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Implement and test default string formatting in JVM and JS

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Relax Duration.toString tests for JS and Native rounding specifics
This commit is contained in:
Ilya Gorbunov
2019-04-09 05:16:30 +03:00
parent 804d2b2d8c
commit b816f50d4d
4 changed files with 157 additions and 15 deletions
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libraries/stdlib/src/kotlin/time/Duration.kt
+36 -8
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@@ -5,6 +5,8 @@
package kotlin.time
import kotlin.math.abs
private val storageUnit = DurationUnit.NANOSECONDS
@Suppress("NON_PUBLIC_PRIMARY_CONSTRUCTOR_OF_INLINE_CLASS")
@@ -136,20 +138,44 @@ public inline class Duration internal constructor(internal val _value: Double) :
override fun toString(): String = buildString {
if (isInfinite()) {
if (isNegative()) append('-')
append("INFINITY")
} else {
// TODO: Find the most appropriate representation
append(_value)
append(storageUnit.shortName())
} else {
val absNs = absoluteValue().inNanoseconds
var scientific = false
var maxDecimals = 0
val unit = when {
absNs == 0.0 -> return "0s"
absNs < 1e-6 -> DurationUnit.SECONDS.also { scientific = true }
absNs < 1 -> DurationUnit.NANOSECONDS.also { maxDecimals = 7 }
absNs < 1e3 -> DurationUnit.NANOSECONDS
absNs < 1e6 -> DurationUnit.MICROSECONDS
absNs < 1e9 -> DurationUnit.MILLISECONDS
absNs < 1000e9 -> DurationUnit.SECONDS
absNs < 60_000e9 -> DurationUnit.MINUTES
absNs < 3600_000e9 -> DurationUnit.HOURS
absNs < 86400e9 * 1e7 -> DurationUnit.DAYS
else -> DurationUnit.DAYS.also { scientific = true }
}
val value = inUnits(unit)
return when {
scientific -> formatScientific(value)
maxDecimals > 0 -> formatUpToDecimals(value, maxDecimals)
else -> formatToExactDecimals(value, precision(abs(value)))
} + unit.shortName()
}
}
private fun precision(value: Double): Int = when {
value < 1 -> 3
value < 10 -> 2
value < 100 -> 1
else -> 0
}
fun toString(unit: DurationUnit, decimals: Int = 0): String {
require(decimals >= 0) { "decimals must be not negative, but was $decimals" }
// if (decimals == 0) return toString(unit)
if (isInfinite()) return _value.toString()
return formatToDecimals(inUnits(unit), decimals, unit.shortName())
return formatToExactDecimals(inUnits(unit), decimals) + unit.shortName()
}
@@ -226,4 +252,6 @@ val Double.days get() = Duration(this, DurationUnit.DAYS)
internal expect fun formatToDecimals(value: Double, decimals: Int, unitName: String): String
internal expect fun formatToExactDecimals(value: Double, decimals: Int): String
internal expect fun formatUpToDecimals(value: Double, decimals: Int): String
internal expect fun formatScientific(value: Double): String