ExcludeSpec nextAll() {
        FACTORY.allOf((0..(1 + random.nextInt(3))).collect { next() } as Set<ExcludeSpec>)
    }

    ExcludeSpec nextArtifact() {
        FACTORY.ivyPatternExclude(randomModuleId(), randomArtifactName(), "*")
    }

    private String randomGroupName() {
        GROUPS[random.nextInt(GROUPS.length)]
    }

    private String randomModuleName() {
        MODULES[random.nextInt(MODULES.length)]