How to use instantiate method of io.kotest.core.extensions.ConstructorExtension class

Best Kotest code snippet using io.kotest.core.extensions.ConstructorExtension.instantiate

MicronautKotestExtension.kt

Source:MicronautKotestExtension.kt Github

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...65 override suspend fun afterContainer(testCase: TestCase, result: TestResult) {66 contexts[testCase.spec.javaClass.name]?.afterInvocation(testCase)67 }68 @Suppress("UNCHECKED_CAST")69 override fun <T : Spec> instantiate(clazz: KClass<T>): Spec? {70 val constructor = clazz.primaryConstructor71 val testClass: Class<Any> = clazz.java as Class<Any>72 var micronautTestValue = testClass73 .annotations74 .filterIsInstance<MicronautTest>()75 .map { micronautTest -> buildValueObject(micronautTest) }76 .firstOrNull()77 return if (micronautTestValue == null) {78 null79 } else {80 val createBean = constructor != null && constructor.parameters.isNotEmpty()81 val context = MicronautKotestContext(testClass, micronautTestValue, createBean)82 contexts[testClass.name] = context83 if (createBean) {...

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MicronautKotest5Extension.kt

Source:MicronautKotest5Extension.kt Github

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...64 override suspend fun afterContainer(testCase: TestCase, result: TestResult) {65 contexts[testCase.spec.javaClass.name]?.afterInvocation(testCase)66 }67 @Suppress("UNCHECKED_CAST")68 override fun <T : Spec> instantiate(clazz: KClass<T>): Spec? {69 val constructor = clazz.primaryConstructor70 val testClass: Class<Any> = clazz.java as Class<Any>71 val micronautTestValue = testClass72 .annotations73 .filterIsInstance<MicronautTest>()74 .map { micronautTest -> buildValueObject(micronautTest) }75 .firstOrNull()76 return if (micronautTestValue == null) {77 null78 } else {79 val createBean = constructor != null && constructor.parameters.isNotEmpty()80 val context = MicronautKotest5Context(testClass, micronautTestValue, createBean)81 contexts[testClass.name] = context82 if (createBean) {...

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RobolectricExtension.kt

Source:RobolectricExtension.kt Github

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...29 builder.setSdk(sdk)30 }31 }.build()32 }33 override fun <T : Spec> instantiate(clazz: KClass<T>): Spec? {34 clazz.findAnnotation<RobolectricTest>() ?: return null35 return ContainedRobolectricRunner(clazz.getConfig())36 .sdkEnvironment.bootstrappedClass<Spec>(clazz.java).newInstance()37 }38 override suspend fun intercept(spec: Spec, execute: suspend (Spec) -> Unit) {39 spec::class.findAnnotation<RobolectricTest>() ?: return execute(spec)40 val containedRobolectricRunner = ContainedRobolectricRunner(spec::class.getConfig())41 beforeSpec(containedRobolectricRunner)42 execute(spec)43 afterSpec(containedRobolectricRunner)44 }45 private fun beforeSpec(containedRobolectricRunner: ContainedRobolectricRunner) {46 Thread.currentThread().contextClassLoader =47 containedRobolectricRunner.sdkEnvironment.robolectricClassLoader...

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RobolectricTestCaseExtension.kt

Source:RobolectricTestCaseExtension.kt Github

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...15 * https://github.com/kotest/kotest/blob/master/kotest-extensions/kotest-extensions-robolectric/src/jvmMain/kotlin/io/kotest/extensions/robolectric/RobolectricExtension.kt16 */17class RobolectricTestCaseExtension : ConstructorExtension, TestCaseExtension {18 private val containedRobolectricRunner = ContainedRobolectricRunner()19 override fun <T : Spec> instantiate(clazz: KClass<T>): Spec? {20 if (clazz.isNotRobolectricClass()) return null21 return containedRobolectricRunner.sdkEnvironment.bootstrappedClass<Spec>(clazz.java)22 .newInstance()23 }24 private fun <T : Spec> KClass<T>.isNotRobolectricClass() =25 findAnnotation<RobolectricTest>() == null26 override suspend fun intercept(27 testCase: TestCase,28 execute: suspend (TestCase) -> TestResult29 ): TestResult {30 if (testCase.spec::class.isNotRobolectricClass()) {31 return execute(testCase)32 }33 val containedRobolectricRunner = ContainedRobolectricRunner()...

