	server.post '/login_', credentials, (error, response) ->
+		return callback(error, response?.body)
+
+exports.login = (credentials, callback) ->
+	exports.getToken(credentials, callback)

lib/cli-modules/auth/auth.spec.coffee

@@ -0,0 +1,38 @@
+expect = require('chai').expect
+nock = require('nock')
+auth = require('./auth')
+config = require('../../config')
+johnDoeFixture = require('./fixtures/johndoe')
+
+describe 'Auth', ->
+
+	describe 'given valid credentials', ->
+
+		beforeEach ->
+			nock(config.baseUrl)
+				.post('/login_', johnDoeFixture.credentials)
+				.reply(200, johnDoeFixture.token)
+
+		describe '#getToken()', ->
+
+			it 'should return a token string', (done) ->
+				auth.getToken johnDoeFixture.credentials, (error, token) ->
+					return done(error) if error?
+					expect(token).to.be.a('string')
+					expect(token).to.equal(johnDoeFixture.token)
+					done()
+
+	describe 'given invalid credentials', ->
+
+		beforeEach ->
+			nock(config.baseUrl)
+				.post('/login_')
+				.reply(401)
+
+		describe '#getToken()', ->
+
+			it 'should return an error', (done) ->
+				auth.getToken johnDoeFixture.credentials, (error, token) ->
+					expect(error).to.exist
+					expect(error).to.be.an.instanceof(Error)
+					done()

lib/cli-modules/auth/fixtures/johndoe.json

@@ -0,0 +1,7 @@
+{
+	"token": "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1c2VybmFtZSI6Imp2aW90dGkiLCJlbWFpbCI6Imp1YW5jaGl2aW90dGlAZ21haWwuY29tIiwiZ2l0bGFiX2lkIjoxNjUsImhhc1Bhc3N3b3JkU2V0Ijp0cnVlLCJwdWJsaWNfa2V5Ijp0cnVlLCJmZWF0dXJlcyI6W10sImlkIjoxNzUsInBlcm1pc3Npb25zIjpbImV3YS5kZXZpY2UuZ2V0IiwiYWRtaW4uY3JlYXRlX2ludml0ZXMiLCJhZG1pbi5ob21lIiwiYWRtaW4ubG9naW5fYXNfdXNlciJdLCJpYXQiOjE0MTQ3NzMyMTN9.j4gMqZlnVohJt8jLpzpJWZS6rFUpNCWDwa13woo58aY",
+	"credentials": {
+		"username": "johndoe",
+		"password": "mysecret"
+	}
+}