(Sorry for my english) I'm trying to make a unit test from a code of c++. In the next function (menu) there aren't any parameter into (). But into this funciton there are a scanf,that i would like testing but I haven't any idea how to make it.
Can I test scanf from Unit Test?
Thank you.
Code from function:
void principal::menu()
{
int choice;
system("cls");
printf("\n--------MENU--------");
printf("\n1 : Jugador X");
printf("\n2 : Jugador O");
printf("\n3 : Sortir");
printf("\nTria el tipus de jugador: ");
scanf_s("%d", &choice);
turn = 1;
switch (choice)
{
case 1:
player = 1;
comp = 0;
player_first();
break;
case 2:
player = 0;
comp = 1;
start_game();
break;
case 3:
exit(1);
default:
menu();
}
}
Code from test:
...
TEST_METHOD(menu){
principal p; //this is the class --> not matter now
//test code
}
If the code have a parameter I use the next code:
...
TEST_METHOD(menu){
principal p; //this is the class --> not matter now
//test code
Assert::AreEqual(result, parameter to enter);
}
1 Answer
If you use the C++ functions cin and cout you can redirect the buffer.
E.g.
#include <iostream>
#include <sstream>
#include <random>
#include <ctime>
int main()
{
auto cout_buf = std::cout.rdbuf();
std::stringbuf sb;
std::cin.rdbuf(&sb);
std::cout.rdbuf(&sb);
std::mt19937 rand(time(nullptr));
std::cout << (rand() % 100);
int number;
std::cin >> number;
std::cout.rdbuf(cout_buf);
std::cout << "The number was " << number << std::endl;
return 0;
}
