diff --git a/core-java-8/src/test/java/com/baeldung/internationalization/DateTimeFormatterUnitTest.java b/core-java-8/src/test/java/com/baeldung/internationalization/DateTimeFormatterUnitTest.java index 4d95bc82e1..36a5f6210b 100644 --- a/core-java-8/src/test/java/com/baeldung/internationalization/DateTimeFormatterUnitTest.java +++ b/core-java-8/src/test/java/com/baeldung/internationalization/DateTimeFormatterUnitTest.java @@ -3,11 +3,15 @@ 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.DateTimeParseException; import java.time.format.FormatStyle; +import java.time.temporal.ChronoUnit; import java.util.Locale; import java.util.TimeZone; @@ -43,4 +47,112 @@ 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 shouldPrintFormattedDate() { + 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)); + } + + @Test + public void shouldPrintFormattedDateTimeWithPredefined() { + Assert.assertEquals("2018-03-09", DateTimeFormatter.ISO_LOCAL_DATE.format(LocalDate.of(2018, 3, 9))); + Assert.assertEquals("2018-03-09-03:00", DateTimeFormatter.ISO_OFFSET_DATE.format(LocalDate.of(2018, 3, 9).atStartOfDay(ZoneId.of("UTC-3")))); + Assert.assertEquals("Fri, 9 Mar 2018 00:00:00 -0300", DateTimeFormatter.RFC_1123_DATE_TIME.format(LocalDate.of(2018, 3, 9).atStartOfDay(ZoneId.of("UTC-3")))); + } + + @Test + public void shouldParseDateTime() { + Assert.assertEquals(LocalDate.of(2018, 3, 12), LocalDate.from(DateTimeFormatter.ISO_LOCAL_DATE.parse("2018-03-09")).plusDays(3)); + } + + @Test + public void shouldParseFormatStyleFull() { + ZonedDateTime dateTime = ZonedDateTime.from(DateTimeFormatter.ofLocalizedDateTime(FormatStyle.FULL).parse("Tuesday, August 23, 2016 1:12:45 PM EET")); + Assert.assertEquals(ZonedDateTime.of(LocalDateTime.of(2016, 8, 23, 22, 12, 45), ZoneId.of("Europe/Bucharest")), dateTime.plusHours(9)); + } + + @Test + public void shouldParseDateWithCustomFormatter() { + DateTimeFormatter europeanDateFormatter = DateTimeFormatter.ofPattern("dd.MM.yyyy"); + Assert.assertFalse(LocalDate.from(europeanDateFormatter.parse("15.08.2014")).isLeapYear()); + } + + @Test + public void shouldParseTimeWithCustomFormatter() { + DateTimeFormatter timeFormatter = DateTimeFormatter.ofPattern("hh:mm:ss a"); + Assert.assertTrue(LocalTime.from(timeFormatter.parse("12:25:30 AM")).isBefore(LocalTime.NOON)); + } + + @Test + public void shouldParseZonedDateTimeWithCustomFormatter() { + DateTimeFormatter zonedFormatter = DateTimeFormatter.ofPattern("dd.MM.yyyy HH:mm z"); + Assert.assertEquals(7200, ZonedDateTime.from(zonedFormatter.parse("31.07.2016 14:15 GMT+02:00")).getOffset().getTotalSeconds()); + } + + @Test(expected = DateTimeParseException.class) + public void shouldExpectAnExceptionIfDateTimeStringNotMatchPattern() { + DateTimeFormatter zonedFormatter = DateTimeFormatter.ofPattern("dd.MM.yyyy HH:mm z"); + ZonedDateTime.from(zonedFormatter.parse("31.07.2016 14:15")); + } }