Join the 1-day Testing & QA Summit featuring 15+ Expert Speakers.Register for FREE! Join TestMu Conference

How to use KotestEngineLauncher class of io.kotest.engine package

Best Kotest code snippet using io.kotest.engine.KotestEngineLauncher

KotestEngineLauncher.kt

Source:KotestEngineLauncher.kt

...15 */16@KotestInternal17@Suppress("DEPRECATION")18@Deprecated("Prefer TestEngineLauncher. Deprecated since 5.0")19class KotestEngineLauncher(20   private val listeners: List<TestEngineListener>,21   private val specs: List<KClass<out Spec>>,22   private val testFilters: List<TestFilter>,23   private val specFilters: List<SpecFilter>,24   private val tags: TagExpression?,25   private val scripts: List<KClass<*>>,26) {27   companion object {28      fun default(29         listeners: List<TestEngineListener>,30         specs: List<KClass<out Spec>>,31         tags: TagExpression?32      ): KotestEngineLauncher {33         return KotestEngineLauncher(34            listeners = listeners,35            specs = specs,36            scripts = emptyList(),37            testFilters = emptyList(),38            specFilters = emptyList(),39            tags = tags,40         )41      }42   }43   constructor() : this(emptyList(), emptyList(), emptyList(), emptyList(), null, emptyList())44   @Deprecated("This class is deprecated since 5.0")45   fun launch(): EngineResult {46      if (listeners.isEmpty())47         error("Cannot launch a KotestEngine without at least one TestEngineListener")48      val launcher = TestEngineLauncher(49         ThreadSafeTestEngineListener(50            PinnedSpecTestEngineListener(51               CompositeTestEngineListener(listeners)52            )53         )54      ).withExtensions(testFilters)55         .withExtensions(specFilters)56         .withTagExpression(tags)57         .withClasses(specs)58      return launcher.launch()59   }60   @Deprecated("This class is deprecated since 5.0")61   fun withFilter(filter: TestFilter) = withFilters(listOf(filter))62   @Deprecated("This class is deprecated since 5.0")63   fun withListener(listener: TestEngineListener) = KotestEngineLauncher(64      listeners = this.listeners + listener,65      specs = specs,66      testFilters = testFilters,67      specFilters = specFilters,68      tags = tags,69      scripts = scripts,70   )71   @Deprecated("This class is deprecated since 5.0")72   fun withDumpConfig(dump: Boolean) = KotestEngineLauncher(73      listeners = listeners,74      specs = specs,75      testFilters = testFilters,76      specFilters = specFilters,77      tags = tags,78      scripts = scripts,79   )80   @Deprecated("This class is deprecated since 5.0")81   fun withSpecFilters(filters: List<SpecFilter>): KotestEngineLauncher {82      return KotestEngineLauncher(83         listeners = listeners,84         specs = specs,85         testFilters = testFilters,86         specFilters = specFilters + filters,87         tags = tags,88         scripts = scripts,89      )90   }91   @Deprecated("This class is deprecated since 5.0")92   fun withTestFilters(filters: List<TestFilter>): KotestEngineLauncher {93      return KotestEngineLauncher(94         listeners = listeners,95         specs = specs,96         testFilters = testFilters + filters,97         specFilters = specFilters,98         tags = tags,99         scripts = scripts,100      )101   }102   @Deprecated("This class is deprecated since 5.0")103   fun withFilters(filters: List<TestFilter>): KotestEngineLauncher = withTestFilters(filters)104   @Deprecated("This class is deprecated since 5.0")105   fun withScripts(scripts: List<KClass<*>>): KotestEngineLauncher {106      return KotestEngineLauncher(107         listeners = listeners,108         specs = specs,109         testFilters = testFilters,110         specFilters = specFilters,111         tags = tags,112         scripts = scripts,113      )114   }115   @Deprecated("This class is deprecated since 5.0")116   fun withSpec(klass: KClass<out Spec>) = withSpecs(listOf(klass))117   @Deprecated("This class is deprecated since 5.0")118   fun withSpecs(vararg specs: KClass<out Spec>) = withSpecs(specs.toList())119   @Deprecated("This class is deprecated since 5.0")120   fun withSpecs(specs: List<KClass<out Spec>>): KotestEngineLauncher {121      return KotestEngineLauncher(122         listeners = listeners,123         specs = specs,124         testFilters = testFilters,125         specFilters = specFilters,126         tags = tags,127         scripts = scripts,128      )129   }130   @Deprecated("This class is deprecated since 5.0")131   fun withTags(tags: TagExpression?): KotestEngineLauncher {132      return KotestEngineLauncher(133         listeners = listeners,134         specs = specs,135         testFilters = testFilters,136         specFilters = specFilters,137         tags = tags,138         scripts = scripts,139      )140   }141}...