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instantiateSpec.kt

Source:instantiateSpec.kt Github

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...4import io.kotest.core.extensions.PostInstantiationExtension5import io.kotest.core.spec.Spec6import kotlin.reflect.KClass7import kotlin.reflect.jvm.isAccessible8internal actual suspend fun instantiate(kclass: KClass<*>, registry: ExtensionRegistry): Result<Spec> {9 return createAndInitializeSpec(kclass as KClass<out Spec>, registry)10}11/**12 * Creates an instance of a [Spec] by delegating to [ConstructorExtension], with13 * a fallback to a reflection based zero-args constructor.14 *15 * If the [kclass] represents an object, then the singleton object instance will be returned.16 *17 * After creation any [PostInstantiationExtension]s will be invoked.18 */19suspend fun <T : Spec> createAndInitializeSpec(kclass: KClass<T>, registry: ExtensionRegistry): Result<Spec> {20 return when (val obj = kclass.objectInstance) {21 null -> runCatching {22 val initial: Spec? = null23 val spec = registry24 .all()25 .filterIsInstance<ConstructorExtension>()26 .fold(initial) { spec, ext -> spec ?: ext.instantiate(kclass) } ?: javaReflectNewInstance(kclass)27 registry28 .all()29 .filterIsInstance<PostInstantiationExtension>()30 .fold(spec) { acc, ext -> ext.instantiated(acc) }31 }32 else -> Result.success(obj)33 }.onSuccess { spec ->34 spec.globalExtensions().forEach { registry.add(it) }35 }36}37internal fun <T : Spec> javaReflectNewInstance(clazz: KClass<T>): Spec {38 try {39 val constructor = clazz.constructors.find { it.parameters.isEmpty() }40 ?: throw SpecInstantiationException(41 "Could not create instance of $clazz. Specs must have a public zero-arg constructor.",42 null43 )44 constructor.isAccessible = true...

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RobolectricSpecExtension.kt

Source:RobolectricSpecExtension.kt Github

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...11 * https://github.com/kotest/kotest/blob/master/kotest-extensions/kotest-extensions-robolectric/src/jvmMain/kotlin/io/kotest/extensions/robolectric/RobolectricExtension.kt12 */13class RobolectricSpecExtension : ConstructorExtension, SpecExtension {14 private val containedRobolectricRunner = ContainedRobolectricRunner()15 override fun <T : Spec> instantiate(clazz: KClass<T>): Spec? {16 if (clazz.isNotRobolectricClass()) return null17 return containedRobolectricRunner.sdkEnvironment.bootstrappedClass<Spec>(clazz.java)18 .newInstance()19 }20 private fun <T : Spec> KClass<T>.isNotRobolectricClass() =21 findAnnotation<RobolectricTest>() == null22 override suspend fun intercept(spec: KClass<out Spec>, process: suspend () -> Unit) {23 if (spec.isNotRobolectricClass()) {24 process()25 return26 }27 val containedRobolectricRunner = ContainedRobolectricRunner()28 beforeTest(containedRobolectricRunner)29 process()...

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SpringAutowireConstructorExtension.kt

Source:SpringAutowireConstructorExtension.kt Github

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...6import org.springframework.test.context.TestContextManager7import kotlin.reflect.KClass8import kotlin.reflect.full.primaryConstructor9/**10 * A [ConstructorExtension] which will attempt to instantiate test classes if they have a11 * non-zero arg constructor.12 *13 * The extension will delegate to spring's [TestContextManager] to autowire the constructors.14 */15@AutoScan16object SpringAutowireConstructorExtension : ConstructorExtension {17 override fun <T : Spec> instantiate(clazz: KClass<T>): Spec? {18 // we only instantiate via spring if there's actually parameters in the constructor19 // otherwise there's nothing to inject there20 val constructor = clazz.primaryConstructor21 return if (constructor == null || constructor.parameters.isEmpty()) {22 null23 } else {24 val manager = TestContextManager(clazz.java)25 val context = manager.testContext.applicationContext26 context.autowireCapableBeanFactory.autowire(27 clazz.java,28 AutowireCapableBeanFactory.AUTOWIRE_CONSTRUCTOR, true29 ) as Spec30 }31 }32}...

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ConstructorExtensionTest.kt

Source:ConstructorExtensionTest.kt Github

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...24 test("a") {}25 }26}27private class ErroringConstructorExtension : ConstructorExtension {28 override fun <T : Spec> instantiate(clazz: KClass<T>): Spec? {29 error("THWACK!")30 }31}...

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instantiate

Using AI Code Generation

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1 val constructorExtension = ConstructorExtension()2 val instance = constructorExtension.instantiate(testCase)3 val invokeExtension = InvokeExtension()4 val result = invokeExtension.invoke(testCase, instance)5 val finalizeExtension = FinalizeExtension()6 val finalResult = finalizeExtension.finalize(testCase, result)7 finalResult shouldBe TestResult.success(1)8}

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