test for logged out maps GET api

app/models/map.rb

@@ -87,7 +87,7 @@ class Map < ApplicationRecord
   end
 
   def starred_by_user?(user)
-    user&.stars&.where(map: self)&.exists?
+    user&.stars&.where(map: self)&.exists? || false # return false, not nil
   end
 
   def as_json(_options = {})

spec/api/v2/maps_api_spec.rb

@@ -22,6 +22,16 @@ RSpec.describe 'maps API', type: :request do
     expect(response).to match_json_schema(:map)
     expect(JSON.parse(response.body)['data']['id']).to eq map.id
   end
+  
+  describe 'logged out' do
+    it 'GET commons map' do
+      get "/api/v2/maps/#{map.id}"
+
+      expect(response).to have_http_status(:success)
+      expect(response).to match_json_schema(:map)
+      expect(JSON.parse(response.body)['data']['id']).to eq map.id
+    end
+  end
 
   it 'POST /api/v2/maps' do
     post '/api/v2/maps', params: { map: map.attributes, access_token: token }