UnstableTestNameWithLeafIsolationTest.kt

Source:UnstableTestNameWithLeafIsolationTest.kt

...7//import io.kotest.core.spec.style.FunSpec8//import io.kotest.core.test.TestCase9//import io.kotest.core.test.TestResult10//import io.kotest.core.test.TestStatus11//import io.kotest.engine.KotestEngineLauncher12//import io.kotest.engine.listener.AbstractTestEngineListener13//import io.kotest.matchers.shouldBe14//import io.kotest.matchers.shouldNotBe15//16//@ExperimentalKotest17//@Isolate // sets global values via configuration so must be isolated18//class UnstableTestNameWithLeafIsolationTest : FunSpec() {19//   init {20//21//      val results = mutableListOf<TestStatus>()22//23//      val listener = object : AbstractTestEngineListener() {24//         override suspend fun testFinished(testCase: TestCase, result: TestResult) {25//            results.add(result.status)26//         }27//      }28//29//      beforeTest {30//         results.clear()31//      }32//33//      test("isolation mode leaf + regular classes should show all tests in data testing") {34//35//         KotestEngineLauncher()36//            .withListener(listener)37//            .withSpec(RegularClassAndLeafIsolation::class)38//            .launch()39//40//         results shouldBe listOf(41//            TestStatus.Success,42//            TestStatus.Failure,43//            TestStatus.Success,44//            TestStatus.Success,45//            TestStatus.Failure,46//            TestStatus.Success,47//            TestStatus.Success, // final success is the foo context48//         )49//      }50//51//      test("isolation mode leaf + data classes with regular class param should show all tests in data testing") {52//53//         KotestEngineLauncher()54//            .withListener(listener)55//            .withSpec(DataClassWithNonDataParameterAndLeafIsolation::class)56//            .launch()57//58//         results shouldBe listOf(59//            TestStatus.Success,60//            TestStatus.Failure,61//            TestStatus.Success,62//            TestStatus.Success,63//            TestStatus.Failure,64//            TestStatus.Success,65//            TestStatus.Success,  // final success is the foo context66//         )67//      }...

KotestEngineLauncher

Using AI Code Generation

1val launcher = KotestEngineLauncher()2launcher.withClasses(AssertionTest::class)3launcher.execute()4val launcher = KotestEngineLauncher()5launcher.withSpec(AssertionTest)6launcher.execute()7val launcher = KotestEngineLauncher()8launcher.withSpecClass(AssertionTest::class)9launcher.execute()10val launcher = KotestEngineLauncher()11launcher.withSpecClass(AssertionTest::class)12launcher.execute()13val launcher = KotestEngineLauncher()14launcher.withSpecClass(AssertionTest::class)15launcher.execute()16val launcher = KotestEngineLauncher()17launcher.withSpecClass(AssertionTest::class)18launcher.execute()19val launcher = KotestEngineLauncher()20launcher.withSpecClass(AssertionTest::class)21launcher.execute()22val launcher = KotestEngineLauncher()23launcher.withSpecClass(AssertionTest::class)24launcher.execute()25val launcher = KotestEngineLauncher()26launcher.withSpecClass(AssertionTest::class)27launcher.execute()28val launcher = KotestEngineLauncher()29launcher.withSpecClass(AssertionTest::class)30launcher.execute()31val launcher = KotestEngineLauncher()32launcher.withSpecClass(AssertionTest::class)33launcher.execute()34val launcher = KotestEngineLauncher()35launcher.withSpecClass(AssertionTest::class)36launcher.execute()37val launcher = KotestEngineLauncher()38launcher.withSpecClass(AssertionTest::class)

