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How to use launch method of io.kotest.engine.TestEngineLauncher class

Best Kotest code snippet using io.kotest.engine.TestEngineLauncher.launch

ExtensionErrorsTest.kt

Source:ExtensionErrorsTest.kt

...15      test("beforeSpec function overrides should be wrapped") {16         val collector = CollectingTestEngineListener()17         TestEngineLauncher(collector)18            .withClasses(BeforeSpecFunctionOverrideError::class)19            .launch()20         val error = collector.specs.values.first().errorOrNull21         error.shouldBeInstanceOf<ExtensionException.BeforeSpecException>()22      }23      test("beforeSpec DSL errors should be wrapped") {24         val collector = CollectingTestEngineListener()25         TestEngineLauncher(collector)26            .withClasses(BeforeSpecDSLError::class)27            .launch()28         val error = collector.specs.values.first().errorOrNull29         error.shouldBeInstanceOf<ExtensionException.BeforeSpecException>()30      }31      test("multiple beforeSpec should be collected") {32         val collector = CollectingTestEngineListener()33         TestEngineLauncher(collector)34            .withClasses(MultipleBeforeSpecErrors::class)35            .launch()36         val error = collector.specs.values.first().errorOrNull37         error.shouldBeInstanceOf<MultipleExceptions>()38         error.causes.shouldHaveSize(3)39         error.causes.forAll { it.shouldBeInstanceOf<ExtensionException.BeforeSpecException>() }40      }41      test("afterSpec function overrides should be wrapped") {42         val collector = CollectingTestEngineListener()43         TestEngineLauncher(collector)44            .withClasses(AfterSpecFunctionOverrideError::class)45            .launch()46         val error = collector.specs.values.first().errorOrNull47         error.shouldBeInstanceOf<ExtensionException.AfterSpecException>()48      }49      test("afterSpec DSL errors should be wrapped") {50         val collector = CollectingTestEngineListener()51         TestEngineLauncher(collector)52            .withClasses(AfterSpecDSLError::class)53            .launch()54         val error = collector.specs.values.first().errorOrNull55         error.shouldBeInstanceOf<ExtensionException.AfterSpecException>()56      }57      test("multiple afterSpec should be collected") {58         val collector = CollectingTestEngineListener()59         TestEngineLauncher(collector)60            .withClasses(MultipleAfterSpecErrors::class)61            .launch()62         val error = collector.specs.values.first().errorOrNull63         error.shouldBeInstanceOf<MultipleExceptions>()64         error.causes.shouldHaveSize(3)65         error.causes.forAll { it.shouldBeInstanceOf<ExtensionException.AfterSpecException>() }66      }67      test("beforeTest function overrides should be wrapped") {68         val collector = CollectingTestEngineListener()69         TestEngineLauncher(collector)70            .withClasses(BeforeTestFunctionOverrideError::class)71            .launch()72         val error = collector.tests.values.first().errorOrNull73         error.shouldBeInstanceOf<ExtensionException.BeforeTestException>()74      }75      test("beforeTest DSL errors should be wrapped") {76         val collector = CollectingTestEngineListener()77         TestEngineLauncher(collector)78            .withClasses(BeforeTestDSLError::class)79            .launch()80         val error = collector.tests.values.first().errorOrNull81         error.shouldBeInstanceOf<ExtensionException.BeforeTestException>()82      }83      test("multiple beforeTest errors should be collected") {84         val collector = CollectingTestEngineListener()85         TestEngineLauncher(collector)86            .withClasses(MultipleBeforeTestErrors::class)87            .launch()88         val error = collector.tests.values.first().errorOrNull89         error.shouldBeInstanceOf<MultipleExceptions>()90         error.causes.shouldHaveSize(3)91         error.causes.forAll { it.shouldBeInstanceOf<ExtensionException.BeforeTestException>() }92      }93      test("afterTest function overrides should be wrapped") {94         val collector = CollectingTestEngineListener()95         TestEngineLauncher(collector)96            .withClasses(AfterTestFunctionOverrideError::class)97            .launch()98         val error = collector.tests.values.first().errorOrNull99         error.shouldBeInstanceOf<ExtensionException.AfterTestException>()100      }101      test("afterTest DSL errors should be wrapped") {102         val collector = CollectingTestEngineListener()103         TestEngineLauncher(collector)104            .withClasses(AfterTestDSLError::class)105            .launch()106         val error = collector.tests.values.first().errorOrNull107         error.shouldBeInstanceOf<ExtensionException.AfterTestException>()108      }109      test("multiple afterTest errors should be collected") {110         val collector = CollectingTestEngineListener()111         TestEngineLauncher(collector)112            .withClasses(MultipleAfterTestErrors::class)113            .launch()114         val error = collector.tests.values.first().errorOrNull115         error.shouldBeInstanceOf<MultipleExceptions>()116         error.causes.shouldHaveSize(3)117         error.causes.forAll { it.shouldBeInstanceOf<ExtensionException.AfterTestException>() }118      }119   }120}121private class BeforeSpecFunctionOverrideError : FunSpec() {122   override suspend fun beforeSpec(spec: Spec) {123      error("foo")124   }125   init {126      test("a") { }127   }...

