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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. class Tester;
  5. class Tester2;
  6. class blackbox{
  7.     public:
  8.     friend class Tester;
  9.     friend class Tester2;
  10.     bool tes1(){
  11.         return true;
  12.     }
  13.     bool tes2(){
  14.         return true;
  15.         //return false;
  16.     }
  17.     void testall(){
  18.         tes1(),tes2();
  19.     }
  20. };
  21. class Tester1 {
  22. public:
  23.     blackbox obj;
  24.  
  25.     void test() {
  26.         cerr << "check tes1...\n";
  27.         assert((obj.tes1()));
  28.  
  29.         cerr << "check tes2...\n";
  30.         assert((obj.tes2()) ); 
  31.  
  32.         cerr << "All tests passed!\n";
  33.     }
  34. };
  35. class Tester2{
  36.     public:
  37.     blackbox obj;
  38.     void test(){
  39.         if (!obj.tes1()) {
  40.             cerr << "tes1 has a bug\n";
  41.             assert(false);
  42.         } 
  43.         else {
  44.             cerr << "Test 1 works well\n";
  45.         }
  46.  
  47.         if (!obj.tes2()) {
  48.             cerr << "tes2 has a bug\n";
  49.             assert(false);
  50.         } 
  51.         else {
  52.             cerr << "Test 2 works well\n";
  53.         }
  54.     }
  55.  
  56. };
  57. int main(){
  58.     Tester1 t;
  59.     t.test();
  60.     Tester2 t1;
  61.     t1.test();
  62.     return 0;
  63. }
Success #stdin #stdout #stderr 0s 5288KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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check tes1...
check tes2...
All tests passed!
Test 1 works well
Test 2 works well
https://ideone.com/nOnK7c
language:
C++ (gcc 8.3)
created:
292 days ago
visibility:
public

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