KotestEngineLauncher

Using AI Code Generation

1val launcher = KotestEngineLauncher()2launcher.withSpecs(MyTest::class)3launcher.withClasses(MyTest::class)4launcher.withPackages("com.example")5launcher.withTags("slow")6launcher.withTests("com.example.MyTest#mytest")7launcher.withListener(TestEngineListener { event -> println(event) })8launcher.withTestEngineListener(TestEngineListener { event -> println(event) })

KotestEngineLauncher

Using AI Code Generation

1import io.kotest.core.config.AbstractProjectConfig2import io.kotest.core.extensions.Extension3import io.kotest.core.extensions.TestCaseExtension4import io.kotest.core.spec.style.BehaviorSpec5import io.kotest.engine.KotestEngineLauncher6import io.kotest.engine.listener.TestEngineListener7import io.kotest.engine.spec.SpecExecutor8import io.kotest.engine.spec.materializeAndOrderRootTests9import io.kotest.engine.test.TestCaseExecutionListener10import io.kotest.engine.test.status.TestStatus11import io.kotest.engine.test.status.TestStatusListener12import io.kotest.engine.test.status.TestStatusState13import io.kotest.mpp.log14import io.kotest.mpp.sysprop15class MySpec : BehaviorSpec() {16    init {17        given("a test") {18            `when`("a test is executed") {19                then("the test should pass") {20                }21            }22        }23    }24}25class MyProjectConfig : AbstractProjectConfig() {26    override fun extensions(): List<Extension> {27        return listOf(MyExtension())28    }29}30class MyExtension : TestCaseExtension {31    override suspend fun intercept(32        execute: suspend (TestCase) -> TestResult33    ): TestResult {34        log("MyExtension - ${testCase.description.name}")35        return execute(testCase)36    }37}38fun main() {39    KotestEngineLauncher()40        .withSpec(MySpec::class)41        .withListener(MyTestEngineListener())42        .launch()43}44class MyTestEngineListener : TestEngineListener {45    override fun engineStarted(classes: List<KClass<out Spec>>) {46        log("engineStarted")47    }48    override fun engineFinished(t: List<Throwable>) {49        log("engineFinished")50    }51    override fun specStarted(kclass: KClass<out Spec>) {52        log("specStarted")53    }54    override fun specIgnored(kclass: KClass<out Spec>, reason: String?) {55        log("specIgnored")56    }57    override fun specFinished(kclass: KClass<out Spec>, t: Throwable?) {58        log("specFinished")59    }60    override fun testStarted(testCase: TestCase) {61        log("testStarted")62    }63    override fun testIgnored(testCase

KotestEngineLauncher

Using AI Code Generation

1import io.kotest.core.spec.style.FunSpec2import io.kotest.engine.KotestEngineLauncher3import io.kotest.matchers.shouldBe4class KotestEngineLauncherTest : FunSpec({5    test("KotestEngineLauncher") {6        KotestEngineLauncher().execute(listOf(ClassWithTestAnnotation::class))7    }8})9class ClassWithTestAnnotation {10    companion object {11    }12    fun test() {13    }14}15import io.kotest.core.spec.style.FunSpec16import io.kotest.engine.KotestEngineLauncher17import io.kotest.matchers.shouldBe18class KotestEngineLauncherTest : FunSpec({19    test("KotestEngineLauncher") {20        KotestEngineLauncher().execute(listOf(ClassWithSpecAnnotation::class))21    }22})23class ClassWithSpecAnnotation : FunSpec({24    test("test") {25    }26})27class ClassWithSpecAnnotation {28    companion object {29    }30}31import io.kotest.core.spec.style.FunSpec32import io.kotest.engine.KotestEngineLauncher33import io.kotest.matchers.shouldBe34class KotestEngineLauncherTest : FunSpec({35    test("Kot

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.