Method roundtrip

base/src/test/java/net/time4j/calendar/NengoTest.java:282–295

(Object obj)

    }

    private static int roundtrip(Object obj)
        throws IOException, ClassNotFoundException {

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(baos);
        oos.writeObject(obj);
        byte[] data = baos.toByteArray();
        oos.close();
        ByteArrayInputStream bais = new ByteArrayInputStream(data);
        ObjectInputStream ois = new ObjectInputStream(bais);
        assertThat(ois.readObject() == obj, is(true)); // identity check
        ois.close();
        return data.length;
    }

    private static PlainDate convert(String date) {
        String[] components = date.split("-");