TestEngineLauncher.kt

Source:TestEngineLauncher.kt

...112         tagExpression = expression,113      )114   }115   /**116    * Returns a copy of this launcher with the given [extensions] added to the configuration.117    *118    * Note: If after invoking this method, the [withConfiguration] is invoked, then any changes119    * here will be lost.120    */121   fun withExtensions(vararg extensions: Extension): TestEngineLauncher = withExtensions(extensions.toList())122   /**123    * Returns a copy of this launcher with the given [extensions] added to the configuration.124    *125    * Note: If after invoking this method, the [withConfiguration] is invoked, then any changes126    * here will be lost.127    */128   fun withExtensions(extensions: List<Extension>): TestEngineLauncher {129      extensions.forEach { projectConfiguration.registry.add(it) }130      return this131   }132   fun withConfiguration(configuration: ProjectConfiguration): TestEngineLauncher {133      return TestEngineLauncher(134         listener = listener,135         projectConfiguration = configuration,136         configs = configs,137         refs = refs,138         tagExpression = tagExpression,139      )140   }141   fun toConfig(): TestEngineConfig {142      // if the engine was configured with explicit tags, we register those via a tag extension143      tagExpression?.let { projectConfiguration.registry.add(SpecifiedTagsTagExtension(it)) }144      return TestEngineConfig(145         listener = ThreadSafeTestEngineListener(146            PinnedSpecTestEngineListener(147               listener148            )149         ),150         interceptors = testEngineInterceptors(),151         configuration = ConfigManager.initialize(152            projectConfiguration,153            configs + detectAbstractProjectConfigs() + listOfNotNull(loadProjectConfigFromClassname())154         ),155         tagExpression,156      )157   }158   fun testSuite(): TestSuite = TestSuite(refs)159   /**160    * Launch the [TestEngine] in an existing coroutine without blocking.161    */162   suspend fun async(): EngineResult {163      log { "TestEngineLauncher: Launching Test Engine" }164      val engine = TestEngine(toConfig())165      return engine.execute(testSuite())166   }167   /**168    * Launch the [TestEngine] created from this builder and block the thread until execution has completed.169    * This method will throw on JS.170    */171   fun launch(): EngineResult {172      log { "TestEngineLauncher: Launching Test Engine" }173      return runBlocking {174         val engine = TestEngine(toConfig())175         engine.execute(testSuite())176      }177   }178   /**179    * Launch the [TestEngine] created from this builder using a Javascript promise.180    * This method will throw on JVM or native.181    */182   fun promise() {183      log { "TestEngineLauncher: Launching Test Engine in Javascript promise" }184      runPromise {185         val engine = TestEngine(toConfig())...

