How to exempt lombok generated code from Jacoco

Lombok makes life easier for java developers by generating the mundane code (e.g. getters and setters) automatically, but if you are running code coverage, your score will suffer because there aren’t any unit tests for the ungenerated code.

To resolve this, simply add a new file named lombok.config to your root directory with the following

config.stopBubbling = true
lombok.addLombokGeneratedAnnotation = true

The first config.stopBubbling = true tells Lombok not to look in the parent directory for configuration files. This is so because you can have the lombok config files in your hierarchy of folders, and the config files in the deeper folders can inherit the configurations from its ancestor folders and overwrite them. This configuration is false by default and it’s a good practice to set it to true in the configuration of the root folder.

The second configuration lombok.addLombokGeneratedAnnotation = true will add the @Lombok.Generated annotation to the code it generated, and code coverage tools like Jacoco will skip those autogenerated code, so your code coverage score will not suffer, as there aren’t unit tests for these generated codes and you shouldn’t be wasting your time to write them either.

And after cleaning, building, and running code coverage again, your report should have a better score.