gistfile1.kt

package org.humanizer.jvm.tests

import org.spek.Spek
import org.spek.givenData
import org.humanizer.jvm.humanize
import org.spek.shouldEqual
import org.humanizer.jvm.dehumanize
import org.humanizer.jvm.milliSecondsToTimespan

public class TimeSpanTests(): Spek() {
    {

        var data = listOf(
                1 to "0 seconds",
                1000 to "1 second",
                5000 to "5 seconds",
                60000 to "1 minute",
                61000 to "1 minute and 1 second",
                65000 to "1 minute and 5 seconds",
                120000 to "2 minutes",
                121000 to "2 minutes and 1 second",
                125000 to "2 minutes and 5 seconds")

        givenData(data) {
            val (input, expected) = it
            on("calling toTimespan on $input", {
                val actual = input.milliSecondsToTimespan()
                it("should become ${it.component2()}", {
                    shouldEqual(expected, actual)
                })
            })
        }
    }
}

gistfile2.kt

package org.humanizer.jvm

fun Int.milliSecondsToTimespan(milliSecondPrecision : Boolean = true) : String
{
    return this.toLong().milliSecondsToTimespan()
}

// Honestly stolen from here http://stackoverflow.com/a/2795991
fun Long.milliSecondsToTimespan() : String{
    val sb = StringBuffer()
    val diffInSeconds = this / 1000
    val seconds = if(diffInSeconds >= 60)  diffInSeconds % 60 else diffInSeconds
    val minutes = if((diffInSeconds / 60) >= 60)  diffInSeconds % (60* 60) else diffInSeconds / 60
    val hours = if((diffInSeconds / 3600) >= 24) diffInSeconds % (60*60*24) else diffInSeconds / 3600
    val days = diffInSeconds / 60 / 60 / 24

    if (days > 0) {
        sb.append("day".toQuantity(days));
        if (hours > 0) {
            sb.append(" and ${"hour".toQuantity(hours)}");
        }
    } else if (hours > 0) {
        sb.append("hour".toQuantity(hours))
        if (minutes > 0) {
            sb.append(" and ${"minute".toQuantity(minutes)}");
        }
    } else if (minutes > 0) {
        sb.append("minute".toQuantity(minutes))
        if (seconds > 0) {
            sb.append(" and ${"second".toQuantity(seconds)}");
        }
    } else
    {
        sb.append("second".toQuantity(seconds));
    }

    return sb.toString()
}