SystemPropertyFiltersTests.kt

Source:SystemPropertyFiltersTests.kt

...46         mapOf(47            KotestEngineProperties.filterSpecs to "",48            KotestEngineProperties.filterTests to ""49         )50      ) { TestEngineLauncher().withClasses(testSuite).withConfiguration(ProjectConfiguration()).launch() }51      numberOfTestsRunShouldBe(13)52   }53   test("filters a specific class") {54      withSystemProperties(55         mapOf(56            KotestEngineProperties.filterSpecs to "*DistantFutureSciFiTests",57            KotestEngineProperties.filterTests to ""58         )59      ) { TestEngineLauncher().withClasses(testSuite).withConfiguration(ProjectConfiguration()).launch() }60      numberOfTestsRunShouldBe(7)61   }62   test("filters a class prefix") {63      withSystemProperties(64         mapOf(65            KotestEngineProperties.filterSpecs to "*FutureSciFiTests",66            KotestEngineProperties.filterTests to ""67         )68      ) { TestEngineLauncher().withClasses(testSuite).withConfiguration(ProjectConfiguration()).launch() }69      numberOfTestsRunShouldBe(9)70   }71   test("filters a specific class and test") {72      withSystemProperties(73         mapOf(74            KotestEngineProperties.filterSpecs to "*NearFutureSciFiTests",75            KotestEngineProperties.filterTests to "Daedalus*"76         )77      ) { TestEngineLauncher().withClasses(testSuite).withConfiguration(ProjectConfiguration()).launch() }78      numberOfTestsRunShouldBe(1)79   }80   test("filters a test name with spaces") {81      withSystemProperties(82         mapOf(83            KotestEngineProperties.filterSpecs to "",84            KotestEngineProperties.filterTests to "trek tests*"85         )86      ) { TestEngineLauncher().withClasses(testSuite).withConfiguration(ProjectConfiguration()).launch() }87      numberOfTestsRunShouldBe(3)88   }89   test("filters all classes in a package") {90      withSystemProperties(91         mapOf(92            KotestEngineProperties.filterSpecs to "com.sksamuel.kotest.engine.interceptors.filters1.*",93            KotestEngineProperties.filterTests to ""94         )95      ) { TestEngineLauncher().withClasses(testSuite).withConfiguration(ProjectConfiguration()).launch() }96      numberOfTestsRunShouldBe(2)97   }98   test("filters nested tests in a context") {99      withSystemProperties(100         mapOf(101            KotestEngineProperties.filterSpecs to "",102            KotestEngineProperties.filterTests to "expanse tests*"103         )104      ) { TestEngineLauncher().withClasses(testSuite).withConfiguration(ProjectConfiguration()).launch() }105      numberOfTestsRunShouldBe(4)106   }107   test("filter tests using prefix and suffix wildcard") {108      withSystemProperties(109         mapOf(110            KotestEngineProperties.filterSpecs to "",111            KotestEngineProperties.filterTests to "*anse tes*"112         )113      ) { TestEngineLauncher().withClasses(testSuite).withConfiguration(ProjectConfiguration()).launch() }114      numberOfTestsRunShouldBe(4)115   }116   test("filter tests with prefix wildcard") {117      withSystemProperties(118         mapOf(119            KotestEngineProperties.filterSpecs to "",120            KotestEngineProperties.filterTests to "*BC-304"121         )122      ) { TestEngineLauncher().withClasses(testSuite).withConfiguration(ProjectConfiguration()).launch() }123      numberOfTestsRunShouldBe(2)124      testsRunShouldBe("Daedalus BC-304", "Odyssey BC-304")125   }126})127private class DistantFutureSciFiTests : FunSpec({128   context("trek tests") {129      test("Enterprise NCC-1701") { testAndIncrementCounter() }130      test("Excelsior NCC-2000") { testAndIncrementCounter() }131      test("Defiant NX-74205") { testAndIncrementCounter() }132   }133   context("expanse tests") {134      test("MCRN Donnager") { testAndIncrementCounter() }135      test("Rocinante") { testAndIncrementCounter() }136      test("UNN Arboghast") { testAndIncrementCounter() }...

