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How to use edgecase method of io.kotest.property.arbitrary.distinct class

Best Kotest code snippet using io.kotest.property.arbitrary.distinct.edgecase

collections.kt

Source:collections.kt

...77fun <A> Arb.Companion.list(gen: Gen<A>, range: IntRange = 0..100): Arb<List<A>> {78   check(!range.isEmpty())79   check(range.first >= 0)80   return arbitrary(81      edgecaseFn = { rs ->82         val emptyList = emptyList<A>()83         val singleList: List<A>? = when (gen) {84            is Arb -> (gen.edgecase(rs) ?: gen.next(rs))?.let { listOf(it) }85            is Exhaustive -> gen.values.firstOrNull()?.let { listOf(it) }86         }87         val repeatedList: List<A>? = when {88            range.last < 2 -> null // too small for repeats89            gen is Arb -> (gen.edgecase(rs) ?: gen.next(rs))?.let { a -> List(max(2, range.first)) { a } }90            gen is Exhaustive -> gen.values.firstOrNull()?.let { a -> List(max(2, range.first)) { a } }91            else -> null92         }93         listOfNotNull(emptyList, singleList, repeatedList).filter { it.size in range }.distinct().random(rs.random)94      },95      shrinker = ListShrinker(range),96      sampleFn = { rs ->97         val targetSize = rs.random.nextInt(range)98         gen.generate(rs).take(targetSize).toList().map { it.value }99      }100   )101}102/**103 * Returns an [Arb] whose of values are a list of values generated by the current arb....

strings.kt

Source:strings.kt

...21      val size = rs.random.nextInt(minSize..maxSize)22      codepoints.take(size, rs).joinToString("") { it.asString() }23   }.withEdgecaseFn { rs ->24      if (minSize == maxSize) null else {25         val lowCodePoint = codepoints.edgecase(rs)26         val min = lowCodePoint?.let { cp -> List(minSize) { cp.asString() }.joinToString("") }27         val minPlus1 = lowCodePoint?.let { cp -> List(minSize + 1) { cp.asString() }.joinToString("") }28         val edgeCases = listOfNotNull(min, minPlus1)29            .filter { it.length in minSize..maxSize }30         if (edgeCases.isEmpty()) null else edgeCases.random(rs.random)31      }32   }.withShrinker(StringShrinkerWithMin(minSize))33      .withClassifier(StringClassifier(minSize, maxSize))34      .build()35}36/**37 * Returns an [Arb] where each random value is a String which has a length in the given range.38 * By default the arb uses a [ascii] codepoint generator, but this can be substituted39 * with any codepoint generator. There are many available, such as [katakana] and so on....

FilterTest.kt

Source:FilterTest.kt

...25   }26   test("should filter edge cases") {27      val arb = Arb.int(1..10).withEdgecases(1, 2, 3).filter { it % 2 == 0 }28      val edgeCases = arb29         .generate(RandomSource.seeded(1234L), EdgeConfig(edgecasesGenerationProbability = 1.0))30         .take(5)31         .map { it.value }32         .toList()33      edgeCases shouldContainExactly listOf(2, 2, 2, 2, 2)34   }35   test("should be stack safe") {36      val arb = object : Arb<Int>() {37         override fun edgecase(rs: RandomSource): Int? = null38         override fun sample(rs: RandomSource): Sample<Int> = Sample(rs.random.nextInt())39      }40      shouldNotThrow<StackOverflowError> {41         arb.filter { it % 2 == 0 }.take(1000000).toList()42      }43   }44   test("should apply filter to shrinks") {45      val arbEvenInts = Arb.int(-100..100).filter { it % 2 == 0 }46      val oddNumbers = (-100..100).filter { it % 2 != 0 }47      arbEvenInts.samples().take(100).forAll { sample ->48         sample.shrinks.value() shouldNotBeIn oddNumbers49         sample.shrinks.children.value.forAll {50            it.value() shouldNotBeIn oddNumbers51         }...

distinct.kt

Source:distinct.kt

...5import io.kotest.property.Sample6@DelicateKotest7fun <A> Arb<A>.distinct(attempts: Int = 100) = object : Arb<A>() {8   private val seen = mutableSetOf<A>()9   override fun edgecase(rs: RandomSource): A? = this@distinct.edgecase(rs)10   override fun sample(rs: RandomSource): Sample<A> {11      var iterations = 012      return generateSequence {13         if (iterations++ < attempts) this@distinct.sample(rs) else null14      }.filter { seen.add(it.value) }.first()15   }16}

edgecase

Using AI Code Generation

1class DistinctClassesTest : WordSpec() {2override fun isInstancePerTest(): Boolean = true3init {4"distinct classes" should {5"generate distinct classes" {6edgecase(Classes()).distinct().take(100).toList().shouldHaveSize(100)7}8}9}10}11class DistinctClassesTest : WordSpec() {12override fun isInstancePerTest(): Boolean = true13init {14"distinct classes" should {15"generate distinct classes" {16edgecase(Classes()).distinct().take(100).toList().shouldHaveSize(100)17}18}19}20}21class DistinctClassesTest : WordSpec() {22override fun isInstancePerTest(): Boolean = true23init {24"distinct classes" should {25"generate distinct classes" {26edgecase(Classes()).distinct().take(100).toList().shouldHaveSize(100)27}28}29}30}31class DistinctClassesTest : WordSpec() {32override fun isInstancePerTest(): Boolean = true33init {34"distinct classes" should {35"generate distinct classes" {36edgecase(Classes()).distinct().take(100).toList().shouldHaveSize(100)37}38}39}40}41class DistinctClassesTest : WordSpec() {42override fun isInstancePerTest(): Boolean = true43init {44"distinct classes" should {45"generate distinct classes" {46edgecase(Classes()).distinct().take(100).toList().shouldHaveSize(100)47}48}49}50}51class DistinctClassesTest : WordSpec() {52override fun isInstancePerTest(): Boolean = true53init {54"distinct classes" should {55"generate distinct classes" {

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