Add comprehensive unit test coverage for controllers, models, and services

- Translate French comments to English in controllers and tests
- Fix test failures: route helpers, validations, MySQL transaction issues
- Add Timecop for time-dependent tests and update database config for isolation

test/controllers/promoter/events_controller_test.rb

@@ -0,0 +1,30 @@
+require "test_helper"
+
+class Promoter::EventsControllerTest < ActionDispatch::IntegrationTest
+  setup do
+    @promoter = User.create!(email: "promoter@example.com", password: "password123", password_confirmation: "password123", is_professionnal: true, onboarding_completed: true)
+    @event = Event.create!(name: "Test Event", slug: "test-event", description: "A valid description for the test event that is long enough to meet the minimum character requirement", latitude: 48.8566, longitude: 2.3522, venue_name: "Venue", venue_address: "Address", user: @promoter, start_time: 1.week.from_now, end_time: 1.week.from_now + 3.hours, state: :draft)
+  end
+
+  test "should require authentication for index" do
+    get promoter_events_path
+    assert_redirected_to new_user_session_path
+  end
+
+  test "should get index for authenticated promoter" do
+    sign_in @promoter
+    get promoter_events_path
+    assert_response :success
+  end
+
+  test "should show promoter's events only" do
+    sign_in @promoter
+    other_event = Event.create!(name: "Other Event", slug: "other", description: "Valid description for the event", latitude: 48.0, longitude: 2.0, venue_name: "V", venue_address: "A", user_id: users(:one).id, start_time: 1.day.from_now, end_time: 2.days.from_now, state: :draft)
+    get promoter_events_path
+    assert_response :success
+    assert_includes assigns(:events), @event
+    assert_not_includes assigns(:events), other_event
+  end
+
+  # Add tests for new, create, etc. as needed
+end