Add JSON file extension to fixtures

spec/frontend/cycle_analytics/mock_data.js

@@ -21,9 +21,10 @@ export const getStageByTitle = (stages, title) =>
   stages.find((stage) => stage.title && stage.title.toLowerCase().trim() === title) || {};
 
 const fixtureEndpoints = {
-  customizableCycleAnalyticsStagesAndEvents: 'projects/analytics/value_stream_analytics/stages',
-  stageEvents: (stage) => `projects/analytics/value_stream_analytics/events/${stage}`,
-  metricsData: 'projects/analytics/value_stream_analytics/summary',
+  customizableCycleAnalyticsStagesAndEvents:
+    'projects/analytics/value_stream_analytics/stages.json',
+  stageEvents: (stage) => `projects/analytics/value_stream_analytics/events/${stage}.json`,
+  metricsData: 'projects/analytics/value_stream_analytics/summary.json',
 };
 
 export const metricsData = getJSONFixture(fixtureEndpoints.metricsData);

spec/frontend/fixtures/analytics.rb

@@ -22,7 +22,7 @@ RSpec.describe 'Analytics (JavaScript fixtures)', :sidekiq_inline do
       sign_in(user)
     end
 
-    it 'projects/analytics/value_stream_analytics/stages' do
+    it 'projects/analytics/value_stream_analytics/stages.json' do
       get(:index, params: params, format: :json)
 
       expect(response).to be_successful
@@ -40,7 +40,7 @@ RSpec.describe 'Analytics (JavaScript fixtures)', :sidekiq_inline do
     end
 
     Gitlab::Analytics::CycleAnalytics::DefaultStages.all.each do |stage|
-      it "projects/analytics/value_stream_analytics/events/#{stage[:name]}" do
+      it "projects/analytics/value_stream_analytics/events/#{stage[:name]}.json" do
         get(stage[:name], params: params, format: :json)
 
         expect(response).to be_successful
@@ -58,7 +58,7 @@ RSpec.describe 'Analytics (JavaScript fixtures)', :sidekiq_inline do
       sign_in(user)
     end
 
-    it "projects/analytics/value_stream_analytics/summary" do
+    it "projects/analytics/value_stream_analytics/summary.json" do
       get(:show, params: params, format: :json)
 
       expect(response).to be_successful