given:
        def cleanupAction = new WrapperDistributionCleanupAction(executer.gradleUserHomeDir, Stub(UsedGradleVersions))

        when:
        def gradleVersion = cleanupAction.determineGradleVersionFromDistribution(executer.distribution.gradleHomeDir)

        then:
        gradleVersion == GradleVersion.current()
    }

        Preconditions.checkArgument(subDirs.size() == 1, "A Gradle distribution must contain exactly one subdirectory: %s", subDirs);
        return determineGradleVersionFromDistribution(single(subDirs));
    }

    @VisibleForTesting
    protected GradleVersion determineGradleVersionFromDistribution(File distributionHomeDir) throws Exception {
        List<File> checkedJarFiles = new ArrayList<File>();