IgnoredTestReasonTest.kt

Source:IgnoredTestReasonTest.kt

...14      test("enabledOrReasonIf should report the reason for skipping") {15         val collector = CollectingTestEngineListener()16         TestEngineLauncher(collector)17            .withClasses(EnabledOrReasonIfSpec::class)18            .launch()19         collector.tests.toList().first().second.reasonOrNull shouldBe "wobble"20      }21      test("EnabledExtension should report the reason for skipping") {22         val ext = object : EnabledExtension {23            override suspend fun isEnabled(descriptor: Descriptor): Enabled = Enabled.disabled("wibble")24         }25         val c = ProjectConfiguration().apply { registry.add(ext) }26         val collector = CollectingTestEngineListener()27         TestEngineLauncher(collector)28            .withClasses(MyFunSpec::class)29            .withConfiguration(c)30            .launch()31         collector.tests.toList().first().second.reasonOrNull shouldBe "wibble"32      }33      test("xdisabled in fun spec should report the reason for skipping") {34         val collector = CollectingTestEngineListener()35         TestEngineLauncher(collector)36            .withClasses(XReasonFunSpec::class)37            .launch()38         collector.tests.toList().first().second.reasonOrNull shouldBe "Disabled by xmethod"39      }40      test("xdisabled in describe spec should report the reason for skipping") {41         val collector = CollectingTestEngineListener()42         TestEngineLauncher(collector)43            .withClasses(XReasonDescribeSpec::class)44            .launch()45         collector.tests.toList().first().second.reasonOrNull shouldBe "Disabled by xmethod"46      }47      test("xdisabled in should spec should report the reason for skipping") {48         val collector = CollectingTestEngineListener()49         TestEngineLauncher(collector)50            .withClasses(XReasonShouldSpec::class)51            .launch()52         collector.tests.toList().first().second.reasonOrNull shouldBe "Disabled by xmethod"53      }54      test("enabled should report some reason for skipping") {55         val collector = CollectingTestEngineListener()56         TestEngineLauncher(collector)57            .withClasses(EnabledSpec::class)58            .launch()59         collector.tests.toList().first().second.reasonOrNull shouldBe "Disabled by enabled flag in config"60      }61      test("enabledIf should report some reason for skipping") {62         val collector = CollectingTestEngineListener()63         TestEngineLauncher(collector)64            .withClasses(EnabledIfSpec::class)65            .launch()66         collector.tests.toList().first().second.reasonOrNull shouldBe "Disabled by enabledIf flag in config"67      }68      test("bang should report some reason for skipping") {69         val collector = CollectingTestEngineListener()70         TestEngineLauncher(collector)71            .withClasses(BangSpec::class)72            .launch()73         collector.tests.toList().first().second.reasonOrNull shouldBe "Disabled by bang"74      }75   }76}77private class BangSpec : FunSpec() {78   init {79      test("!a") {80         throw RuntimeException()81      }82   }83}84private class EnabledSpec : FunSpec() {85   init {86      test("a").config(enabled = false) {...

ActionTest.kt

Source:ActionTest.kt

...106                    ActionTestSpec(actionTestData.action, reportScreen)107                }, ActionTestSpec::class)108                TestEngineLauncher(collector, projectConfiguration, emptyList(), listOf(ref), null)109                    .withExtensions()110                    .launch()111                Then("check test name") {112                    collector.result(actionTestData.name)?.isSuccess shouldBe true113                }114                Then("check report", actionTestData.reportScreenNumberCheck)115                Then("check model", actionTestData.reportScreenModelCheck)116            }117        }118    }119})...

