QuestionExplained.kt

val calculatedTimezoneOffset = TimeZone.getDefault().let {
    // The problem is
    // TimeZone.getTimeZone("UK").inDaylightTime(Date())
    // is false every time. If this is true everything pass.
    val offset = if(TimeZone.getTimeZone("UK").inDaylightTime(Date()))
        it.getOffset(System.currentTimeMillis()) + 3600000 // -> this is the one hour of daily saving time.
    else
    it.getOffset(System.currentTimeMillis())
    offset
}
assertThat(never.created.time + calculatedTimezoneOffset).isEqualTo(formatter.parse("2019-08-23 15:50:00").time)