#include <memory>

 #include <iostream>

 #include "user.h"
 #include "test_util.h"

 bool gets_home_directory()
 {

     //given
     const char *expected_home_directory = "home/msmith";
     struct passwd test_passwd;

     test_passwd.pw_dir = const_cast<char *> (expected_home_directory);
     user test_user (&test_passwd);

 
     //when
     std::string actual_home_directory = test_user.home_directory();
 
     //then

     check (expected_home_directory == actual_home_directory,
            "directories do not match");

     return expected_home_directory == actual_home_directory;
 }
 

 std::shared_ptr<struct passwd> fake_passwd;

 int fake_getpwnam_r (const char *nam, struct passwd *pwd, char *buffer,
                      size_t bufsize, struct passwd **result)

 {
     if (fake_passwd) {
         *pwd = *fake_passwd;
         *result = pwd;
         return 0;
     }

     return -1;

 }
 

 bool create_user_succeeds()
 {

     // given

     std::string username ("msmith");
     std::string home_directory ("this is my home");
     fake_passwd.reset (new struct passwd);
     fake_passwd->pw_dir = const_cast<char *> (home_directory.c_str());

 
     // when

     std::shared_ptr<user> user (create_user (username));

 
     // then

     check (user, "user should be returned");
     check (user->home_directory() == home_directory,
            "home directory does not match");

 
     succeed();
 
 }
 

 bool create_user_nonexistent()
 {

     // given

     std::string username ("msmith");

 
     // when

     std::shared_ptr<user> user (create_user (username));

 
     // then

     check (!user, "no user should be returned");

 
     succeed();
 }
 

 RESET_VARS_START

 fake_passwd.reset ((struct passwd *)0);

 RESET_VARS_END
 

 int run_tests()
 {

     test (gets_home_directory);
     test (create_user_succeeds);
     test (create_user_nonexistent);

     succeed();
 }

 int main (int argc, char *argv[])

 {

     return !run_tests();
 }