launcher.kt

Source:launcher.kt

1package launcher2import io.kotest.core.TagExpression3import io.kotest.core.descriptors.Descriptor4import io.kotest.core.descriptors.append5import io.kotest.core.descriptors.toDescriptor6import io.kotest.core.filter.TestFilter7import io.kotest.core.filter.TestFilterResult8import io.kotest.core.spec.Spec9import io.kotest.engine.TestEngineLauncher10import io.kotest.engine.listener.TestEngineListener11import io.kotest.framework.discovery.Discovery12import io.kotest.framework.discovery.DiscoveryRequest13import io.kotest.framework.discovery.DiscoveryResult14import io.kotest.framework.discovery.DiscoverySelector15import kotlin.reflect.KClass16/**17 * Creates a [TestEngineLauncher] to be used to launch the test engine.18 */19internal fun setupLauncher(20   args: LauncherArgs,21   listener: TestEngineListener,22): Result<TestEngineLauncher> = runCatching {23   val specClass = args.spec?.let { (Class.forName(it) as Class<Spec>).kotlin }24   val (specs, _, error) = specs(specClass, args.packageName)25   val filter = if (args.testpath == null || specClass == null) null else {26      TestPathTestCaseFilter(args.testpath, specClass)27   }28   if (error != null) throw error29   TestEngineLauncher(listener)30      .withExtensions(listOfNotNull(filter))31      .withTagExpression(args.tagExpression?.let { TagExpression(it) })32      .withClasses(specs)33}34/**35 * Returns the spec classes to execute by using an FQN class name, a package scan,36 * or a full scan.37 */38private fun specs(specClass: KClass<out Spec>?, packageName: String?): DiscoveryResult {39   // if the spec class was null, then we perform discovery to locate all the classes40   // otherwise that specific spec class is used41   return when (specClass) {42      null -> scan(packageName)43      else -> DiscoveryResult(listOf(specClass), emptyList(), null)44   }45}46private fun scan(packageName: String?): DiscoveryResult {47   val packageSelector = packageName?.let { DiscoverySelector.PackageDiscoverySelector(it) }48   val req = DiscoveryRequest(selectors = listOfNotNull(packageSelector))49   val discovery = Discovery(emptyList())50   return discovery.discover(req)51}52/**53 * Compares test descriptions to a given test path (delimited with ' -- ').54 * The comparison ignores test prefixes, so an application using the launcher should not55 * include test name prefixes in the test path.56 */57private class TestPathTestCaseFilter(58   private val testPath: String,59   spec: KClass<out Spec>,60) : TestFilter {61   private val target1 = testPath.trim().split(Descriptor.TestDelimiter)62      .fold(spec.toDescriptor() as Descriptor) { desc, name ->63         desc.append(name.trim())64      }65   // this is a hack where we append "should" to the first name, until 5.0 where we will66   // store names with affixes separately (right now word spec is adding them to the names at source)67   var should = true68   private val target2 = testPath.trim().split(Descriptor.TestDelimiter)...

UnfinishedTestDefinitionTest.kt

Source:UnfinishedTestDefinitionTest.kt

...16      }17      test("fun spec") {18         val result = TestEngineLauncher(NoopTestEngineListener)19            .withClasses(FunSpecUnfinishedTestDefinitionTest::class)20            .launch()21         result.errors.forAtLeastOne { it.message!!.shouldContain("unfinished test") }22      }23      test("describe spec") {24         val result = TestEngineLauncher(NoopTestEngineListener)25            .withClasses(DescribeSpecUnfinishedTestDefinitionTest::class)26            .launch()27         result.errors.forAtLeastOne { it.message!!.shouldContain("unfinished it") }28      }29      test("should spec") {30         val result = TestEngineLauncher(NoopTestEngineListener)31            .withClasses(ShouldSpecUnfinishedTestDefinitionTest::class)32            .launch()33         result.errors.forAtLeastOne { it.message!!.shouldContain("unfinished should") }34      }35      test("feature spec") {36         val result = TestEngineLauncher(NoopTestEngineListener)37            .withClasses(FeatureSpecUnfinishedTestDefinitionTest::class)38            .launch()39         result.errors.forAtLeastOne { it.message!!.shouldContain("unfinished scenario") }40      }41      test("expect spec") {42         val result = TestEngineLauncher(NoopTestEngineListener)43            .withClasses(ExpectSpecUnfinishedTestDefinitionTest::class)44            .launch()45         result.errors.forAtLeastOne { it.message!!.shouldContain("unfinished expect") }46      }47   }48}49private class FunSpecUnfinishedTestDefinitionTest : FunSpec({50   context("context") {51      test("unfinished test")52   }53})54private class FeatureSpecUnfinishedTestDefinitionTest : FeatureSpec({55   feature("feature") {56      scenario("unfinished scenario")57   }58})...

