ZonedDateTimeWithEpochTest.kt

import org.apache.log4j.Logger
import org.junit.Test
import java.time.*
import java.time.format.DateTimeFormatter


open class ZonedDateTimeWithEpochTest {

    @Test
    fun dateTimesExchanges_Between_Brazil_USA_West_Epoch_should_be_the_same() {

        val dateInString = "16-07-2017 02:30:05 PM"

        val currentDate = LocalDateTime.now(ZoneId.of("America/Boa_Vista"))

        val ldtNow = LocalDateTime.of(LocalDate.now(), LocalTime.now())


        val ldtSample = LocalDateTime.parse(dateInString, DateTimeFormatter.ofPattern(DATE_FORMAT))

        val cuiabaZoneId = ZoneId.of("America/Boa_Vista")
        val cuiabaDateTime = ldtSample.atZone(cuiabaZoneId)

        val newYokZoneId = ZoneId.of("Asia/Singapore")
        val nyDateTime: ZonedDateTime = cuiabaDateTime.withZoneSameInstant(newYokZoneId)

        val cuiabaEpoch = cuiabaDateTime.toInstant().toEpochMilli()
        val nyEpoch = nyDateTime.toInstant().toEpochMilli()

        val otherEpoch = ldtSample.toInstant(ZonedDateTime.now().offset).toEpochMilli()

        assert(cuiabaEpoch.equals(nyEpoch) && nyEpoch.equals(otherEpoch))
    }

    companion object {
        private val LOG = Logger.getLogger(ZonedDateTimeWithEpochTest::class.java)

        const val DATE_FORMAT: String = "dd-M-yyyy hh:mm:ss a"

    }
}