How to use Result.mapError method of io.kotest.common.results class

Best Kotest code snippet using io.kotest.common.results.Result.mapError

SpecExtensions.kt

Source:SpecExtensions.kt

1package io.kotest.engine.spec2import io.kotest.common.mapError3import io.kotest.core.config.ExtensionRegistry4import io.kotest.core.extensions.Extension5import io.kotest.core.extensions.SpecExtension6import io.kotest.core.listeners.AfterSpecListener7import io.kotest.core.listeners.BeforeSpecListener8import io.kotest.core.listeners.FinalizeSpecListener9import io.kotest.core.listeners.IgnoredSpecListener10import io.kotest.core.listeners.InstantiationErrorListener11import io.kotest.core.listeners.InstantiationListener12import io.kotest.core.listeners.PrepareSpecListener13import io.kotest.core.listeners.SpecInstantiationListener14import io.kotest.core.spec.Spec15import io.kotest.core.spec.functionOverrideCallbacks16import io.kotest.core.test.TestCase17import io.kotest.core.test.TestResult18import io.kotest.engine.extensions.ExtensionException19import io.kotest.engine.extensions.MultipleExceptions20import io.kotest.mpp.Logger21import io.kotest.mpp.bestName22import kotlin.reflect.KClass23/**24 * Used to invoke extension points / listeners / callbacks on specs.25 */26internal class SpecExtensions(private val registry: ExtensionRegistry) {27   private val logger = Logger(SpecExtensions::class)28   /**29    * Returns all [Extension]s applicable to a [Spec]. This includes extensions via30    * function overrides, those registered explicitly in the spec as part of the DSL,31    * and project wide extensions from configuration.32    */33   fun extensions(spec: Spec): List<Extension> {34      return spec.extensions() + // overriding the extensions function in the spec35         spec.listeners() + // overriding the listeners function in the spec36         spec.functionOverrideCallbacks() + // dsl37         spec.registeredExtensions() + // added to the spec via register38         registry.all() // globals39   }40   suspend fun beforeSpec(spec: Spec): Result<Spec> {41      logger.log { Pair(spec::class.bestName(), "beforeSpec $spec") }42      val errors = extensions(spec).filterIsInstance<BeforeSpecListener>().mapNotNull { ext ->43         runCatching { ext.beforeSpec(spec) }44            .mapError { ExtensionException.BeforeSpecException(it) }.exceptionOrNull()45      }46      return when {47         errors.isEmpty() -> Result.success(spec)48         errors.size == 1 -> Result.failure(errors.first())49         else -> Result.failure(MultipleExceptions(errors))50      }51   }52   /**53    * Runs all the after spec listeners for this [Spec]. All errors are caught and wrapped54    * in [AfterSpecListener] and if more than one error, all will be returned as a [MultipleExceptions].55    */56   suspend fun afterSpec(spec: Spec): Result<Spec> = runCatching {57      logger.log { Pair(spec::class.bestName(), "afterSpec $spec") }58      spec.registeredAutoCloseables().let { closeables ->59         logger.log { Pair(spec::class.bestName(), "Closing ${closeables.size} autocloseables [$closeables]") }60         closeables.forEach {61            if(it.isInitialized()) it.value.close() else Unit62         }63      }64      val errors = extensions(spec).filterIsInstance<AfterSpecListener>().mapNotNull { ext ->65         runCatching { ext.afterSpec(spec) }66            .mapError { ExtensionException.AfterSpecException(it) }.exceptionOrNull()67      }68      return when {69         errors.isEmpty() -> Result.success(spec)70         errors.size == 1 -> Result.failure(errors.first())71         else -> Result.failure(MultipleExceptions(errors))72      }73   }74   suspend fun specInstantiated(spec: Spec) = runCatching {75      logger.log { Pair(spec::class.bestName(), "specInstantiated $spec") }76      registry.all().filterIsInstance<SpecInstantiationListener>().forEach { it.specInstantiated(spec) }77      registry.all().filterIsInstance<InstantiationListener>().forEach { it.specInstantiated(spec) }78   }79   suspend fun specInstantiationError(kclass: KClass<out Spec>, t: Throwable) = runCatching {80      logger.log { Pair(kclass.bestName(), "specInstantiationError $t") }81      registry.all().filterIsInstance<SpecInstantiationListener>().forEach { it.specInstantiationError(kclass, t) }82      registry.all().filterIsInstance<InstantiationErrorListener>().forEach { it.instantiationError(kclass, t) }83   }84   suspend fun prepareSpec(kclass: KClass<out Spec>): Result<KClass<*>> {85      val exts = registry.all().filterIsInstance<PrepareSpecListener>()86      logger.log { Pair(kclass.bestName(), "prepareSpec (${exts.size})") }87      val errors = exts.mapNotNull {88         runCatching { it.prepareSpec(kclass) }89            .mapError { ExtensionException.PrepareSpecException(it) }.exceptionOrNull()90      }91      return when {92         errors.isEmpty() -> Result.success(kclass)93         errors.size == 1 -> Result.failure(errors.first())94         else -> Result.failure(MultipleExceptions(errors))95      }96   }97   suspend fun finalizeSpec(98      kclass: KClass<out Spec>,99      results: Map<TestCase, TestResult>,100      t: Throwable?101   ): Result<KClass<out Spec>> {102      val exts = registry.all().filterIsInstance<FinalizeSpecListener>()103      logger.log { Pair(kclass.bestName(), "finishSpec (${exts.size}) results:$results") }104      val errors = exts.mapNotNull {105         runCatching { it.finalizeSpec(kclass, results) }106            .mapError { ExtensionException.FinalizeSpecException(it) }.exceptionOrNull()107      }108      return when {109         errors.isEmpty() -> Result.success(kclass)110         errors.size == 1 -> Result.failure(errors.first())111         else -> Result.failure(MultipleExceptions(errors))112      }113   }114   suspend fun <T> intercept(spec: Spec, f: suspend () -> T): T? {115      val exts = extensions(spec).filterIsInstance<SpecExtension>()116      logger.log { Pair(spec::class.bestName(), "Intercepting spec with ${exts.size} spec extensions") }117      var result: T? = null118      val initial: suspend () -> Unit = {119         result = f()120      }121      val chain = exts.foldRight(initial) { op, acc ->122         {123            op.intercept(spec::class) {124               op.intercept(spec) {125                  acc()126               }127            }128         }129      }130      chain.invoke()131      return result132   }133   /**134    * Notify all [IgnoredSpecListener]s that the given [kclass] has been ignored.135    */136   suspend fun ignored(kclass: KClass<out Spec>, reason: String?): Result<KClass<out Spec>> {137      val exts = registry.all().filterIsInstance<IgnoredSpecListener>()138      logger.log { Pair(kclass.bestName(), "ignored ${exts.size} extensions on $kclass") }139      val errors = exts.mapNotNull {140         runCatching { it.ignoredSpec(kclass, reason) }141            .mapError { ExtensionException.IgnoredSpecException(it) }.exceptionOrNull()142      }143      return when {144         errors.isEmpty() -> Result.success(kclass)145         errors.size == 1 -> Result.failure(errors.first())146         else -> Result.failure(MultipleExceptions(errors))147      }148   }149}...

