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How to use GradlePostDiscoveryFilterExtractor class of io.kotest.runner.junit.platform.gradle package

Best Kotest code snippet using io.kotest.runner.junit.platform.gradle.GradlePostDiscoveryFilterExtractor

KotestJunitPlatformTestEngine.kt

Source:KotestJunitPlatformTestEngine.kt

...8import 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         else...

GradlePostDiscoveryFilterExtractor.kt

Source:GradlePostDiscoveryFilterExtractor.kt

...15 * to this reflection bullshit to get the raw strings out, so we can parse and apply the patterns ourselves,16 * thus allowing kotest to properly support the --tests options.17 *18 */19object GradlePostDiscoveryFilterExtractor {20   private val logger = Logger(GradlePostDiscoveryFilterExtractor::class)21   fun extract(filters: List<PostDiscoveryFilter>): List<String> {22      val classMethodFilters = filters.filter { it.javaClass.simpleName == "ClassMethodNameFilter" }23      return classMethodFilters.flatMap { extract(it) }24   }25   private fun extract(filter: Any): List<String> = runCatching {26      val matcher = testMatcher(filter)27      logger.log { Pair(null, "TestMatcher [$matcher]") }28      val commandLineIncludePatterns = commandLineIncludePatterns(matcher)29      logger.log { Pair(null, "commandLineIncludePatterns [$commandLineIncludePatterns]") }30      val regexes = commandLineIncludePatterns.map { pattern(it) }31      logger.log { Pair(null, "ClassMethodNameFilter regexes [$regexes]") }32      regexes33   }.getOrElse { emptyList() }34   private fun testMatcher(obj: Any): Any {...

GradlePostDiscoveryFilterExtractor

Using AI Code Generation

1import io.kotest.core.spec.Spec2import io.kotest.runner.junit.platform.gradle.GradlePostDiscoveryFilterExtractor3import org.junit.platform.engine.discovery.DiscoverySelectors4import org.junit.platform.launcher.core.LauncherDiscoveryRequestBuilder5import org.junit.platform.launcher.core.LauncherFactory6object GradlePostDiscoveryFilterExtractorTest {7    fun main(args: Array<String>) {8        val classes = listOf(9        val launcher = LauncherFactory.create()10        val request = LauncherDiscoveryRequestBuilder.request()11            .selectors(classes.map { DiscoverySelectors.selectClass(it) })12            .build()13        val filter = GradlePostDiscoveryFilterExtractor.extract(request, launcher)14        val filteredSpecs = filter.filter(classes.map { Class.forName(it).kotlin as Class<out Spec> })15        println(filteredSpecs)16    }17}18[kotlin.KotlinReflectionInternalError: Exception while analyzing expression at (1,1) in /home/ranjit/IdeaProjects/kotest/kotest-runner/kotest-runner-junit5/src/test/kotlin/io/kotest/runner/junit5/SpecExecutorTest.kt]

GradlePostDiscoveryFilterExtractor

Using AI Code Generation

1val gradlePostDiscoveryFilterExtractor = GradlePostDiscoveryFilterExtractor(gradleTestFilter)2val kotestTestEngine = KotestTestEngine()3kotestTestEngine.execute(kotestTestFilter)4val gradleTestFilter = GradleTestFilter()5val gradlePostDiscoveryFilterExtractor = GradlePostDiscoveryFilterExtractor(gradleTestFilter)6val kotestTestEngine = KotestTestEngine()7kotestTestEngine.execute(kotestTestFilter)8val gradleTestFilter = GradleTestFilter()9val gradlePostDiscoveryFilterExtractor = GradlePostDiscoveryFilterExtractor(gradleTestFilter)10val kotestTestEngine = KotestTestEngine()11kotestTestEngine.execute(kotestTestFilter)12val gradleTestFilter = GradleTestFilter()13val gradlePostDiscoveryFilterExtractor = GradlePostDiscoveryFilterExtractor(gradleTestFilter)14val kotestTestEngine = KotestTestEngine()15kotestTestEngine.execute(kotestTestFilter)

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