normalise the message in the response

app/controllers/discourse_donations/charges_controller.rb

@@ -8,9 +8,7 @@ module DiscourseDonations
 
     def create
       if email.nil?
-        response = {
-
-        }
+        response = {'message' => 'Please enter your email address'}
       else
         Stripe.api_key = SiteSetting.discourse_donations_secret_key
         currency = SiteSetting.discourse_donations_currency
@@ -26,6 +24,8 @@ module DiscourseDonations
           :description => SiteSetting.discourse_donations_description,
           :currency    => currency
         )
+
+        response['message'] = response['outcome']['seller_message']
       end
 
       render :json => response

assets/javascripts/discourse/components/stripe-card.js.es6

@@ -87,7 +87,7 @@ export default Ember.Component.extend({
 
           if(!self.get('paymentSuccess')) {
             ajax('/charges', { data: params, method: 'post' }).then(data => {
-              self.set('result', data.outcome.seller_message);
+              self.set('result', data.message);
 
               if(!this.get('create_accounts')) {
                 if(data.status == 'succeeded') { this.setSuccess() };

spec/controllers/discourse_donations/charges_controller_spec.rb

@@ -4,6 +4,7 @@ require_relative '../../support/dd_helper'
 module DiscourseDonations
   RSpec.describe ChargesController, type: :controller do
     routes { DiscourseDonations::Engine.routes }
+    let(:body) { JSON.parse(response.body) }
 
     before do
       SiteSetting.stubs(:discourse_donations_secret_key).returns('secret-key-yo')
@@ -11,17 +12,20 @@ module DiscourseDonations
 
     it 'responds ok for anonymous users' do
       post :create, { email: 'foobar@example.com' }
+      expect(body['message']).to eq(body['outcome']['seller_message'])
       expect(response).to have_http_status(200)
     end
 
     it 'responds ok when the email is empty' do
       post :create, { }
+      expect(body['message']).to eq('Please enter your email address')
       expect(response).to have_http_status(200)
     end
 
     it 'responds ok for logged in user' do
       current_user = log_in(:coding_horror)
       post :create
+      expect(body['message']).to eq(body['outcome']['seller_message'])
       expect(response).to have_http_status(200)
     end
   end