/usr/share/groovy/lib/groovy-test.jar is in groovy 2.4.15-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/groovy/lib/../../maven-repo/org/codehaus/groovy/groovy-test/2.4.15/groovy-test-2.4.15.jar