package com.baeldung.datetime; import static org.assertj.core.api.Assertions.assertThat; import java.time.LocalDateTime; import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; import org.junit.Test; public class UseToInstantUnitTest { private UseToInstant subject = new UseToInstant(); @Test public void givenAGregorianCalenderDate_whenConvertingToLocalDate_thenAsExpected() { GregorianCalendar givenCalender = new GregorianCalendar(2018, Calendar.JULY, 28); LocalDateTime localDateTime = subject.convertDateToLocalDate(givenCalender); assertThat(localDateTime).isEqualTo("2018-07-28T00:00:00"); } @Test public void givenADate_whenConvertingToLocalDate_thenAsExpected() { Date givenDate = new Date(1465817690000L); LocalDateTime localDateTime = subject.convertDateToLocalDate(givenDate); assertThat(localDateTime).isEqualTo("2016-06-13T13:34:50"); } }