chore: custom dynamic & static 500 pages

spec/support/without_detailed_exceptions.rb

@@ -0,0 +1,18 @@
+module WithoutDetailedExceptions
+  RSpec.configure do |config|
+    config.include self, type: :system
+  end
+
+  # Snippet from https://github.com/rspec/rspec-rails/issues/2024
+  def without_detailed_exceptions
+    env_config = Rails.application.env_config
+    original_show_exceptions = env_config['action_dispatch.show_exceptions']
+    original_show_detailed_exceptions = env_config['action_dispatch.show_detailed_exceptions']
+    env_config['action_dispatch.show_exceptions'] = true
+    env_config['action_dispatch.show_detailed_exceptions'] = false
+    yield
+  ensure
+    env_config['action_dispatch.show_exceptions'] = original_show_exceptions
+    env_config['action_dispatch.show_detailed_exceptions'] = original_show_detailed_exceptions
+  end
+end

spec/system/errors_spec.rb

@@ -0,0 +1,29 @@
+describe 'Errors handling', js: false do
+  let(:procedure) { create(:procedure) }
+
+  scenario 'bug renders dynamic 500 page' do
+    procedure.revisions.destroy_all # break procedure
+
+    without_detailed_exceptions do
+      visit commencer_path(path: procedure.path)
+    end
+
+    expect(page).to have_http_status(:internal_server_error)
+    expect(page).to have_content('une erreur est survenue')
+    expect(page).to have_content('Se connecter')
+    expect(page).to have_link('Contactez-nous')
+  end
+
+  scenario 'fatal error fallback to static 500 page' do
+    without_detailed_exceptions do
+      Rails.application.env_config["action_dispatch.cookies"] = "will fail"
+      visit commencer_path(path: procedure.path)
+    ensure
+      Rails.application.env_config.delete("action_dispatch.cookies")
+    end
+
+    expect(page).to have_content('une erreur est survenue')
+    expect(page).not_to have_content('Se connecter')
+    expect(page).to have_link('Contactez-nous')
+  end
+end