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BAEL-2258 Guide to DateTimeFormatter. Tests added for various formatting patterns and styles

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Dmytro Korniienko 2018-10-01 10:17:39 +03:00
parent 5252c5f6e7
commit f9065d21b7
1 changed files with 69 additions and 0 deletions
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69
core-java-8/src/test/java/com/baeldung/internationalization/DateTimeFormatterUnitTest.java
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@ -3,11 +3,14 @@ package com.baeldung.internationalization;
import org.junit.Assert;
import org.junit.Test;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.time.format.FormatStyle;
import java.time.temporal.ChronoUnit;
import java.util.Locale;
import java.util.TimeZone;
@ -43,4 +46,70 @@ public class DateTimeFormatterUnitTest {
Assert.assertEquals("Monday, January 1, 2018 10:15:50 AM PST", formattedDateTime);
Assert.assertEquals("lundi 1 janvier 2018 10 h 15 PST", frFormattedDateTime);
}
@Test
public void shoulPrintFormattedDate() {
String europeanDatePattern = "dd.MM.yyyy";
DateTimeFormatter europeanDateFormatter = DateTimeFormatter.ofPattern(europeanDatePattern);
LocalDate summerDay = LocalDate.of(2016, 7, 31);
Assert.assertEquals("31.07.2016", europeanDateFormatter.format(summerDay));
}
@Test
public void shouldPrintFormattedTime24() {
String timeColonPattern = "HH:mm:ss";
DateTimeFormatter timeColonFormatter = DateTimeFormatter.ofPattern(timeColonPattern);
LocalTime colonTime = LocalTime.of(17, 35, 50);
Assert.assertEquals("17:35:50", timeColonFormatter.format(colonTime));
}
@Test
public void shouldPrintFormattedTimeWithMillis() {
String timeColonPattern = "HH:mm:ss SSS";
DateTimeFormatter timeColonFormatter = DateTimeFormatter.ofPattern(timeColonPattern);
LocalTime colonTime = LocalTime.of(17, 35, 50).plus(329, ChronoUnit.MILLIS);
Assert.assertEquals("17:35:50 329", timeColonFormatter.format(colonTime));
}
@Test
public void shouldPrintFormattedTimePM() {
String timeColonPattern = "hh:mm:ss a";
DateTimeFormatter timeColonFormatter = DateTimeFormatter.ofPattern(timeColonPattern);
LocalTime colonTime = LocalTime.of(17, 35, 50);
Assert.assertEquals("05:35:50 PM", timeColonFormatter.format(colonTime));
}
@Test
public void shouldPrintFormattedUTCRelatedZonedDateTime() {
String newYorkDateTimePattern = "dd.MM.yyyy HH:mm z";
DateTimeFormatter newYorkDateFormatter = DateTimeFormatter.ofPattern(newYorkDateTimePattern);
LocalDateTime summerDay = LocalDateTime.of(2016, 7, 31, 14, 15);
Assert.assertEquals("31.07.2016 14:15 UTC-04:00", newYorkDateFormatter.format(ZonedDateTime.of(summerDay, ZoneId.of("UTC-4"))));
}
@Test
public void shouldPrintFormattedNewYorkZonedDateTime() {
String newYorkDateTimePattern = "dd.MM.yyyy HH:mm z";
DateTimeFormatter newYorkDateFormatter = DateTimeFormatter.ofPattern(newYorkDateTimePattern);
LocalDateTime summerDay = LocalDateTime.of(2016, 7, 31, 14, 15);
Assert.assertEquals("31.07.2016 14:15 EDT", newYorkDateFormatter.format(ZonedDateTime.of(summerDay, ZoneId.of("America/New_York"))));
}
@Test
public void shouldPrintStyledDate() {
LocalDate anotherSummerDay = LocalDate.of(2016, 8, 23);
Assert.assertEquals("Tuesday, August 23, 2016", DateTimeFormatter.ofLocalizedDate(FormatStyle.FULL).format(anotherSummerDay));
Assert.assertEquals("August 23, 2016", DateTimeFormatter.ofLocalizedDate(FormatStyle.LONG).format(anotherSummerDay));
Assert.assertEquals("Aug 23, 2016", DateTimeFormatter.ofLocalizedDate(FormatStyle.MEDIUM).format(anotherSummerDay));
Assert.assertEquals("8/23/16", DateTimeFormatter.ofLocalizedDate(FormatStyle.SHORT).format(anotherSummerDay));
}
@Test
public void shouldPrintStyledDateTime() {
LocalDateTime anotherSummerDay = LocalDateTime.of(2016, 8, 23, 13, 12, 45);
Assert.assertEquals("Tuesday, August 23, 2016 1:12:45 PM EET", DateTimeFormatter.ofLocalizedDateTime(FormatStyle.FULL).withZone(ZoneId.of("Europe/Helsinki")).format(anotherSummerDay));
Assert.assertEquals("August 23, 2016 1:12:45 PM EET", DateTimeFormatter.ofLocalizedDateTime(FormatStyle.LONG).withZone(ZoneId.of("Europe/Helsinki")).format(anotherSummerDay));
Assert.assertEquals("Aug 23, 2016 1:12:45 PM", DateTimeFormatter.ofLocalizedDateTime(FormatStyle.MEDIUM).withZone(ZoneId.of("Europe/Helsinki")).format(anotherSummerDay));
Assert.assertEquals("8/23/16 1:12 PM", DateTimeFormatter.ofLocalizedDateTime(FormatStyle.SHORT).withZone(ZoneId.of("Europe/Helsinki")).format(anotherSummerDay));
}
}