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javaeclipsecode-coverageeclemma

Eclemma says 1 of 4 branches not covered, but which branch is it?

Is there a simple way to tell which branch I am missing? I.e. I have some code like this:

if (x || y) {
    // do stuff
}

In the coverage highlighting there is a yellow dot in Eclipse that says:

1 of 4 branches missed

but I would like to know which branch is missing.

Solution

  • An open issue on the github repo for Eclemma's parent, jacoco, suggests that such a feature would actually be a bit difficult to include.

    However, even without an Eclemma feature, if the goal is just to figure out the branches missed in a specific case, you could instrument your code to keep track. The simplest example is old fashioned print statements:

    if (x || y) {
    System.out.println("BRANCH: " + x + ", " + y);
    // Do stuff
}

    Then look at the output and see what branches you actually hit (e.g. java ... | grep "BRANCH:" | sort | uniq). (not terribly satisfying, I know.)