if (isDynamicSelector(right) == isDynamicSelector(left)) {
                            Version o1RequiredVersion = ModuleSelectors.this.requiredVersion(right);
                            Version o2RequiredVersion = ModuleSelectors.this.requiredVersion(left);
                            int compareRequiredVersion = versionComparator.compare(o1RequiredVersion, o2RequiredVersion);

import spock.lang.Subject

class ModuleSelectorsTest extends Specification {

    Comparator<Version> versionComparator = new DefaultVersionComparator().asVersionComparator()
    @Subject
    ModuleSelectors selectors = new ModuleSelectors(versionComparator, new VersionParser())
    int dynCount = 1

    def 'empty by default'() {
        expect:
        verifyEmpty(selectors)
    }