SonarQube warning "Insufficient branch coverage by unit tests"

Question

Does anybody knows about this issue “Insufficient branch coverage by unit tests”? My class code coverage is 99% but I am keep getting sonar warning for that same class “Insufficient branch coverage by unit tests : 111 more branches need to be covered by unit tests to reach the minimum threshold of 65.0% branch coverage.” Normally this error occurred due to Insufficient coverage of if/else condition as we have to handle positive/negative both scenarios. Does anybody knows anything else about this warning?

Thanks Sach

Answer 1

This means that you have branches in your code that are not covered.

For instance :

boolean foo() {
  return a || b || c; 
}

if in your tests you always have a that is true, then you are covering the line indeed but not all the branches possible.

Please also watch out for try with resources as this generates a lot of branches in bytecode (and you don't see them in source) and you are most probably not covering all of them.