import org.gradle.performance.measure.Duration
import spock.lang.Specification

import static org.gradle.performance.results.PrettyCalculator.percentChange

class PrettyCalculatorSpec extends Specification {

    def "knows percentage change"() {
        expect:
        percentChange(Amount.valueOf(current, Duration.SECONDS), Amount.valueOf(previous, Duration.SECONDS)) == percent

        where:
        current  | previous | percent

    static String toMillis(Amount<Duration> duration) {
        return duration.toUnits(Duration.MILLI_SECONDS).value.setScale(3, RoundingMode.HALF_UP).stripTrailingZeros().toString() + " ms"
    }

    static <Q> Number percentChange(Amount<Q> current, Amount<Q> previous) {
        if (previous == Amount.valueOf(0, previous.getUnits())) {
            return 100 as Integer
        }
        BigDecimal result = (current - previous) / previous * 100

            def desc = diff > Duration.millis(0) ? "slower" : "faster"
            sb.append("Difference: ${diff.abs().format()} $desc (${toMillis(diff.abs())}), ${PrettyCalculator.percentChange(currentVersionMean, thisVersionMean)}%\n")
            sb.append(current.speedStats)
            sb.append(results.speedStats)
            sb.append("\n")
            sb.toString()
        } else {

  // E.g., 9s (45%) 🠆 10s (50%)
  function diffText(from, to) {
    return percentText(from) + " 🠆 " + percentText(to);
  }

  // percentText returns text that displays v in appropriate units alongside its
  // percentange.
  function percentText(v) {
    function percent(v, total) {
      return Number(((100.0 * v) / total).toFixed(1)) + '%';
    }
    return unitText(v) + " (" + percent(v, stacks.Total) + ")";
  }

const rightRange=tr.b.math.Range.fromExplicitRange(intersection.max,rangeA.max);if(rightRange.duration>0){resultRanges.push(rightRange);}