I am building some unit tests for detection of validation errors for Xtext-based DSLs. Therefore, I created some files in my DSL with serious errors the validator will find. This works as expected, thanks to xtext-utils. The unit tests are green iff the validated DSL files are red
However, as the validation errors are detected also in my Eclipse environment, my workspace is polluted with error markers which is annoying. Is there a standard (maybe: obvious) solution to mark errors as deliberately?