https://qafoo.com/blog/107_refactoring_singletons_testability.html
origin - http://www.pipiscrew.com/2017/07/refactoring-singleton-usage-to-get-testable-code/ refactoring-singleton-usage-to-get-testable-code
https://qafoo.com/blog/107_refactoring_singletons_testability.html
origin - http://www.pipiscrew.com/2017/07/refactoring-singleton-usage-to-get-testable-code/ refactoring-singleton-usage-to-get-testable-code