GildedRose-Refactoring-Kata/Kotlin/src/test/kotlin/com/gildedrose/RandomizedRegressionTest.kt
2022-05-08 08:38:24 +02:00

71 lines
2.4 KiB
Kotlin

package com.gildedrose
import org.assertj.core.api.Assertions.assertThat
import kotlin.random.Random
/*
TODO:
- const voor maxNrDays, MaxNrItems, MaxInitialQuality, MaxInitialQuality
- run als unit test, draai 1 minuut, of 1.000.000 keer
- comment: deze kan flaky zijn, maar bij 1.000.000 is die kans wel erg klein
*/
val productLists = listOf(
"Aged Brie",
"Sulfuras, Hand of Ragnaros",
"Backstage passes to a TAFKAL80ETC concert",
"Foo"
)
val random = Random(System.currentTimeMillis())
fun main(args: Array<String>) {
(0..Int.MAX_VALUE).forEach(){
val nrItemsToTest = random.nextInt(1,5)
val nrDays = random.nextInt(1,100)
val initialItems = createRandomItemList(nrItemsToTest)
val legacyItems = initialItems.deepClone()
val refacturedItems = legacyItems.deepClone()
val legacyApp = GildedRoseLegacy(legacyItems)
val refactoredApp = GildedRose(refacturedItems)
println("testing round $it, with $nrItemsToTest items and $nrDays days")
(1..nrDays).forEach {
legacyApp.updateQuality()
refactoredApp.updateQuality()
}
val testDescription : String = describeTestcase(initialItems, nrDays, refactoredApp.items, legacyApp.items)
val actialItemsAsString = describeItems(refactoredApp.items)
val expectedItemsAsString = describeItems(legacyApp.items)
assertThat(actialItemsAsString).`as`("The following testcase failed: \n$testDescription").isEqualTo(expectedItemsAsString)
}
}
fun describeTestcase(initialItems: Array<Item>, nrDays: Int, actualItems: Array<Item>, expectedItems: Array<Item>) =
"Initial items: \n${describeItems(initialItems)}\n\n"+
"expected items after $nrDays days:\n"+
"${describeItems(expectedItems)}\n\n"+
"actual items after $nrDays days:\n"+
describeItems(actualItems)
fun describeItems(items: Array<Item>) = items.map { " -${it.name}: sellIn:${it.sellIn} quality:${it.quality}" }.joinToString("\n")
private fun createRandomItem(): Item{
val nameIndex = random.nextInt(productLists.size)
val name = productLists[nameIndex]
val sellIn =random.nextInt(-10, 100)
val quality = random.nextInt(100)
return Item(name,sellIn,quality)
}
private fun Item.clone() = Item(name,sellIn,quality)
private fun Array<Item>.deepClone() = map { it.clone() } .toTypedArray()
private fun createRandomItemList(count: Int) = (0..count).map { createRandomItem() }.toTypedArray()