31 lines
1.0 KiB
Java
31 lines
1.0 KiB
Java
|
package com.baeldung.datetime;
|
||
|
|
|
||
|
|
import static org.assertj.core.api.Assertions.assertThat;
|
||
|
|
|
||
|
|
import java.sql.Timestamp;
|
||
|
|
import java.text.DateFormat;
|
||
|
|
import java.text.SimpleDateFormat;
|
||
|
|
import java.time.Instant;
|
||
|
|
import java.time.ZoneId;
|
||
|
|
import java.util.TimeZone;
|
||
|
|
|
||
|
|
import org.junit.Test;
|
||
|
|
|
||
|
|
public class ConvertInstantToTimestampUnitTest {
|
||
|
|
|
||
|
|
@Test
|
||
|
|
public void givenInstant_whenConvertedToTimestamp_thenGetTimestampWithSamePointOnTimeline() {
|
||
|
|
Instant instant = Instant.now();
|
||
|
|
Timestamp timestamp = Timestamp.from(instant); // same point on the time-line as Instant
|
||
|
|
assertThat(instant.toEpochMilli()).isEqualTo(timestamp.getTime());
|
||
|
|
|
||
|
|
instant = timestamp.toInstant();
|
||
|
|
assertThat(instant.toEpochMilli()).isEqualTo(timestamp.getTime());
|
||
|
|
|
||
|
|
DateFormat df = DateFormat.getDateTimeInstance();
|
||
|
|
df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SS'Z'");
|
||
|
|
df.setTimeZone(TimeZone.getTimeZone("UTC"));
|
||
|
|
assertThat(instant.toString()).isEqualTo(df.format(timestamp).toString());
|
||
|
|
}
|
||
|
|
}
|