FIX: Error when an invalid date is passed to certificate generator.

https://meta.discourse.org/t/broken-image-in-discobot-certificate-with-no-logo-small-url/76594/2

plugins/discourse-narrative-bot/spec/integration/discobot_certificate_spec.rb

@@ -33,18 +33,5 @@ describe "Discobot Certificate" do
         end
       end
     end
-
-    describe 'when date is invalid' do
-      it 'should raise the right error' do
-        expect do
-          get '/discobot/certificate.svg', params: {
-            name: user.name,
-            date: "<script type=\"text/javascript\">alert('This app is probably vulnerable to XSS attacks!');</script>",
-            avatar_url: 'https://somesite.com/someavatar',
-            user_id: user.id
-          }
-        end.to raise_error(ArgumentError, 'invalid date')
-      end
-    end
   end
 end

plugins/discourse-narrative-bot/spec/lib/certificate_generator_spec.rb

@@ -0,0 +1,11 @@
+require 'rails_helper'
+
+RSpec.describe DiscourseNarrativeBot::CertificateGenerator do
+  let(:user) { Fabricate(:user) }
+
+  describe 'when an invalid date is given' do
+    it 'should default to the current date' do
+      expect { described_class.new(user, "2017-00-10") }.to_not raise_error
+    end
+  end
+end