Start setting up WebMock to stub responses

spec/helpers/external/mailbluster_helper_spec.rb

@@ -8,9 +8,38 @@ describe  External::MailblusterHelper, type: :helper do
 
   describe 'create_lead' do
     it 'makes a post request to Mailbluster\'s API' do
+      stub_request(:post, "http://api.mailbluster.com/api/leads")
+        .to_return(body: '{
+          "message": "Lead created",
+          "lead": {
+            "id": 329395,
+            "firstName": "Richard",
+            "lastName": "Hendricks",
+            "fullName": "Richard Hendricks",
+            "email": "richard@example.com",
+            "timezone": "America/Los_Angeles",
+            "ipAddress": "162.213.1.246",
+            "subscribed": false,
+            "meta": {
+              "company": "Pied Piper",
+              "role": "CEO",
+              "continent": "North America",
+              "country": "United States",
+              "city": "San Jose",
+              "latitude": 37.3008,
+              "longitude": -121.9777,
+              "source": "Lead API"
+            },
+            "tags": [
+              "iPhone User",
+              "Startup"
+            ],
+            "createdAt": "2016-07-23T08:03:18.954Z",
+            "updatedAt": "2016-07-23T08:03:18.954Z"
+          }
+        }', status: 200)
       create_lead(user)
-      expect(WebMock).to have_requested(:post, "api.mailbluster.com/api/leads").
+      expect(WebMock).to have_requested(:post, "api.mailbluster.com/api/leads")
-        with { |req| req.body == "abc" }
     end
   end
 end