KotestUnit.kt

Source:KotestUnit.kt

...32      }33      TestEngineLauncher()34         .withListener(listener)35         .withClasses(klass)36         .launch()37   }38}...

launch

Using AI Code Generation

1TestEngineLauncher("io.kotest.engine.KotestEngine").withSpecs(specs).launch()2TestEngineLauncher("io.kotest.engine.KotestEngine").withSpecs(specs).launch()3TestEngineLauncher("io.kotest.engine.KotestEngine").withSpecs(specs).launch()4TestEngineLauncher("io.kotest.engine.KotestEngine").withSpecs(specs).launch()5TestEngineLauncher("io.kotest.engine.KotestEngine").withSpecs(specs).launch()6TestEngineLauncher("io.kotest.engine.KotestEngine").withSpecs(specs).launch()7TestEngineLauncher("io.kotest.engine.KotestEngine").withSpecs(specs).launch()8TestEngineLauncher("io.kotest.engine.KotestEngine").withSpecs(specs).launch()9TestEngineLauncher("io.kotest.engine.KotestEngine").withSpecs(specs).launch()10TestEngineLauncher("io.kotest.engine.KotestEngine").withSpecs(specs).launch()11TestEngineLauncher("io.kotest.engine.KotestEngine").withSpecs(specs).launch()12TestEngineLauncher("io.kotest.engine.KotestEngine").withSpecs(specs).launch()13TestEngineLauncher("io.kotest.engine.KotestEngine").withSpecs(specs).launch()

launch

Using AI Code Generation

1        val launcher = TestEngineLauncher()2        launcher.withArguments(args)3        launcher.execute()4        val launcher = TestEngineLauncher()5        launcher.withArguments(args)6        launcher.execute(object : TestEngineListener {7            override fun engineStarted(classes: List<KClass<out Spec>>) {8                println("Starting Kotest")9            }10            override fun engineFinished(t: List<Throwable>) {11                println("Finished Kotest")12            }13        })14    }15}

launch

Using AI Code Generation

1import io.kotest.core.config.configuration2import io.kotest.engine.TestEngineLauncher3import io.kotest.engine.config.EngineConfiguration4import io.kotest.engine.config.engineConfiguration5import io.kotest.engine.config.writeSpecFailureFile6import io.kotest.engine.listener.PrintStreamTestEngineListener7import io.kotest.engine.listener.TestEngineListener8import io.kotest.engine.listener.TestEngineListenerErrorAdapter9import io.kotest.engine.spec.SpecExecutor10import io.kotest.engine.test.TestCaseExecutor11import io.kotest.engine.test.interceptors.TestCaseExecutionInterceptor12import io.kotest.engine.test.interceptors.TestCaseFinalizeInterceptor13import io.kotest.engine.test.interceptors.TestCaseInitializeInterceptor14import io.kotest.engine.test.interceptors.TestCaseInterceptors15import io.kotest.engine.test.interceptors.TestCaseRetryInterceptor16import io.kotest.engine.test.interceptors.TestCaseTimeoutInterceptor17import io.kotest.engine.test.interceptors.TestCaseValidateInterceptor18import io.kotest.engine.test.interceptors.TestCaseWrapInterceptor19import io.kotest.engine.test.status.Status20import io.kotest.engine.test.status.TestStatus21import io.kotest.engine.test.status.TestStatusScope22import io.kotest.engine.test.status.toTestStatus23import io.kotest.engine.test.status.toTestStatusScope24import io.kotest.engine.test.toTestCase25import io.kotest.engine.test.toTestResult26import io.kotest.engine.test.toTestSuite27import io.kotest.engine.test.toTestSuiteEntry28import io.kotest.engine.test.toTestSuiteResult29import io.kotest.engine.test.toTestSuiteScope30import io.kotest.engine.test.toTestSuiteScopeEntry31import io.kotest.engine.test.toTestSuiteScopeResult32import io.kotest.engine.test.toTestSuiteScopeResultEntry33import io.kotest.engine.test.toTestSuiteScopeResultEntryStatus34import io.kotest.engine.test.toTestSuiteScopeResultStatus35import io.kotest.engine.test.toTestSuiteScopeStatus36import io.kotest.engine.test.toTestSuiteStatus37import io.kotest.engine.test.toTestSuiteStatusEntry38import io.kotest.engine.test.toTestSuiteStatusResult39import io.kotest.engine.test

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