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How to use ShrinkingMode.isShrinking method of io.kotest.property.internal.Counter class

Best Kotest code snippet using io.kotest.property.internal.Counter.ShrinkingMode.isShrinking

shrink.kt

Source:shrink.kt

1package io.kotest.property.internal2import io.kotest.assertions.print.print3import io.kotest.mpp.stacktraces4import io.kotest.property.PropertyTesting5import io.kotest.property.RTree6import io.kotest.property.ShrinkingMode7import io.kotest.property.isEmpty8/**9 * Accepts a value of type A and a function that varies in type A (fixed in any other types) and attempts10 * to shrink the value to find the smallest failing case.11 *12 * For each step in the shrinker, we test all the values. If they all pass then the shrinking ends.13 * Otherwise, the next batch is taken and the shrinks continue.14 *15 * Once all values from a shrink step pass, we return the previous value as the "smallest" failing case16 * along with the reason for the failure.17 *18 */19suspend fun <A> doShrinking(20   initial: RTree<A>,21   mode: ShrinkingMode,22   test: suspend (A) -> Unit23): ShrinkResult<A> {24   if (initial.isEmpty()) return ShrinkResult(initial.value(), initial.value(), null)25   val counter = Counter()26   val tested = mutableSetOf<A>()27   val sb = StringBuilder()28   sb.append("Attempting to shrink arg ${initial.value().print().value}\n")29   val stepResult = doStep(initial, mode, tested, counter, test, sb)30   result(sb, stepResult, counter.count)31   return if (stepResult == null) {32      ShrinkResult(initial.value(), initial.value(), null)33   } else {34      ShrinkResult(initial.value(), stepResult.failed, stepResult.cause)35   }36}37class Counter {38   var count = 039   fun inc() = count++40}41/**42 * The result of shrinking a failed arg.43 * If no shrinking took place, shrink should be set to the same as iniital44 */45data class ShrinkResult<out A>(val initial: A, val shrink: A, val cause: Throwable?)46data class StepResult<A>(val failed: A, val cause: Throwable)47/**48 * Performs shrinking on the given RTree. Recurses into the tree for failing cases.49 * Returns the last candidate to fail as a [StepResult] or null if the initial passes.50 */51suspend fun <A> doStep(52   tree: RTree<A>,53   mode: ShrinkingMode,54   tested: MutableSet<A>,55   counter: Counter,56   test: suspend (A) -> Unit,57   sb: StringBuilder58): StepResult<A>? {59   // if no more shrinking return null (if we've hit the bounds)60   if (!mode.isShrinking(counter.count)) return null61   val candidates = tree.children.value62   candidates.asSequence()63      // shrinkers might generate duplicate candidates so we must filter them out to avoid infinite loops or slow shrinking64      .filter { tested.add(it.value()) }65      .forEach { a ->66         val candidate = a.value()67         counter.inc()68         try {69            test(candidate)70            if (PropertyTesting.shouldPrintShrinkSteps)71               sb.append("Shrink #${counter.count}: ${candidate.print().value} pass\n")72         } catch (t: Throwable) {73            if (PropertyTesting.shouldPrintShrinkSteps)74               sb.append("Shrink #${counter.count}: ${candidate.print().value} fail\n")75            // this result failed, so we'll recurse in to find further failures otherwise return this candidate76            return doStep(a, mode, tested, counter, test, sb) ?: StepResult(candidate, t)77         }78      }79   return null80}81/**82 * Returns true if we should continue shrinking given the count.83 */84private fun ShrinkingMode.isShrinking(count: Int): Boolean = when (this) {85   ShrinkingMode.Off -> false86   ShrinkingMode.Unbounded -> true87   is ShrinkingMode.Bounded -> count < bound88}89private fun <A> result(sb: StringBuilder, result: StepResult<A>?, count: Int) {90   if (count == 0 || result == null) {91      sb.append("Arg was not shunk\n")92   } else {93      sb.append("Shrink result (after $count shrinks) => ${result.failed.print().value}\n\n")94      when (val location = stacktraces.throwableLocation(result.cause, 4)) {95         null -> sb.append("Caused by ${result.cause}\n")96         else -> {97            sb.append("Caused by ${result.cause} at\n")98            location.forEach { sb.append("\t$it\n") }99         }100      }101   }102   if (PropertyTesting.shouldPrintShrinkSteps) {103      println(sb)104   }105}...

