fix(httpClient): Send library version with each request headers

Author: trodrigues

lib/create-http-client.js

@@ -1,6 +1,6 @@
 /* @flow */
-import {defaults} from 'lodash/object'
 import qs from 'querystring'
+import packageFile from '../package.json'
 
 type HttpClientParams = {
   space: string,
@@ -19,13 +19,13 @@ export default function createHttpClient (axios: Object, {space, accessToken, in
   let [hostname, port] = (host && host.split(':')) || []
   hostname = hostname || 'cdn.contentful.com'
   port = port || (insecure ? 80 : 443)
+  headers = headers || {}
+  headers['Content-Type'] = 'application/vnd.contentful.delivery.v1+json'
+  headers['X-Contentful-User-Agent'] = 'contentful.js/' + packageFile.version
 
   return axios.create({
     baseURL: `${insecure ? 'http' : 'https'}://${hostname}:${port}/spaces/${space}/`,
-    headers: defaults({
-      'Content-Type': 'application/vnd.contentful.delivery.v1+json',
-      'X-Contentful-User-Agent': 'contentful.js/3.x'
-    }, headers),
+    headers: headers,
     agent: agent,
     params: {
       access_token: accessToken

test/unit/create-http-client-test.js

@@ -8,11 +8,16 @@ test('Calls axios with expected URL', t => {
     create: sinon.stub()
   }
 
+  createHttpClient.__Rewire__('packageFile', {
+    version: 'version'
+  })
+
   createHttpClient(axios, {
     accessToken: 'clientAccessToken',
     space: 'clientSpaceId'
   })
 
   t.equals(axios.create.args[0][0].baseURL, 'https://cdn.contentful.com:443/spaces/clientSpaceId/')
+  t.equals(axios.create.args[0][0].headers['X-Contentful-User-Agent'], 'contentful.js/version')
   t.end()
 })