Best Kotest code snippet using io.kotest.core.spec.AutoCloseable
TestConfiguration.kt
Source:TestConfiguration.kt  
...12import io.kotest.core.spec.AfterEach13import io.kotest.core.spec.AfterSpec14import io.kotest.core.spec.AfterTest15import io.kotest.core.spec.AroundTestFn16import io.kotest.core.spec.AutoCloseable17import io.kotest.core.spec.BeforeAny18import io.kotest.core.spec.BeforeContainer19import io.kotest.core.spec.BeforeEach20import io.kotest.core.spec.BeforeSpec21import io.kotest.core.spec.BeforeTest22import io.kotest.core.spec.Spec23import io.kotest.core.spec.TestCaseExtensionFn24import io.kotest.core.test.AssertionMode25import io.kotest.core.test.TestCase26import io.kotest.core.test.TestResult27import io.kotest.core.test.TestType28import io.kotest.core.test.config.TestCaseConfig29import kotlin.js.JsName30/**31 * An abstract base implementation for shared configuration between [Spec] and [TestFactoryConfiguration].32 */33abstract class TestConfiguration {34   @JsName("_tags")35   internal var _tags: Set<Tag> = emptySet()36   @JsName("_extensions")37   internal var _extensions = emptyList<Extension>()38   private var _autoCloseables = emptyList<Lazy<AutoCloseable>>()39   /**40    * Config applied to each test case if not overridden per test case.41    * If null, then defaults to the project level default.42    *43    * Any test case config set a test itself will override any value here.44    */45   @Deprecated("These settings should be specified individually to provide finer grain control. Deprecated since 5.0")46   var defaultTestConfig: TestCaseConfig? = null47   /**48    * Sets an assertion mode which is applied to every test.49    * If null, then the project default is used.50    */51   var assertions: AssertionMode? = null52   var assertSoftly: Boolean? = null53   /**54    * Register a single [TestListener] of type T return that listener.55    */56   @SoftDeprecated("Use register")57   fun <T : TestListener> listener(listener: T): T {58      return register(listener)59   }60   /**61    * Register multiple [TestListener]s.62    */63   @SoftDeprecated("Use register")64   fun listeners(listeners: List<TestListener>) {65      register(listeners)66   }67   /**68    * Register multiple [TestListener]s.69    */70   @SoftDeprecated("Use register")71   fun listeners(vararg listeners: TestListener) = register(listeners.toList())72   /**73    * Register a single [TestListener] of type T return that listener.74    */75   fun <T : TestListener> register(extension: T): T {76      register(listOf(extension))77      return extension78   }79   /**80    * Register a single [TestCaseExtension] of type T return that extension.81    */82   fun <T : Extension> extension(extension: T): T {83      extensions(extension)84      return extension85   }86   fun register(vararg extensions: Extension) {87      register(extensions.toList())88   }89   fun register(extensions: List<Extension>) {90      _extensions = _extensions + extensions91   }92   /**93    * Register multiple [Extension]s.94    */95   fun extensions(vararg extensions: Extension) {96      register(extensions.toList())97   }98   /**99    * Register multiple [Extension]s.100    */101   fun extensions(extensions: List<Extension>) {102      register(extensions)103   }104   /**105    * Adds [Tag]s to this spec or factory, which will be applied to each test case.106    *107    * When applied in a factory, only tests generated from that factory will have the tags applied.108    * When applied to a spec, all tests will have the tags applied.109    */110   fun tags(vararg tags: Tag) {111      _tags = _tags + tags.toSet()112   }113   fun appliedTags() = _tags114   /**115    * Registers an [AutoCloseable] to be closed when the spec is completed.116    */117   @Suppress("PropertyName")118   fun <T : AutoCloseable> autoClose(closeable: T): T =119      autoClose(lazy(LazyThreadSafetyMode.NONE) { closeable }).value120   /**121    * Registers a lazy [AutoCloseable] to be closed when the spec is completed.122    */123   fun <T : AutoCloseable> autoClose(closeable: Lazy<T>): Lazy<T> {124      _autoCloseables = listOf(closeable) + _autoCloseables125      return closeable126   }127   /**128    * Registers a callback to be executed before every [TestCase].129    *130    * The [TestCase] about to be executed is provided as the parameter.131    */132   open fun beforeTest(f: BeforeTest) {133      register(object : TestListener {134         override suspend fun beforeAny(testCase: TestCase) {135            f(testCase)136         }137      })138   }139   /**140    * Registers a callback to be executed after every [TestCase].141    *142    * The callback provides two parameters - the test case that has just completed,143    * and the [TestResult] outcome of that test.144    */145   open fun afterTest(f: AfterTest) {146      register(object : AfterTestListener {147         override suspend fun afterAny(testCase: TestCase, result: TestResult) {148            f(Tuple2(testCase, result))149         }150      })151   }152   /**153    * Registers a callback to be executed before every [TestCase]154    * with type [TestType.Container].155    *156    * The [TestCase] about to be executed is provided as the parameter.157    */158   fun beforeContainer(f: BeforeContainer) {159      register(object : BeforeContainerListener {160         override suspend fun beforeContainer(testCase: TestCase) {161            f(testCase)162         }163      })164   }165   /**166    * Registers a callback to be executed after every [TestCase]167    * with type [TestType.Container].168    *169    * The callback provides two parameters - the test case that has just completed,170    * and the [TestResult] outcome of that test.171    */172   fun afterContainer(f: AfterContainer) {173      register(object : AfterContainerListener {174         override suspend fun afterContainer(testCase: TestCase, result: TestResult) {175            f(Tuple2(testCase, result))176         }177      })178   }179   /**180    * Registers a callback to be executed before every [TestCase]181    * with type [TestType.Test].182    *183    * The [TestCase] about to be executed is provided as the parameter.184    */185   fun beforeEach(f: BeforeEach) {186      register(object : TestListener {187         override suspend fun beforeEach(testCase: TestCase) {188            f(testCase)189         }190      })191   }192   /**193    * Registers a callback to be executed after every [TestCase]194    * with type [TestType.Test].195    *196    * The callback provides two parameters - the test case that has just completed,197    * and the [TestResult] outcome of that test.198    */199   fun afterEach(f: AfterEach) {200      register(object : TestListener {201         override suspend fun afterEach(testCase: TestCase, result: TestResult) {202            f(Tuple2(testCase, result))203         }204      })205   }206   /**207    * Registers a callback to be executed before every [TestCase]208    * with type [TestType.Test] or [TestType.Container].209    *210    * The [TestCase] about to be executed is provided as the parameter.211    */212   fun beforeAny(f: BeforeAny) {213      register(object : TestListener {214         override suspend fun beforeAny(testCase: TestCase) {215            f(testCase)216         }217      })218   }219   /**220    * Registers a callback to be executed after every [TestCase]221    * with type [TestType.Container] or [TestType.Test].222    *223    * The callback provides two parameters - the test case that has just completed,224    * and the [TestResult] outcome of that test.225    */226   fun afterAny(f: AfterAny) {227      register(object : TestListener {228         override suspend fun afterAny(testCase: TestCase, result: TestResult) {229            f(Tuple2(testCase, result))230         }231      })232   }233   /**234    * Registers a callback to be executed before any tests in this spec.235    * The spec instance is provided as a parameter.236    */237   fun beforeSpec(f: BeforeSpec) {238      register(object : TestListener {239         override suspend fun beforeSpec(spec: Spec) {240            f(spec)241         }242      })243   }244   /**245    * Register an extension callback246    */247   fun extension(f: TestCaseExtensionFn) {248      extension(object : TestCaseExtension {249         override suspend fun intercept(testCase: TestCase, execute: suspend (TestCase) -> TestResult): TestResult =250            f(Tuple2(testCase, execute))251      })252   }253   /**254    * Registers a callback to be executed after all tests in this spec.255    * The spec instance is provided as a parameter.256    */257   open fun afterSpec(f: AfterSpec) {258      register(object : TestListener {259         override suspend fun afterSpec(spec: Spec) {260            f(spec)261         }262      })263   }264   fun aroundTest(aroundTestFn: AroundTestFn) {265      extension(object : TestCaseExtension {266         override suspend fun intercept(testCase: TestCase, execute: suspend (TestCase) -> TestResult): TestResult {267            val f: suspend (TestCase) -> TestResult = { execute(it) }268            return aroundTestFn(Tuple2(testCase, f))269         }270      })271   }272   fun registeredAutoCloseables(): List<Lazy<AutoCloseable>> = _autoCloseables.toList()273   /**274    * Returns any [Extension] instances registered directly on this class.275    */276   fun registeredExtensions(): List<Extension> {277      return _extensions.toList()278   }279}...LoungeControllerTest.kt
Source:LoungeControllerTest.kt  
