add tests for [cookbook] service (#2197)

services/cookbook/cookbook.service.js

@@ -7,6 +7,9 @@ const { version: versionColor } = require('../../lib/color-formatters')
 
 // For Chef cookbook.
 module.exports = class Cookbook extends LegacyService {
+  static get url() {
+    return { base: 'cookbook' }
+  }
   static registerLegacyRouteHandler({ camp, cache }) {
     camp.route(
       /^\/cookbook\/v\/(.*)\.(svg|png|gif|jpg|json)$/,

services/cookbook/cookbook.tester.js

@@ -0,0 +1,34 @@
+'use strict'
+
+const Joi = require('joi')
+const createServiceTester = require('../create-service-tester')
+const { colorScheme } = require('../test-helpers')
+const { isVPlusDottedVersionAtLeastOne } = require('../test-validators')
+
+const t = createServiceTester()
+
+module.exports = t
+
+t.create('version')
+  .get('/v/chef-sugar.json')
+  .expectJSONTypes(
+    Joi.object().keys({
+      name: 'cookbook',
+      value: isVPlusDottedVersionAtLeastOne,
+    })
+  )
+
+t.create('version (mocked)')
+  .get('/v/chef-sugar.json?style=_shields_test')
+  .intercept(nock =>
+    nock('https://supermarket.getchef.com')
+      .get('/api/v1/cookbooks/chef-sugar/versions/latest')
+      .reply(200, {
+        version: '4.1.0',
+      })
+  )
+  .expectJSON({
+    name: 'cookbook',
+    value: 'v4.1.0',
+    colorB: colorScheme.blue,
+  })