path coverage vs branch coverage vs line coverage

[lefticus]

Also watch these videos by Jorgen.

https://www.youtube.com/watch?v=kkAsakZCCAY

void func(bool a, bool b){
 int *ptr = nullptr;
 
 if (a){
 ptr = new int(42);
 }

 if (b){
 delete ptr;
 }
}


void test_1(){
 func(false, false); // 2 uncovered lines, 50% branch coverage, 25% path coverage
}


void test_2(){
 // these stats are true by themselves
 func(true, true); // 100% line coverage 50% branch coverage, 25% path coverage
}

void test_3(){
 func(false, false);
 func(true, true);
 // now we have 100% branch coverage and 50% path coverage and still a resource leak
}

void test_4(){
 func(false, true);
 func(false, false);
 func(true, false); // only this one exposes the memory leak
 func(true, true);
 // finally 100% of all 3 categories

[fcolecumberri]

why test_3 has a resource leak?

[LB--]

@fcolecumberri That specific function doesn't exhibit the resource leak, but if you exclude the rest of the code after that function, the resource leak has not yet been found in testing the various combinations so far, hence there is still an undiscovered resource leak.