How do I ignore scanning certain classes using EclEmma and Eclipse?

Question

I am using EclEmma (inside of Eclipse) to scan my JUnit code coverage. This works correctly - however, I do not want EclEmma to scan my src/view folder since it contains Swing code that I consider not worthy of testing.

Is there any way to ignore this folder when EclEmma runs so that it: a) runs faster, and b) does not skew the coverage percentage?

EDIT:

My project's structure is:

src/view
src/model
src/controller

I have tried these (possibly others) with the Path Entries section in the Preferences page:

"src/view"
"src/view/*"
"view"
"view/*"
src/view

These are using the Excludes section in the Preferences page:

*
*View*
*View*.class
src/view/*View*
src/view/*View*.class

They all leave me with the same result of it analysing my entire src folder.

Answer 1

You can specify an exclude field:

Excludes: A list of class names that should be excluded from execution analysis. The list entries are separated by a colon (:) and may use wildcard characters (* and ?). (Default: empty)

However, it might be easier to use their options for classpath matching:

Only path entries matching: Comma separated list of strings that must match with the class path entry. A class path entry matches the filter, if it contains one of the given strings. (e.g. "src/main/java", Default: no filter)

See eclemma - how to ignore source about how to ignore src folders.

Also please note their caution,

Warning: If your settings do not match any of the class path entries in your project(s), every new launch in coverage mode will have an empty analysis scope.

Answer 2

[Edit] The maintainers says you cannot, except one the source directory level: https://github.com/jacoco/eclemma/issues/70

I thought eclemma wasn't excluding files: it is. Just not as I thought.

When you go into excludes in preferences and specify your.classes.here.*, for example, that means those classes won't count towards your getting all your code covered, not that those classes won't be included in what needs to be covered by tests.

Try it and see. Try to exclude a class you know have coverage in it. Once you put that to the excludes preference, on a new coverage run they'll still be there in the coverage window, but they'll come up as 0% and will all be in red.

Rather useless if you ask me. I'm still searching for an adequate solution to exclude classes by name from the classes that need to be covered by tests.

Answer 3

I have given up on EclEmma because I can't get it to do the things I want it to do, so I use a different method - I'll document it here in case it helps anyone else.

1. To exclude classes from test, I name all my test classes as *Case.java and then include or exclude them via SuiteClasses. You can read more about that at https://github.com/junit-team/junit4/wiki/Aggregating-tests-in-suites
2. To measure coverage, I use Maven and Cobertura. This will test just the files specified in my test suites and produce coverage reports accordingly.