then:
        Exception exception = thrown()
        // exact exception depends on JDK version
        TestUtil.isOrIsCausedBy(exception, UnrecoverableKeyException.class) or(
            TestUtil.isOrIsCausedBy(exception, SSLHandshakeException.class) or(
                TestUtil.isOrIsCausedBy(exception, IOException.class)))
    }

    def "valid truststore file without specifying password"() {
        given:

                break
            }
            cause = nextCause
        }

        return cause
    }

    static <T extends Throwable> boolean isOrIsCausedBy(Throwable t, Class<T> expectedCauseType) {
        def cause = t
        while (cause != null) {
            if (expectedCauseType.isInstance(cause)) {
                return true
            }