Module: Add TestModule for dependency injection

  // Stop all running modules in reverse order of start

  void StopAll();

 private:

 protected:

  Module* Get(const ModuleFactory* module) const;

  std::map<const ModuleFactory*, Module*> started_modules_;

  std::vector<const ModuleFactory*> start_order_;

};

class TestModuleRegistry : public ModuleRegistry {

 public:

  void InjectTestModule(const ModuleFactory* module, Module* instance) {

    start_order_.push_back(module);

    started_modules_[module] = instance;

  }

  Module* GetModuleUnderTest(const ModuleFactory* module) const {

    return Get(module);

  }

};

}  // namespace bluetooth