Result.mapError

Using AI Code Generation

1fun <E, A> Result<E, A>.mapError(f: (E) -> E): Result<E, A> = when (this) {2is Failure -> Failure(f(e))3}4fun <E, A> Result<E, A>.mapError(f: (E) -> E): Result<E, A> = when (this) {5is Failure -> Failure(f(e))6}7fun <E, A> Result<E, A>.mapError(f: (E) -> E): Result<E, A> = when (this) {8is Failure -> Failure(f(e))9}10fun <E, A> Result<E, A>.mapError(f: (E) -> E): Result<E, A> = when (this) {11is Failure -> Failure(f(e))12}13fun <E, A> Result<E, A>.mapError(f: (E) -> E): Result<E, A> = when (this) {14is Failure -> Failure(f(e))15}16fun <E, A> Result<E, A>.mapError(f: (E) -> E): Result<E, A> = when (this) {17is Failure -> Failure(f(e))18}19fun <E, A> Result<E, A>.mapError(f: (E) -> E): Result<E, A> = when (this) {20is Failure -> Failure(f(e))21}22fun <E, A> Result<E, A>.mapError(f: (E) -> E): Result<E, A> = when (this) {23is Failure -> Failure(f(e))24}

Result.mapError

Using AI Code Generation

1val result = Result.failure("error")2val mappedResult = result.mapError { "mapped $it" }3mappedResult shouldBe Result.failure("mapped error")4val result = Result.failure("error")5val mappedResult = result.mapError { "mapped $it" }6mappedResult shouldBe Result.failure("mapped error")7val result = Result.failure("error")8val mappedResult = result.mapError { "mapped $it" }9mappedResult shouldBe Result.failure("mapped error")10val result = Result.failure("error")11val mappedResult = result.mapError { "mapped $it" }12mappedResult shouldBe Result.failure("mapped error")13val result = Result.failure("error")14val mappedResult = result.mapError { "mapped $it" }15mappedResult shouldBe Result.failure("mapped error")16val result = Result.failure("error")17val mappedResult = result.mapError { "mapped $it" }18mappedResult shouldBe Result.failure("mapped error")19val result = Result.failure("error")20val mappedResult = result.mapError { "mapped $it" }21mappedResult shouldBe Result.failure("mapped error")22val result = Result.failure("error")23val mappedResult = result.mapError { "mapped $it" }24mappedResult shouldBe Result.failure("mapped error")25val result = Result.failure("error")26val mappedResult = result.mapError { "mapped $it" }27mappedResult shouldBe Result.failure("mapped error")28val result = Result.failure("error")29val mappedResult = result.mapError { "mapped $it" }30mappedResult shouldBe Result.failure("mapped error")31val result = Result.failure("error")32val mappedResult = result.mapError { "mapped

Result.mapError

Using AI Code Generation

1val result = Result.failure ( "error" )2val mappedResult = result . mapError { it . length }3mappedResult . shouldBe ( Result . Failure ( 5 ))4val result = Result . success ( 5 )5val mappedResult = result . mapError { it . length }6mappedResult . shouldBe ( Result . Success ( 5 ))7val result = Result . failure ( "error" )8val mappedResult = result . mapError { it . length }9mappedResult . shouldBe ( Result . Failure ( 5 ))10val result = Result . success ( 5 )11val mappedResult = result . mapError { it . length }12mappedResult . shouldBe ( Result . Success ( 5 ))13val result = Result . failure ( "error" )14val mappedResult = result . mapError { it . length }15mappedResult . shouldBe ( Result . Failure ( 5 ))16val result = Result . success ( 5 )17val mappedResult = result . mapError { it . length }18mappedResult . shouldBe ( Result . Success ( 5 ))19val result = Result . failure ( "error" )20val mappedResult = result . mapError { it . length }21mappedResult . shouldBe ( Result . Failure ( 5 ))22val result = Result . success ( 5 )23val mappedResult = result . mapError { it . length }24mappedResult . shouldBe ( Result . Success ( 5 ))25val result = Result . failure ( "error" )26val mappedResult = result . mapError { it . length }27mappedResult . shouldBe ( Result . Failure ( 5 ))28val result = Result . success ( 5 )29val mappedResult = result . mapError { it . length }

Result.mapError

Using AI Code Generation

1    Result.success(1).mapError { "failed" } shouldBe Result.success(1)2    Result.failure("failed").mapError { "failed again" } shouldBe Result.failure("failed again")3    Result.success(1).mapError { "failed" } shouldBe Result.success(1)4    Result.failure("failed").mapError { "failed again" } shouldBe Result.failure("failed again")5    Result.success(1).mapError { "failed" } shouldBe Result.success(1)6    Result.failure("failed").mapError { "failed again" } shouldBe Result.failure("failed again")7    Result.success(1).mapError { "failed" } shouldBe Result.success(1)8    Result.failure("failed").mapError { "failed again" } shouldBe Result.failure("failed again")9    Result.success(1).mapError { "failed" } shouldBe Result.success(1)10    Result.failure("failed").mapError { "failed again" } shouldBe Result.failure("failed again")11    Result.success(1).mapError { "failed" } shouldBe Result.success(1)12    Result.failure("failed").mapError { "failed again" } shouldBe Result.failure("failed again")13    Result.success(1).mapError { "failed" } shouldBe Result.success(1)14    Result.failure("failed").mapError { "failed again" } shouldBe Result.failure("failed again")

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.