...134    controller.adapter.get(0)135    notified shouldBe 0136  }137  test("Possess tag during build") {138    val tags = mutableListOf<AutoCloseable>()139    val closedKey = mutableListOf<String>()140    var key = "key1"141    val controller = object : LoungeController(owner.lifecycle, dispatcher) {142      override suspend fun buildModels() {143        val k = key144        val tag = possessTagDuringBuilding(k, AutoCloseable::class) {145          AutoCloseable { closedKey += k }146        }147        tags += tag148      }149    }150    owner.lifecycle.currentState = Lifecycle.State.STARTED151    controller.requestModelBuild()152    controller.requestModelBuild()153    tags.size shouldBe 2154    tags.distinct().size shouldBe 1155    closedKey.isEmpty() shouldBe true156    key = "key2"157    controller.requestModelBuild()158    tags.size shouldBe 3159    tags.distinct().size shouldBe 2...DefaultJobExecutorsSpec.kt
Source:DefaultJobExecutorsSpec.kt  
...12    val config = KJob.Configuration().apply {13        blockingMaxJobs = 114        nonBlockingMaxJobs = 115    }16    private fun newTestee(): JobExecutors = autoClose(object : AutoCloseable, JobExecutors by DefaultJobExecutors(config) {17        override fun close() {18            shutdown()19        }20    })21    init {22        should("execute coroutine when resources are available again") {23            forAll(*newTestee().dispatchers.map { row(it.value) }.toTypedArray()) { dispatcher ->24                dispatcher.shouldNotBeNull()25                val latch1 = CountDownLatch(1)26                val latch2 = CountDownLatch(2)27                dispatcher.canExecute() shouldBe true28                CoroutineScope(dispatcher.coroutineDispatcher).launch {29                    latch1.await()30                }...AutoCloseTest.kt
Source:AutoCloseTest.kt  
...18      ThirdAutoclose.closed shouldBe 119   }20}21private val closedNumber = AtomicInteger(0)22private object FirstAutoclose : AutoCloseable {23   var closed = -124   override fun close() {25      closed = closedNumber.incrementAndGet()26   }27}28private object SecondAutoclose : AutoCloseable {29   var closed = -130   override fun close() {31      closed = closedNumber.incrementAndGet()32   }33}34private object ThirdAutoclose : AutoCloseable {35   var closed = -136   override fun close() {37      closed = closedNumber.incrementAndGet()38   }39}...AutoCloseable.kt
Source:AutoCloseable.kt  
...11    limitations under the License.12*/13package batect.dockerclient14import io.kotest.core.TestConfiguration15actual fun <T : AutoCloseable> TestConfiguration.closeAfterTest(instance: T): T {16    autoClose(object : io.kotest.core.spec.AutoCloseable {17        override fun close() {18            instance.close()19        }20    })21    return instance22}MockServerListener.kt
Source:MockServerListener.kt  
...8 * will be used (found via [mockServer])9 */10class MockServerListener(11  private vararg val port: Int = intArrayOf()12) : TestListener, AutoCloseable {13   // this has to be a var because MockServer starts the server as soon as you instantiate the instance :(14   lateinit var mockServer: ClientAndServer15   override suspend fun beforeSpec(spec: Spec) {16      super.beforeSpec(spec)17      mockServer = startClientAndServer(*port.toTypedArray())18   }19   override suspend fun afterSpec(spec: Spec) {20      mockServer.stop()21   }22   override fun close() {23      mockServer.stop()24   }25}...AutoCloseDslTest.kt
Source:AutoCloseDslTest.kt  
...4import io.kotest.matchers.booleans.shouldBeTrue5class AutoCloseDslTest : FunSpec({6   var beforeTests = true7   var closed = false8   val closeme = AutoCloseable { closed = true }9   autoClose(closeme)10   val lazyClosed by autoClose(lazy {11      beforeTests = false12      LazyCloseable()13   })14   beforeTests.shouldBeTrue()15   test("auto close with dsl method") {16      closed.shouldBeFalse()17   }18   test("lazy auto close with dsl method") {19      lazyClosed.closed.shouldBeFalse()20   }21   afterSpec {22      closed.shouldBeTrue()23      lazyClosed.closed.shouldBeTrue()24   }25}) {26   class LazyCloseable : AutoCloseable {27      var closed = false28      override fun close() {29         closed = true30      }31   }32}...LazyAutoCloseTest.kt
Source:LazyAutoCloseTest.kt  
...4import io.kotest.matchers.booleans.shouldBeTrue5class LazyAutoCloseTest : StringSpec({6   var fullLazy = true7   var closed = false8   val closeme = AutoCloseable { closed = true }9   autoClose(lazy {10      fullLazy = false11      closeme12   })13   "autoClose lazy should be lazy" {14      fullLazy.shouldBeTrue()15      closed.shouldBeFalse()16   }17   afterProject {18      // If never used in the Spec it should never get initialised, or closed19      fullLazy.shouldBeTrue()20      closed.shouldBeFalse()21   }22})...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.
You could also refer to video tutorials over LambdaTest YouTube channel to get step by step demonstration from industry experts.
Get 100 minutes of automation test minutes FREE!!
