test/jdk/java/util/Calendar/bug4401223.java

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/*
 * @test
 * @bug 4401223
 * @summary Make sure that GregorianCalendar doesn't cause
 *          IllegalArgumentException at some special situations which are
 *          related to the Leap Year.
 * @run junit bug4401223
 */

import java.util.Date;
import java.util.GregorianCalendar;

import static java.util.GregorianCalendar.DATE;
import static java.util.GregorianCalendar.DAY_OF_YEAR;
import static java.util.GregorianCalendar.DECEMBER;
import static java.util.GregorianCalendar.FEBRUARY;
import static java.util.GregorianCalendar.MONTH;
import static java.util.GregorianCalendar.YEAR;

import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
import static org.junit.jupiter.api.Assertions.assertEquals;

public class bug4401223 {

    // Ensure IAE not thrown for date: 12-29-00
    @SuppressWarnings("deprecation")
    @Test
    public void checkExceptionTest() {
        Date date = new Date(2000 - 1900, FEBRUARY, 29);
        GregorianCalendar gc = new GregorianCalendar();
        assertDoesNotThrow(() -> {
            gc.setTime(date);
            gc.setLenient(false);
            gc.set(YEAR, 2001);
        }, "Exception occurred for 2/29/00 & set(YEAR,2001)");
    }

    // Ensure IAE not thrown for date: 12-31-00. Validate expected values.
    @SuppressWarnings("deprecation")
    @Test
    public void checkExceptionAndValuesTest() {
        Date date = new Date(2000 - 1900, DECEMBER, 31);
        GregorianCalendar gc = new GregorianCalendar();
        assertDoesNotThrow(() -> {
            gc.setTime(date);
            gc.setLenient(false);
            gc.set(YEAR, 2001);
        }, "Exception occurred for 12/31/00 & set(YEAR,2001)");

        String errMsg = "Wrong date,  got: " + gc.getTime();

        assertEquals(2001, gc.get(YEAR), errMsg);
        assertEquals(DECEMBER, gc.get(MONTH), errMsg);
        assertEquals(31, gc.get(DATE), errMsg);
        assertEquals(365, gc.get(DAY_OF_YEAR), errMsg);
    }
}