test/jdk/java/util/Calendar/JapaneseLenientEraTest.java

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/*
 * @test
 * @bug 8206120
 * @summary Test whether lenient era is accepted in JapaneseImperialCalendar
 * @run testng/othervm JapaneseLenientEraTest
 */

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;

import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
import static org.testng.Assert.assertEquals;

@Test
public class JapaneseLenientEraTest {

    @DataProvider(name="lenientEra")
    Object[][] names() {
        return new Object[][] {
            // lenient era/year, strict era/year
            { "Meiji 123", "Heisei 2" },
            { "Sh\u014dwa 65", "Heisei 2" },
            { "Heisei 32", "Reiwa 2" },
        };
    }

    @Test(dataProvider="lenientEra")
    public void testLenientEra(String lenient, String strict) throws Exception {
        Calendar c = new Calendar.Builder()
            .setCalendarType("japanese")
            .build();
        DateFormat df = new SimpleDateFormat("GGGG y-M-d", Locale.ROOT);
        df.setCalendar(c);
        Date lenDate = df.parse(lenient + "-01-01");
        df.setLenient(false);
        Date strDate = df.parse(strict + "-01-01");
        assertEquals(lenDate, strDate);
    }
}