Called create_lead in model, FactoryBot errors

spec/factories/users.rb

@@ -80,8 +80,27 @@ FactoryBot.define do
     last_sign_in_at { Date.today }
     is_disabled { false }
 
+    url_mailbluster = 'https://api.mailbluster.com/api/leads/'
+    response_body = "{
+      \"message\": \"Lead created\",
+      \"lead\": {
+        \"id\": 329395,
+        \"firstName\": \"#{name}\",
+        \"lastName\": \"\",
+        \"fullName\": \"#{name}\",
+        \"email\": \"#{email}\",
+        \"subscribed\": true,
+        \"tags\": [
+          #{ENV['OSEM_NAME'] || 'snapcon'}
+        ],
+      }
+    }"
+    WebMock.stub_request(:post, url_mailbluster)
+    # Called by every user creation
+
     after(:create) do |user|
       user.is_admin = false
+
       # save with bang cause we want change in DB and not just in object instance
       user.save!
     end

spec/models/user_spec.rb

@@ -49,7 +49,7 @@
 require 'spec_helper'
 
 describe User do
-
+  
   let(:user_admin) { create(:admin) }
   let(:conference) { create(:conference, short_title: 'oSC16', title: 'openSUSE Conference 2016') }
   let(:conference2) { create(:conference, short_title: 'oSC15', title: 'openSUSE Conference 2015') }
@@ -530,4 +530,41 @@ describe User do
       expect(User.omniauth_providers).to eq [:suse, :google, :facebook, :github, :discourse]
     end
   end
+
+  describe 'mailbluster' do
+    it 'creates a Mailbluster lead on creating a user' do
+      user_mailbluster = User.new(name: 'John Doe', email: 'snap@qwertyuiop.org')
+
+      response_body = "{
+        \"message\": \"Lead created\",
+        \"lead\": {
+          \"id\": 329395,
+          \"firstName\": \"#{user_mailbluster.name}\",
+          \"lastName\": \"\",
+          \"fullName\": \"#{user_mailbluster.name}\",
+          \"email\": \"#{user_mailbluster.email}\",
+          \"subscribed\": true,
+          \"tags\": [
+            #{ENV['OSEM_NAME'] || 'snapcon'}
+          ],
+        }
+      }"
+      stub_request(:post, url_mailbluster)
+        .to_return(body: response_body, status: 200)
+
+      # Do not request before save
+      expect(WebMock).not_to have_requested(:post, url)
+
+      # Request after save
+      user_mailbluster.save!
+
+      expect(WebMock).to have_requested(:post, url).with(body: {
+        'email':            user_mailbluster.email,
+        'firstName':        user_mailbluster.name,
+        'overrideExisting': true,
+        'subscribed':       true,
+        'tags':             [ENV['OSEM_NAME'] || 'snapcon']
+      }.to_json)
+    end
+  end
 end