ShrinkingMode.isShrinking

Using AI Code Generation

1import io.kotest.property.ShrinkingMode2import io.kotest.property.internal.Counter3fun main() {4    val counter = Counter()5    println(counter.isShrinking())6    counter.increment()7    println(counter.isShrinking())8    counter.increment()9    println(counter.isShrinking())10    counter.increment()11    println(counter.isShrinking())12}

ShrinkingMode.isShrinking

Using AI Code Generation

1import io.kotest.property.internal.Counter2fun main() {3    val counter = Counter()4    counter.increment()5    println(counter.isShrinking)6}7import io.kotest.property.internal.Counter8fun main() {9    val counter = Counter()10    counter.increment()11    counter.increment()12    println(counter.isShrinking)13}14import io.kotest.property.internal.Counter15fun main() {16    val counter = Counter()17    counter.increment()18    counter.increment()19    counter.increment()20    println(counter.isShrinking)21}22import io.kotest.property.internal.Counter23fun main() {24    val counter = Counter()25    counter.increment()26    counter.increment()27    counter.increment()28    counter.increment()29    println(counter.isShrinking)30}31import io.kotest.property.internal.Counter32fun main() {33    val counter = Counter()34    counter.increment()35    counter.increment()36    counter.increment()37    counter.increment()38    counter.increment()39    println(counter.isShrinking)40}41import io.kotest.property.internal.Counter42fun main() {43    val counter = Counter()44    counter.increment()45    counter.increment()46    counter.increment()47    counter.increment()48    counter.increment()49    counter.increment()50    println(counter.isShrinking)51}52import io.kotest.property.internal.Counter53fun main() {54    val counter = Counter()55    counter.increment()56    counter.increment()57    counter.increment()58    counter.increment()59    counter.increment()60    counter.increment()61    counter.increment()62    println(counter.isShrinking)63}64import

ShrinkingMode.isShrinking

Using AI Code Generation

1inline fun <reified T : Throwable> assertFailsWith (2block: () -> Unit3assertFailsWith(T::class, message, block)4inline fun <reified T : Throwable> assertFailsWith (5block: () -> Unit6assertFailsWith(T::class, block)7fun <T : Throwable> assertFailsWith (8block: () -> Unit9try {10block()11fail("Expected an exception to be thrown, but was completed successfully.")12} catch (actual: Throwable) {13if (actual is AssertionFailedError)14if (actual::class != expected)15fail("Expected an exception of type ${expected.simpleName}, but was ${actual::class.simpleName}.")16if (message != null && actual.message != message)17fail("Expected an exception with message \"$message\", but was \"${actual.message}\".")18@Suppress("UNCHECKED_CAST")19}20fun <T> fail (message: String? = null): T =21if (message != null) throw AssertionFailedError(message) else throw AssertionFailedError()22fun failNotEquals (23fail(24if (message != null) "$message expected: <$expected> but was: <$actual>"25fun failNotEquals (26fail(27if (message != null) "$message expected: <$expected> but was: <$actual>"28fun failNotEquals (29fail(30if (message != null) "$message expected: <$expected> but was: <$actual>"31fun failNotEquals (32fail(

ShrinkingMode.isShrinking

Using AI Code Generation

1fun `isShrinking method of io.kotest.property.internal.Counter class should return true if the property is shrinking`(2    @ForAll("ints") a: Int,3    @ForAll("ints") b: Int4) {5    val counter = Counter()6    val property = forAll(Gen.int(), Gen.int()) { x: Int, y: Int ->7        counter.inc()8    }9    property.check()10}11fun `isShrinking method of io.kotest.property.internal.Counter class should return false if the property is not shrinking`(12    @ForAll("ints") a: Int,13    @ForAll("ints") b: Int14) {15    val counter = Counter()16    val property = forAll(Gen.int(), Gen.int()) { x: Int, y: Int ->17        counter.inc()18    }19    property.check()20}21fun `isShrinking method of io.kotest.property.internal.Counter class should return true if the property is shrinking`(22    @ForAll("ints") a: Int,23    @ForAll("ints") b: Int24) {25    val counter = Counter()26    val property = forAll(Gen.int(), Gen.int()) { x: Int, y: Int ->27        counter.inc()28    }29    property.check()30}31fun `isShrinking method of io.kotest.property.internal.Counter class should return false if the property is not shrinking`(32    @ForAll("ints") a: Int,33    @ForAll("ints") b: Int34) {35    val counter = Counter()36    val property = forAll(Gen.int(), Gen.int()) { x: Int, y: Int ->37        counter.inc()38    }39    property.check()40}

ShrinkingMode.isShrinking

Using AI Code Generation

1val counter = Counter()2val result = counter.increment().increment().decrement().increment().decrement().decrement()3counter.isShrinking() shouldBe true4val counter = Counter()5val result = counter.increment().increment().increment().increment().increment().increment()6counter.isShrinking() shouldBe false7val counter = Counter()8val result = counter.increment().increment().increment().increment().increment().increment()9counter.isShrinking() shouldBe false10val counter = Counter()11val result = counter.increment().increment().increment().increment().increment().increment()12counter.isShrinking() shouldBe false13val counter = Counter()14val result = counter.increment().increment().increment().increment().increment().increment()15counter.isShrinking() shouldBe false16val counter = Counter()17val result = counter.increment().increment().increment().increment().increment().increment()18counter.isShrinking() shouldBe false19val counter = Counter()20val result = counter.increment().increment().increment().increment().increment().increment()21counter.isShrinking() shouldBe false22val counter = Counter()23val result = counter.increment().increment().increment().increment().increment().increment()

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