}
        if (sampleName != null) {
            return testFile(dirNameFor(sampleName));
        }
        return null;
    }

    /**
     * Shortens path as much as possible to prevent long path issues on Windows
     * by keeping the last segment only, ignoring /groovy or /kotlin suffix.
     */
    @VisibleForTesting
    static String dirNameFor(String sampleName) {

import spock.lang.Specification

class SampleRuleTest extends Specification {

    def "test directory for sample '#sampleName' is '#dirName'"() {

        expect:
        Sample.dirNameFor(sampleName) == dirName

        where:
        sampleName                  | dirName
        "simple"                    | "simple"
        "simple/"                   | "simple"