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BAEL-3763: Improvement: Add a section about the ISO_INSTANT formatter (#11537) 

* init commit

* add parsing examples

* Adjust assertEquals order

* Add empty line before asserts
This commit is contained in:
Azhwani 2021-12-13 04:52:38 +01:00 committed by GitHub
parent 17981c9036
commit 389df860a6
1 changed files with 32 additions and 0 deletions
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32
core-java-modules/core-java-datetime-string/src/test/java/com/baeldung/datetime/DateTimeFormatterUnitTest.java
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@ -12,6 +12,7 @@ import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
import java.time.format.FormatStyle;
import java.time.temporal.ChronoUnit;
import java.time.temporal.UnsupportedTemporalTypeException;
import java.util.Locale;
import java.util.TimeZone;
@ -159,4 +160,35 @@ public class DateTimeFormatterUnitTest {
DateTimeFormatter zonedFormatter = DateTimeFormatter.ofPattern("dd.MM.yyyy HH:mm z");
ZonedDateTime.from(zonedFormatter.parse("31.07.2016 14:15"));
}
@Test
public void shouldPrintFormattedZonedDateTime() {
ZonedDateTime zonedDateTime = ZonedDateTime.of(2021, 02, 15, 0, 0, 0, 0, ZoneId.of("Europe/Paris"));
String formattedZonedDateTime = DateTimeFormatter.ISO_INSTANT.format(zonedDateTime);
Assert.assertEquals("2021-02-14T23:00:00Z", formattedZonedDateTime);
}
@Test(expected = UnsupportedTemporalTypeException.class)
public void shouldExpectAnExceptionIfInputIsLocalDateTime() {
DateTimeFormatter.ISO_INSTANT.format(LocalDate.now());
}
@Test
public void shouldParseZonedDateTime() {
DateTimeFormatter formatter = DateTimeFormatter.ISO_INSTANT.withZone(ZoneId.systemDefault());
ZonedDateTime zonedDateTime = ZonedDateTime.parse("2021-10-01T05:06:20Z", formatter);
Assert.assertEquals("2021-10-01T05:06:20Z", DateTimeFormatter.ISO_INSTANT.format(zonedDateTime));
}
@Test(expected = DateTimeParseException.class)
public void shouldExpectAnExceptionIfTimeZoneIsMissing() {
ZonedDateTime zonedDateTime = ZonedDateTime.parse("2021-11-01T05:06:20Z", DateTimeFormatter.ISO_INSTANT);
}
@Test(expected = DateTimeParseException.class)
public void shouldExpectAnExceptionIfSecondIsMissing() {
ZonedDateTime zonedDateTime = ZonedDateTime.parse("2021-12-02T08:06Z", DateTimeFormatter.ISO_INSTANT);
}
}