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Retrieving Unix Time in Java

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michaelin007 2023-11-25 05:25:47 +00:00
parent c519d2be47
commit fa272d3395
1 changed files with 21 additions and 29 deletions
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core-java-modules/core-java-8-datetime-2/src/test/java/com/baeldung/unixtime/UnixTimeUnitTest.java
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package com.baeldung.unixtime; package com.baeldung.unixtime;
import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertEquals;
import java.time.Instant; import java.time.Instant;
import java.time.LocalDate;
import java.time.Month;
import java.time.ZoneId;
import java.util.Date; import java.util.Date;
import org.joda.time.DateTime; import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
import org.junit.jupiter.api.Test; import org.junit.jupiter.api.Test;
public class UnixTimeUnitTest { public class UnixTimeUnitTest {
@Test @Test
public void givenCurrentTimeUsingDateApi_whenConvertedToUnixTime_thenConsistent() { public void givenTimeUsingDateApi_whenConvertedToUnixTime_thenMatch() {
long marginOfError = 1L; Date date = new Date(2023 - 1900, 1, 15, 0, 0, 0);
Date date = new Date(); long expected = 1676419200;
long longTime = date.getTime() / 1000L; long actual = date.getTime() / 1000L;
assertEquals(expected, actual);
for (int i = 0; i < 10; i++) {
long unixTime = System.currentTimeMillis() / 1000L;
assertEquals(longTime, unixTime, marginOfError);
}
} }
@Test @Test
public void givenCurrentTimeUsingInstantNow_whenConvertedToUnixTime_thenConsistent() { public void givenTimeUsingJodaTime_whenConvertedToUnixTime_thenMatch() {
long marginOfError = 1L; DateTime dateTime = new DateTime(2023, 2, 15, 00, 00, 00, 0);
long longTime = Instant.now().getEpochSecond(); long expected = 1676419200;
long actual = dateTime.getMillis() / 1000L;
for (int i = 0; i < 10; i++) { assertEquals(expected, actual);
long unixTime = System.currentTimeMillis() / 1000L;
assertEquals(longTime, unixTime, marginOfError);
}
} }
@Test @Test
public void givenCurrentTimeUsingJodaTime_whenConvertedToUnixTime_thenConsistent() { public void givenTimeUsingLocalDate_whenConvertedToUnixTime_thenMatch() {
long marginOfError = 1L; LocalDate date = LocalDate.of(2023, Month.FEBRUARY, 15);
DateTime dateTime = DateTime.now(DateTimeZone.UTC); Instant instant = date.atStartOfDay().atZone(ZoneId.of("UTC")).toInstant();
long longTime = dateTime.getMillis() / 1000L; long expected = 1676419200;
long actual = instant.getEpochSecond();
for (int i = 0; i < 10; i++) { assertEquals(expected, actual);
long unixTime = System.currentTimeMillis() / 1000L;
assertEquals(longTime, unixTime, marginOfError);
}
} }
} }