ClockTest.java

package net.time4j.calendar;

import net.time4j.PlainDate;
import net.time4j.PlainTimestamp;
import net.time4j.ZonalClock;
import net.time4j.base.TimeSource;
import net.time4j.engine.StartOfDay;
import net.time4j.tz.ZonalOffset;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;


@RunWith(JUnit4.class)
public class ClockTest {

    private static final ZonalClock CLOCK;

    static {
        TimeSource<?> clock = () -> PlainTimestamp.of(2015, 7, 17, 18, 1).atUTC();
        CLOCK = new ZonalClock(clock, ZonalOffset.UTC);
    }

    @Test
    public void startAtMidnight() {
        assertThat(
            CLOCK.now(HijriCalendar.family(), HijriCalendar.VARIANT_UMALQURA, StartOfDay.MIDNIGHT).toString(),
            is("AH-1436-10-01[islamic-umalqura]T18:01"));
    }

    @Test
    public void startInEvening() {
        assertThat(
            CLOCK.now(
                HijriCalendar.family(),
                HijriCalendar.VARIANT_UMALQURA,
                StartOfDay.ofFixedDeviation(-21600 + 60)
            ).toString(),
            is("AH-1436-10-02[islamic-umalqura]T18:01"));
    }

    @Test
    public void nowInSystemTime() {
        assertThat(
            HijriCalendar.nowInSystemTime(
                HijriCalendar.VARIANT_UMALQURA,
                StartOfDay.MIDNIGHT
            ).transform(PlainDate.class),
            is(PlainDate.nowInSystemTime()));
        System.out.println(CopticCalendar.nowInSystemTime());
        System.out.println(EthiopianCalendar.nowInSystemTime());
        System.out.println(HijriCalendar.nowInSystemTime(HijriAlgorithm.WEST_ISLAMIC_CIVIL, StartOfDay.EVENING));
        System.out.println(JulianCalendar.nowInSystemTime());
        System.out.println(MinguoCalendar.nowInSystemTime());
        System.out.println(PersianCalendar.nowInSystemTime());
        System.out.println(ThaiSolarCalendar.nowInSystemTime());
    }

}