Method TScopedEnvironment

library/cpp/testing/common/scope.h:13–17

    // @note if there was no env variable with given name, it will be set to empty string upon destruction IGNIETFERRO-1486
    struct TScopedEnvironment {
        TScopedEnvironment(const TString& name, const TString& value)
            : PreviousState{1, {name, ::GetEnv(name)}}
        {
            ::SetEnv(name, value);
        }

        TScopedEnvironment(const TVector<std::pair<TString, TString>>& vars)
            : PreviousState(Reserve(vars.size()))