import com.thoughtworks.xstream.converters.extended.*;
import org.junit.*;
import static org.junit.Assert.assertEquals;
import org.apache.commons.logging.*;

import java.text.*;
import java.util.*;

public class DateFormattingTest {

    private static final Log log = LogFactory.getLog(DateFormattingTest.class);

    @Test
    public void demonstrateTheFormatOfTheISO8601DateConverter() throws Exception {
        ISO8601DateConverter converter = new ISO8601DateConverter();

        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss Z");
        Date dateInputAsUTC = format.parse("2009-02-17 12:30:22 UTC");

        TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
        log.info("Current default time zone is : " + TimeZone.getDefault().getID());

        String formatted = converter.toString(dateInputAsUTC);

        log.info("formatted: " + formatted);

        assertEquals("2009-02-17T12:30:22.000Z", formatted);
    }

    
    public void listAvailableTimeZones() {
        String[] timeZoneIds = TimeZone.getAvailableIDs();
        StringBuilder sb = new StringBuilder();
        sb.append("\nAvailable TimeZones\n");
        for (String timeZoneId : timeZoneIds) {
            sb.append(timeZoneId).append("\n");
        }
        log.info(sb.toString());
    }
}