(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;
}
