Spec HomeHelper (#3415)

spec/helpers/home_helper_spec.rb

 require 'rails_helper'
 
 RSpec.describe HomeHelper, type: :helper do
-
+  describe 'default_props' do
+    it 'returns default properties according to the context' do
+      expect(helper.default_props).to eq locale: :en
+    end
+  end
 end