chore: Add logger provider on emit test

logs_sdk/test/opentelemetry/sdk/logs/logger_provider_test.rb

@@ -170,4 +170,18 @@
       end
     end
   end
+
+  describe '#on_emit' do
+    it 'sends the log record to the processors' do
+      mock_log_record = Minitest::Mock.new
+      mock_context = Minitest::Mock.new
+      def mock_context.value(key); OpenTelemetry::Trace::Span::INVALID; end
+
+      logger_provider.add_log_record_processor(mock_log_record_processor)
+      mock_log_record_processor.expect(:on_emit, nil, [mock_log_record, mock_context])
+
+      logger_provider.on_emit(mock_log_record, mock_context)
+      mock_log_record_processor.verify
+    end
+  end
 end