DEV: amend test for anonymous handling to use real data

Previously we relied on fabrication on anonymous, we can not get the
transaction commit pipeline to work as it does in production, cleanly

This amends it so our anonymous user is created using the core APIs

Signed-off-by: Sam Saffron <sam.saffron@gmail.com>

plugins/discourse-narrative-bot/spec/user_spec.rb

@@ -109,12 +109,17 @@ describe User do
     end
 
     context 'when user is anonymous?' do
-      let(:anonymous_user) { Fabricate(:anonymous) }
-
-      it 'should not initiate the bot' do
+      before do
         SiteSetting.allow_anonymous_posting = true
+      end
 
-        expect { anonymous_user }.to_not change { Post.count }
+      it 'should initiate bot for real user only' do
+
+        user = Fabricate(:user, trust_level: 1)
+        shadow = AnonymousShadowCreator.get(user)
+
+        expect(TopicAllowedUser.where(user_id: shadow.id).count).to eq(0)
+        expect(TopicAllowedUser.where(user_id: user.id).count).to eq(1)
       end
     end