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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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/*
 * @test
 * @bug 8149452 8151876 8181157
 * @summary Check the missing time zone names.
 */
import java.text.DateFormatSymbols;
import java.util.ArrayList;
import java.util.TimeZone;
import java.util.Arrays;
import java.util.List;

public class Bug8149452 {

    public static void main(String[] args) {
        // These zone ids are new in tzdb and yet to be reflected in
        // CLDR data. Needs to be excluded from the test.
        // This list is as of CLDR version 29, and should be examined
        // on the CLDR data upgrade.
        List<String> NEW_ZONEIDS = List.of(
                            "America/Punta_Arenas",
                            "Asia/Atyrau",
                            "Asia/Barnaul",
                            "Asia/Famagusta",
                            "Asia/Tomsk",
                            "Europe/Astrakhan",
                            "Europe/Kirov",
                            "Europe/Saratov",
                            "Europe/Ulyanovsk");

        List<String> listNotFound = new ArrayList<>();
        String[][] zoneStrings = DateFormatSymbols.getInstance()
                .getZoneStrings();
        for (String tzID : TimeZone.getAvailableIDs()) {
            if (!Arrays.stream(zoneStrings)
                    .anyMatch(zone -> tzID.equalsIgnoreCase(zone[0]))) {
                // to ignore names for Etc/GMT[+-][0-9]+ which are not supported
                if (!tzID.startsWith("Etc/GMT")
                        && !tzID.startsWith("GMT")
                        && !NEW_ZONEIDS.contains(tzID)) {
                    listNotFound.add(tzID);
                }
            }
        }

        if (!listNotFound.isEmpty()) {
            throw new RuntimeException("Test Failed: Time Zone Strings for "
                    + listNotFound + " not found");
        }

    }

}