Fix translation helpers to support ruby 3

spec/telegram/bot/updates_controller/translation_spec.rb

@@ -1,5 +1,26 @@
 RSpec.describe Telegram::Bot::UpdatesController::Translation do
+  def self.stub_translations(translations)
+    around do |ex|
+      backend = I18n.backend
+      I18n.backend = I18n::Backend::Simple.new
+      begin
+        I18n.backend.store_translations 'en', telegram: {webhooks: translations}
+        ex.run
+      ensure
+        I18n.backend = backend
+      end
+    end
+  end
+  let(:result) { double(:result) }
+
   describe '#translate' do
+    stub_translations(
+      start: {
+        hello: 'Hello from start!',
+        hi: 'Hi %{name} from start', # rubocop:disable Style/FormatStringToken
+      },
+    )
+
     let(:controller) do
       double(
         controller_path: 'telegram/webhooks',
@@ -10,12 +31,28 @@ RSpec.describe Telegram::Bot::UpdatesController::Translation do
     it 'uses action_name without ! for lazy translations' do
       expect(I18n).to receive(:translate).with('telegram.webhooks.start.hello',
         default: [:'telegram.webhooks.hello'],
-      )
-      controller.t('.hello')
+      ) { result }
+      expect(controller.t('.hello')).to eq(result)
+
+      expect(I18n).to receive(:translate).with('telegram.webhooks.start.hi',
+        default: [:'telegram.webhooks.hi'],
+        name: 'Dude',
+      ) { result }
+      expect(controller.t('.hi', name: 'Dude')).to eq(result)
+    end
+
+    it 'translates' do
+      expect(controller.t('.hello')).to eq('Hello from start!')
+      expect(controller.t('.hi', name: 'Dude')).to eq('Hi Dude from start')
     end
   end
 
   describe described_class::ClassMethods do
+    stub_translations(
+      hello: 'Hello!',
+      hi: 'Hi %{name}', # rubocop:disable Style/FormatStringToken
+    )
+
     describe '#translate' do
       let(:controller_class) do
         double(controller_path: 'telegram/webhooks').
@@ -23,8 +60,20 @@ RSpec.describe Telegram::Bot::UpdatesController::Translation do
       end
 
       it 'uses controller_path for lazy translations' do
-        expect(I18n).to receive(:translate).with('telegram.webhooks.hello', {})
-        controller_class.t('.hello')
+        expect(I18n).to receive(:translate) do |*args, **kwargs|
+          # not using .with to support ruby 2.x and 3.x
+          expect([*args, kwargs]).to eq(['telegram.webhooks.hello', {}])
+          result
+        end
+        expect(controller_class.t('.hello')).to eq(result)
+
+        expect(I18n).to receive(:translate).with('telegram.webhooks.hi', name: 'Dude') { result }
+        expect(controller_class.t('.hi', name: 'Dude')).to eq(result)
+      end
+
+      it 'translates' do
+        expect(controller_class.t('.hello')).to eq('Hello!')
+        expect(controller_class.t('.hi', name: 'Dude')).to eq('Hi Dude')
       end
     end
   end