#include<string> #include<memory> #include<utility>structilogger{virtual~ilogger(){}; virtualvoidlog(const std::string&) = 0}; structilogic{virtual~ilogic(){}; virtualvoiddo_it() = 0}; classexample{public:example(const std::shared_ptr<ilogger>& logger , std::unique_ptr<ilogic> logic , const std::string& text) : logger_(logger) , logic_(std::move(logic)) , text_(text){} intrun(){logic_->do_it(); logger_->log(text_); return0} private: std::shared_ptr<ilogger> logger_; std::unique_ptr<ilogic> logic_; std::string text_}; #include<mocks_injector.hpp>intmain(){namespacedi= boost::di; //1. create mocks injector and example classauto _ = di::make_injector<di::mocks_provider>(); //2. set up expectationsEXPECT_CALL(_, ilogic::do_it); EXPECT_CALL(_, ilogger::log).With("hello world"); //3. run tests example sut{_, _, "hello world"}; assert(0 == sut.run())}

structlogic : ilogic{voiddo_it() override{} }; classapp{public:app(std::shared_ptr<example> e) : example_(e){} intrun(){return example_->run()} private: std::shared_ptr<example> example_}; #include<mocks_injector.hpp>intmain(){namespacedi= boost::di; //1. create mocks injector with dependenciesauto mi = di::make_injector<di::mocks_provider>( di::bind<std::string>.to("hello world") , di::bind<ilogic, logic> // inject real logic ); //2. set up expectationsEXPECT_CALL(mi, ilogger::log).With("hello world"); //3. create example class and run itassert(!mi.create<app>().run())}