[ctan] add tests (#2191)

* add ctan tests

* prettier

services/ctan/ctan.service.js

@@ -9,6 +9,9 @@ const { addv: versionText } = require('../../lib/text-formatters')
 const { version: versionColor } = require('../../lib/color-formatters')
 
 module.exports = class Ctan extends LegacyService {
+  static get url() {
+    return { base: 'ctan' }
+  }
   static registerLegacyRouteHandler({ camp, cache }) {
     camp.route(
       /^\/ctan\/([vl])\/([^/]+)\.(svg|png|gif|jpg|json)$/,

services/ctan/ctan.tester.js

@@ -0,0 +1,43 @@
+'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('license')
+  .get('/l/novel.json')
+  .expectJSON({
+    name: 'license',
+    value: 'lppl1.3c,ofl',
+  })
+
+t.create('version')
+  .get('/v/novel.json')
+  .expectJSONTypes(
+    Joi.object().keys({
+      name: 'ctan',
+      value: isVPlusDottedVersionAtLeastOne,
+    })
+  )
+
+t.create('version (mocked)')
+  .get('/v/novel.json?style=_shields_test')
+  .intercept(nock =>
+    nock('http://www.ctan.org')
+      .get('/json/pkg/novel')
+      .reply(200, {
+        version: {
+          number: 'v1.11',
+        },
+      })
+  )
+  .expectJSON({
+    name: 'ctan',
+    value: 'v1.11',
+    colorB: colorScheme.blue,
+  })