Fixed webmentions unit test coverage

no issue

Try catch was not covered

ghost/webmentions/test/MentionSendingService.test.js

@@ -6,7 +6,6 @@ const externalRequest = require('../../core/core/server/lib/request-external.js'
 const sinon = require('sinon');
 const logging = require('@tryghost/logging');
 const {createModel} = require('./utils/index.js');
-const dnsPromises = require('dns').promises;
 
 // mock up job service
 let jobService = {
@@ -22,11 +21,6 @@ describe('MentionSendingService', function () {
         nock.disableNetConnect();
         sinon.stub(logging, 'info');
         errorLogStub = sinon.stub(logging, 'error');
-
-        // externalRequest does dns lookup; stub to make sure we don't fail with fake domain names
-        sinon.stub(dnsPromises, 'lookup').callsFake(function () {
-            return Promise.resolve({address: '123.123.123.123', family: 4});
-        });
     });
 
     afterEach(function () {

ghost/webmentions/test/MentionsAPI.test.js

@@ -4,6 +4,7 @@ const Mention = require('../lib/Mention');
 const MentionsAPI = require('../lib/MentionsAPI');
 const InMemoryMentionRepository = require('../lib/InMemoryMentionRepository');
 const sinon = require('sinon');
+const cheerio = require('cheerio');
 
 const mockRoutingService = {
     async pageExists() {
@@ -41,7 +42,7 @@ const mockWebmentionRequest = {
 
 function addMinutes(date, minutes) {
     date.setMinutes(date.getMinutes() + minutes);
-  
+
     return date;
 }
 
@@ -270,6 +271,29 @@ describe('MentionsAPI', function () {
         }
     });
 
+    it('Handles verify errors', async function () {
+        const repository = new InMemoryMentionRepository();
+        sinon.stub(cheerio, 'load').throws(new Error('Test error'));
+
+        const api = new MentionsAPI({
+            repository,
+            routingService: {
+                async pageExists() {
+                    return true;
+                }
+            },
+            resourceService: mockResourceService,
+            webmentionMetadata: mockWebmentionMetadata,
+            webmentionRequest: mockWebmentionRequest
+        });
+
+        await api.processWebmention({
+            source: new URL('https://source.com'),
+            target: new URL('https://target.com'),
+            payload: {}
+        });
+    });
+
     it('Will only store resource if if the resource type is post', async function () {
         const repository = new InMemoryMentionRepository();
         const api = new MentionsAPI({