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How to use KClass.isIsolate method of io.kotest.engine.concurrency.concurrency class

Best Kotest code snippet using io.kotest.engine.concurrency.concurrency.KClass.isIsolate

ConcurrentTestSuiteScheduler.kt

Source:ConcurrentTestSuiteScheduler.kt

1package io.kotest.engine2import io.kotest.common.ExperimentalKotest3import io.kotest.core.annotation.DoNotParallelize4import io.kotest.core.annotation.Isolate5import io.kotest.core.project.TestSuite6import io.kotest.core.spec.SpecRef7import io.kotest.engine.concurrency.defaultCoroutineDispatcherFactory8import io.kotest.engine.concurrency.isIsolate9import io.kotest.engine.interceptors.EngineContext10import io.kotest.engine.listener.CollectingTestEngineListener11import io.kotest.engine.spec.SpecExecutor12import io.kotest.mpp.Logger13import io.kotest.mpp.bestName14import kotlinx.coroutines.coroutineScope15import kotlinx.coroutines.launch16import kotlinx.coroutines.sync.Semaphore17import kotlinx.coroutines.sync.withPermit18/**19 * A [TestSuiteScheduler] that schedules specs concurrently, up to a provided [maxConcurrent] value.20 * If the value is 1 then this scheduler will execute specs strictly sequentially.21 *22 * Additionally, on JVM targets, it will recognize the [Isolate] and [DoNotParallelize]23 * annotations to ensure those specs are never scheduled concurrently.24 *25 * @param maxConcurrent The maximum number of concurrent coroutines.26 */27@ExperimentalKotest28internal class ConcurrentTestSuiteScheduler(29   private val maxConcurrent: Int,30   private val context: EngineContext,31) : TestSuiteScheduler {32   private val logger = Logger(ConcurrentTestSuiteScheduler::class)33   override suspend fun schedule(suite: TestSuite): EngineResult {34      logger.log { Pair(null, "Launching ${suite.specs.size} specs") }35      val (sequential, concurrent) = suite.specs.partition { it.kclass.isIsolate() }36      logger.log { Pair(null, "Split on isIsolate: ${sequential.size} sequential ${concurrent.size} concurrent") }37      schedule(concurrent, maxConcurrent)38      logger.log { Pair(null, "Concurrent specs have completed") }39      schedule(sequential, 1)40      logger.log { Pair(null, "Sequential specs have completed") }41      return EngineResult(emptyList())42   }43   private suspend fun schedule(44      specs: List<SpecRef>,45      concurrency: Int,46   ) = coroutineScope { // we don't want this function to return until all specs are completed47      val coroutineDispatcherFactory = defaultCoroutineDispatcherFactory(context.configuration)48      val semaphore = Semaphore(concurrency)49      val collector = CollectingTestEngineListener()50      specs.forEach { ref ->51         logger.log { Pair(ref.kclass.bestName(), "Scheduling coroutine") }52         launch {53            semaphore.withPermit {54               logger.log { Pair(ref.kclass.bestName(), "Acquired permit") }55               if (context.configuration.projectWideFailFast && collector.errors) {56                  context.listener.specIgnored(ref.kclass, null)57               } else {58                  try {59                     val executor = SpecExecutor(coroutineDispatcherFactory, context.mergeListener(collector))60                     logger.log { Pair(ref.kclass.bestName(), "Executing ref") }61                     executor.execute(ref)62                  } catch (t: Throwable) {63                     logger.log { Pair(ref.kclass.bestName(), "Unhandled error during spec execution $t") }64                     throw t65                  }66               }67            }68            logger.log { Pair(ref.kclass.bestName(), "Released permit") }69         }70      }71   }72}...

concurrency.kt

Source:concurrency.kt

1package io.kotest.engine.concurrency2import io.kotest.core.annotation.DoNotParallelize3import io.kotest.core.annotation.Isolate4import io.kotest.mpp.annotation5import kotlin.reflect.KClass6/**7 * Returns true if this class is annotated with either of the annotations used to indicate8 * this spec should not run concurrently regardless of config.9 *10 * Those annotations are [DoNotParallelize] and [Isolate].11 */12internal fun KClass<*>.isIsolate(): Boolean = annotation<DoNotParallelize>() != null || annotation<Isolate>() != null...

KClass.isIsolate

Using AI Code Generation

1    val concurrency = concurrency()2    val testThread = Thread.currentThread()3    return when (concurrency) {4       is Concurrency.Isolated -> {5       }6       is Concurrency.Shared -> {7          val newContext = context.withValue(testThread, value)8       }9    }10 }11class ContextTest : FunSpec() {12   init {13      test("context should be set") {14         val context = context()15         context.get("hello") shouldBe "world"16      }17   }18}

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