#428

backend/spec/requests/post_locale_filter_identity_spec.rb

@@ -3,6 +3,7 @@ require 'rails_helper'
 RSpec.describe 'Post filter identity across locales', type: :request do
   include_context 'Ainu locale'
 
+  let!(:activated_locale) { locale }
   let!(:tag) { create(:tag, primary_name: 'legacy_union_source') }
   let!(:external) { create(:external_tag, name: 'shared') }
   let!(:internal_post) { create(:post) }

backend/spec/requests/wiki_locale_spec.rb

@@ -53,14 +53,32 @@ RSpec.describe 'Wiki and native API locale contracts', type: :request do
     expect(response).to have_http_status(:not_found)
   end
 
-  it 'does not disclose another language through ID, existence, diff or history' do
+  it 'resolves a foreign description ID to only the requested language body' do
+    get "/wiki/#{ japanese.id }", params: { locale: 'ain-Kana' }
+    expect(response).to have_http_status(:ok)
+    expect(json).to include('id' => ainu.id, 'body' => 'Ainu body')
+    expect(response.body).not_to include('Japanese body')
+  end
+
+  it 'does not reuse foreign revision IDs when resolving a description' do
+    get "/wiki/#{ japanese.id }", params: {
+        locale: 'ain-Kana', version: current_description_version(japanese).id }
+    expect(response).to have_http_status(:not_found)
+    expect(response.body).not_to include('Japanese body')
+  end
+
+  it 'keeps existence and diff scoped to the specified language and description ID' do
     revision = current_description_version(japanese)
-    ["/wiki/#{ japanese.id }", "/wiki/#{ japanese.id }/exists",
-     "/wiki/#{ japanese.id }/diff"].each do |path|
+    ["/wiki/#{ japanese.id }/exists", "/wiki/#{ japanese.id }/diff"].each do |path|
       get path, params: { locale: 'ain-Kana', from: revision.id }
       expect(response).to have_http_status(:not_found)
       expect(response.body).not_to include('Japanese body')
     end
+    get "/wiki/#{ ainu.id }/exists", params: { locale: 'ain-Kana' }
+    expect(response).to have_http_status(:no_content)
+  end
+
+  it 'keeps history scoped to the requested language without foreign revisions' do
     get '/wiki/changes', params: { locale: 'ain-Kana', id: japanese.id }
     expect(response).to have_http_status(:ok)
     expect(json).to eq([])