How to use FixedThreadCoroutineDispatcherFactory class of io.kotest.engine.concurrency package

Best Kotest code snippet using io.kotest.engine.concurrency.FixedThreadCoroutineDispatcherFactory

FixedThreadCoroutineDispatcherFactory.kt

Source:FixedThreadCoroutineDispatcherFactory.kt Github

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...25 *26 * As factories can be shared across specs, it is possible to create an instance of this factory27 * and assign it to be used by several specs independently of others.28 */29class FixedThreadCoroutineDispatcherFactory(30 threads: Int,31 private val affinity: Boolean,32) : CoroutineDispatcherFactory {33 private val logger = Logger(FixedThreadCoroutineDispatcherFactory::class)34 private val dispatchers = List(threads) { Executors.newSingleThreadExecutor().asCoroutineDispatcher() }35 override suspend fun <T> withDispatcher(testCase: TestCase, f: suspend () -> T): T {36 val resolvedAffinity = testCase.spec.dispatcherAffinity ?: testCase.spec.dispatcherAffinity() ?: affinity37 logger.log { Pair(testCase.name.testName, "affinity=$resolvedAffinity") }38 // if dispatcher affinity is set to true, we pick a dispatcher for the spec and stick with it39 // otherwise each test just gets a random dispatcher40 val dispatcher = when (resolvedAffinity) {41 true -> dispatcherFor(testCase.spec::class)42 else -> dispatchers.random()43 }44 logger.log { Pair(testCase.name.testName, "Switching dispatcher to $dispatcher") }45 return withContext(dispatcher) {46 f()47 }...

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coroutineDispatcherFactoryInterceptor.kt

Source:coroutineDispatcherFactoryInterceptor.kt Github

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2import io.kotest.core.concurrency.CoroutineDispatcherFactory3import io.kotest.core.test.TestCase4import io.kotest.core.test.TestResult5import io.kotest.core.test.TestScope6import io.kotest.engine.concurrency.FixedThreadCoroutineDispatcherFactory7import io.kotest.engine.test.scopes.withCoroutineContext8import io.kotest.mpp.Logger9import kotlinx.coroutines.CoroutineDispatcher10import kotlinx.coroutines.test.TestCoroutineDispatcher11import kotlinx.coroutines.test.TestDispatcher12import kotlin.coroutines.coroutineContext13@ExperimentalStdlibApi14internal actual fun coroutineDispatcherFactoryInterceptor(15 defaultCoroutineDispatcherFactory: CoroutineDispatcherFactory16): TestExecutionInterceptor = CoroutineDispatcherFactoryInterceptor(defaultCoroutineDispatcherFactory)17/**18 * Switches execution onto a dispatcher provided by a [CoroutineDispatcherFactory].19 *20 * If the coroutine is an instance of [TestDispatcher] then the coroutine will not be changed.21 */22@ExperimentalStdlibApi23internal class CoroutineDispatcherFactoryInterceptor(24 private val defaultCoroutineDispatcherFactory: CoroutineDispatcherFactory25) : TestExecutionInterceptor {26 private val logger = Logger(CoroutineDispatcherFactoryInterceptor::class)27 override suspend fun intercept(28 testCase: TestCase,29 scope: TestScope,30 test: suspend (TestCase, TestScope) -> TestResult31 ): TestResult {32 val currentDispatcher = coroutineContext[CoroutineDispatcher]33 // we don't override if we've set a test dispatcher on this already34 return if (currentDispatcher is TestDispatcher) {35 test(testCase, scope)36 } else {37 val userFactory = testCase.spec.coroutineDispatcherFactory ?: testCase.spec.coroutineDispatcherFactory()38 val threads = testCase.spec.threads ?: testCase.spec.threads() ?: 139 logger.log { Pair(testCase.name.testName, "userFactory=$userFactory; threads=$threads") }40 val f = when {41 userFactory != null -> userFactory42 threads > 1 -> FixedThreadCoroutineDispatcherFactory(threads, false)43 else -> defaultCoroutineDispatcherFactory44 }45 logger.log { Pair(testCase.name.testName, "Switching dispatcher using factory $f") }46 f.withDispatcher(testCase) {47 test(testCase, scope.withCoroutineContext(coroutineContext))48 }49 }50 }51}...

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DefaultCoroutineDispatcherFactory.kt

Source:DefaultCoroutineDispatcherFactory.kt Github

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1package io.kotest.engine.concurrency2import io.kotest.core.concurrency.CoroutineDispatcherFactory3import io.kotest.core.config.ProjectConfiguration4internal actual fun defaultCoroutineDispatcherFactory(configuration: ProjectConfiguration): CoroutineDispatcherFactory =5 FixedThreadCoroutineDispatcherFactory(configuration.parallelism, configuration.dispatcherAffinity)...

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FixedThreadCoroutineDispatcherFactory

Using AI Code Generation

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1+class FixedThreadCoroutineDispatcherFactoryTest : WordSpec({2+ "FixedThreadCoroutineDispatcherFactory" should {3+ "create fixed thread dispatcher with given number of threads" {4+ val dispatcher = FixedThreadCoroutineDispatcherFactory(4).create()5+ }6+ }7+})8+import io.kotest.core.concurrency.CoroutineDispatcherFactory9+import kotlinx.coroutines.CoroutineDispatcher10+import kotlinx.coroutines.asCoroutineDispatcher11+import java.util.concurrent.Executors12+class SingleThreadCoroutineDispatcherFactory : CoroutineDispatcherFactory {13+ override fun create(): CoroutineDispatcher {14+ return Executors.newSingleThreadExecutor().asCoroutineDispatcher()15+ }16+}17+import io.kotest

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FixedThreadCoroutineDispatcherFactory

Using AI Code Generation

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1+class MyTest : FunSpec({2+ val dispatcher = FixedThreadCoroutineDispatcherFactory(4).create()3+ val scope = CoroutineScope(dispatcher)4+ test("some test") {5+ }6+})7+class MyTest : CoroutineTest() {8+ get() = TestCoroutineDispatcher()9+ test("some test") {

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FixedThreadCoroutineDispatcherFactory

Using AI Code Generation

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1 val dispatcher = FixedThreadCoroutineDispatcherFactory(4).create()2 withCoroutineContext(dispatcher) {3 }4 class MySpec : FunSpec({5 listeners(MyListener())6 })7 registerListener(MyListener())

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FixedThreadCoroutineDispatcherFactory

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1val dispatcher = FixedThreadCoroutineDispatcherFactory(2)2class MySpec : FunSpec() {3 override fun extensions(): List<Extension> = listOf(4 object : TestContext {5 override fun afterTest(testCase: TestCase, result: TestResult) {6 println(testCase.spec.configuration)7 }8 }9}10class MySpec : FunSpec() {11 override fun extensions(): List<Extension> = listOf(12 object : TestScope {13 override fun beforeEach(testCase: TestCase) {14 println(testCase.spec)15 }16 }17}18class MySpec : FunSpec()

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