Best Kotest code snippet using io.kotest.runner.junit.platform.KotestJunitPlatformTestEngine.EngineDiscoveryRequest.postFilters
KotestJunitPlatformTestEngine.kt
Source: KotestJunitPlatformTestEngine.kt
1package io.kotest.runner.junit.platform2import io.kotest.core.config.ProjectConfiguration3import io.kotest.core.extensions.Extension4import io.kotest.core.filter.TestFilter5import io.kotest.core.spec.Spec6import io.kotest.engine.TestEngineLauncher7import io.kotest.engine.listener.PinnedSpecTestEngineListener8import io.kotest.engine.listener.ThreadSafeTestEngineListener9import io.kotest.framework.discovery.Discovery10import io.kotest.mpp.Logger11import io.kotest.runner.junit.platform.gradle.GradleClassMethodRegexTestFilter12import io.kotest.runner.junit.platform.gradle.GradlePostDiscoveryFilterExtractor13import org.junit.platform.engine.DiscoverySelector14import org.junit.platform.engine.EngineDiscoveryRequest15import org.junit.platform.engine.ExecutionRequest16import org.junit.platform.engine.TestEngine17import org.junit.platform.engine.TestExecutionResult18import org.junit.platform.engine.UniqueId19import org.junit.platform.engine.discovery.MethodSelector20import org.junit.platform.engine.discovery.UniqueIdSelector21import org.junit.platform.engine.support.descriptor.EngineDescriptor22import org.junit.platform.launcher.LauncherDiscoveryRequest23import java.util.*24import kotlin.reflect.KClass25/**26 * A Kotest implementation of a Junit Platform [TestEngine].27 */28class KotestJunitPlatformTestEngine : TestEngine {29 private val logger = Logger(KotestJunitPlatformTestEngine::class)30 companion object {31 const val EngineId = "kotest"32 }33 override fun getId(): String = EngineId34 override fun getGroupId(): Optional<String> = Optional.of("io.kotest")35 override fun execute(request: ExecutionRequest) {36 logger.log { Pair(null, "ExecutionRequest[${request::class.java.name}] [configurationParameters=${request.configurationParameters}; rootTestDescriptor=${request.rootTestDescriptor}]") }37 val root = request.rootTestDescriptor as KotestEngineDescriptor38 when (root.error) {39 null -> execute(request, root)40 else -> abortExecution(request, root.error)41 }42 }43 private fun abortExecution(request: ExecutionRequest, e: Throwable) {44 request.engineExecutionListener.executionStarted(request.rootTestDescriptor)45 request.engineExecutionListener.executionFinished(request.rootTestDescriptor, TestExecutionResult.failed(e))46 }47 private fun execute(request: ExecutionRequest, root: KotestEngineDescriptor) {48 val configuration = ProjectConfiguration()49 val listener = ThreadSafeTestEngineListener(50 PinnedSpecTestEngineListener(51 JUnitTestEngineListener(52 SynchronizedEngineExecutionListener(53 request.engineExecutionListener54 ),55 root,56 )57 )58 )59 request.configurationParameters.get("kotest.extensions").orElseGet { "" }60 .split(',')61 .map { it.trim() }62 .filter { it.isNotBlank() }63 .map { Class.forName(it).newInstance() as Extension }64 .forEach { configuration.registry.add(it) }65 TestEngineLauncher(listener)66 .withConfiguration(configuration)67 .withExtensions(root.testFilters)68 .withClasses(root.classes)69 .launch()70 }71 /**72 * gradlew --tests rules:73 * Classname: adds classname selector and ClassMethodNameFilter post discovery filter74 * Classname.method: adds classname selector and ClassMethodNameFilter post discovery filter75 * org.Classname: doesn't seem to invoke the discover or execute methods.76 *77 * filter in gradle test block:78 * includeTestsMatching("*Test") - class selectors and ClassMethodNameFilter with pattern79 * includeTestsMatching("*Test") AND includeTestsMatching("org.gradle.internal.*") - class selectors and ClassMethodNameFilter with two patterns80 */81 override fun discover(82 request: EngineDiscoveryRequest,83 uniqueId: UniqueId,84 ): KotestEngineDescriptor {85 logger.log { Pair(null, "JUnit discovery request [uniqueId=$uniqueId]") }86 logger.log { Pair(null, request.string()) }87 // if we are excluded from the engines then we say goodnight according to junit rules88 val isKotest = request.engineFilters().all { it.toPredicate().test(this) }89 if (!isKotest)90 return KotestEngineDescriptor(uniqueId, emptyList(), emptyList(), emptyList(), null)91 val classMethodFilterRegexes = GradlePostDiscoveryFilterExtractor.extract(request.postFilters())92 val gradleClassMethodTestFilter = GradleClassMethodRegexTestFilter(classMethodFilterRegexes)93 // a method selector is passed by intellij to run just a single method inside a test file94 // this happens for example, when trying to run a junit test alongside kotest tests,95 // and kotest will then run all other tests.96 // Some other engines run tests via uniqueId selectors97 // therefore, the presence of a MethodSelector or a UniqueIdSelector means we must run no tests in KT.98 // if we get a uniqueid with kotest as engine we throw because that should never happen99 val allSelectors = request.getSelectorsByType(DiscoverySelector::class.java)100 val containsUnsupported = allSelectors.any {101 if (it is UniqueIdSelector)102 if (it.uniqueId.engineId.get() == EngineId)103 throw RuntimeException("Kotest does not allow running tests via uniqueId")104 else true105 else106 it is MethodSelector107 }108 val descriptor = if (!containsUnsupported) {109 val discovery = Discovery(emptyList())110 val result = discovery.discover(request.toKotestDiscoveryRequest())111 KotestEngineDescriptor(112 uniqueId,113 result.specs,114 result.scripts,115 listOf(gradleClassMethodTestFilter),116 result.error117 )118 } else {119 KotestEngineDescriptor(uniqueId, emptyList(), emptyList(), emptyList(), null)120 }121 logger.log { Pair(null, "JUnit discovery completed [descriptor=$descriptor]") }122 return descriptor123 }124}125class KotestEngineDescriptor(126 id: UniqueId,127 val classes: List<KClass<out Spec>>,128 val scripts: List<KClass<*>>,129 val testFilters: List<TestFilter>,130 val error: Throwable?, // an error during discovery131) : EngineDescriptor(id, "Kotest") {132 override fun mayRegisterTests(): Boolean = true133}134fun EngineDiscoveryRequest.engineFilters() = when (this) {135 is LauncherDiscoveryRequest -> engineFilters.toList()136 else -> emptyList()137}138fun EngineDiscoveryRequest.postFilters() = when (this) {139 is LauncherDiscoveryRequest -> postDiscoveryFilters.toList()140 else -> emptyList()141}...
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