How to use specs class of io.kotest.framework.multiplatform.native package

Best Kotest code snippet using io.kotest.framework.multiplatform.native.specs

SpecIrGenerationExtension.kt

Source:SpecIrGenerationExtension.kt

...31import java.util.concurrent.CopyOnWriteArrayList32class SpecIrGenerationExtension(private val messageCollector: MessageCollector) : IrGenerationExtension {33   override fun generate(moduleFragment: IrModuleFragment, pluginContext: IrPluginContext) {34      moduleFragment.transform(object : IrElementTransformerVoidWithContext() {35         val specs = CopyOnWriteArrayList<IrClass>()36         override fun visitModuleFragment(declaration: IrModuleFragment): IrModuleFragment {37            val fragment = super.visitModuleFragment(declaration)38            messageCollector.toLogger().log("Detected ${specs.size} native specs:")39            specs.forEach {40               messageCollector.toLogger().log(it.kotlinFqName.asString())41            }42            if (specs.isEmpty()) return fragment43            val file = declaration.files.first()44            val launcherClass = pluginContext.referenceClass(FqName(EntryPoint.TestEngineClassName))45               ?: error("Cannot find ${EntryPoint.TestEngineClassName} class reference")46            val launcherConstructor = launcherClass.constructors.first { it.owner.valueParameters.isEmpty() }47            val launchFn = launcherClass.getSimpleFunction(EntryPoint.LaunchMethodName)48               ?: error("Cannot find function ${EntryPoint.LaunchMethodName}")49            val withSpecsFn = launcherClass.getSimpleFunction(EntryPoint.WithSpecsMethodName)50               ?: error("Cannot find function ${EntryPoint.WithSpecsMethodName}")51            val withTeamCityListenerMethodNameFn =52               launcherClass.getSimpleFunction(EntryPoint.WithTeamCityListenerMethodName)53                  ?: error("Cannot find function ${EntryPoint.WithTeamCityListenerMethodName}")54            val eagerAnnotationName = FqName("kotlin.native.EagerInitialization")55            val eagerAnnotation = pluginContext.referenceClass(eagerAnnotationName)56               ?: error("Cannot find eager initialisation annotation class $eagerAnnotationName")57            val eagerAnnotationConstructor = eagerAnnotation.constructors.single()58            val launcher = pluginContext.irFactory.buildProperty {59               name = Name.identifier(EntryPoint.LauncherValName)60            }.apply {61               parent = file62               annotations += IrSingleStatementBuilder(pluginContext, Scope(this.symbol), UNDEFINED_OFFSET, UNDEFINED_OFFSET).build { irCall(eagerAnnotationConstructor) }63               backingField = pluginContext.irFactory.buildField {64                  type = pluginContext.irBuiltIns.unitType65                  isFinal = true66                  isExternal = false67                  isStatic = true // top level vals must be static68                  name = Name.identifier(EntryPoint.LauncherValName)69               }.also { field ->70                  field.correspondingPropertySymbol = this@apply.symbol71                  field.initializer = pluginContext.irFactory.createExpressionBody(startOffset, endOffset) {72                     this.expression = DeclarationIrBuilder(pluginContext, field.symbol).irBlock {73                        +irCall(launchFn).also { launch ->74                           launch.dispatchReceiver = irCall(withTeamCityListenerMethodNameFn).also { withTeamCity ->75                              withTeamCity.dispatchReceiver = irCall(withSpecsFn).also { withSpecs ->76                                 withSpecs.dispatchReceiver = irCall(launcherConstructor)77                                 withSpecs.putValueArgument(78                                    0,79                                    irVararg(80                                       pluginContext.irBuiltIns.stringType,81                                       specs.map { irCall(it.constructors.first()) }82                                    )83                                 )84                              }85                           }86                        }87                     }88                  }89               }90               addGetter {91                  returnType = pluginContext.irBuiltIns.unitType92               }.also { func ->93                  func.body = DeclarationIrBuilder(pluginContext, func.symbol).irBlockBody {94                  }95               }96            }97            file.addChild(launcher)98            return fragment99         }100         override fun visitFileNew(declaration: IrFile): IrFile {101            super.visitFileNew(declaration)102            val specs = declaration.specs()103            messageCollector.toLogger().log("${declaration.name} contains ${specs.size} spec(s): ${specs.joinToString(", ") { it.kotlinFqName.asString() }}")104            this.specs.addAll(specs)105            return declaration106         }107      }, null)108   }109}...

specs.kt

Source:specs.kt

...15   "io.kotest.core.spec.style.StringSpec",16   "io.kotest.core.spec.style.WordSpec",17)18/**19 * Returns any specs declared at the top level in this file.20 */21fun IrFile.specs() = declarations.filterIsInstance<IrClass>().filter { it.isSpecClass() }22/**23 * Recursively returns all supertypes for an [IrClass] to the top of the type tree.24 */25fun IrClass.superTypes(): List<IrType> =26   this.superTypes + this.superTypes.flatMap { it.getClass()?.superTypes() ?: emptyList() }27/**28 * Returns true if any of the parents of this class are a spec class.29 */30fun IrClass.isSpecClass() =31   superTypes().mapNotNull { it.classFqName?.asString() }.intersect(specClasses).isNotEmpty()...

entry.kt

Source:entry.kt

...5   // the method invoked to start the tests, must exist on TestEngineLauncher6   const val LaunchMethodName = "launch"7   // the FQN for the class used to launch the MPP engine8   const val TestEngineClassName = "io.kotest.engine.TestEngineLauncher"9   // the method invoked to add specs to the launcher, must exist on TestEngineLauncher10   const val WithSpecsMethodName = "withSpecs"11   // the method invoked to set the team city listener, must exist on TestEngineLauncher12   const val WithTeamCityListenerMethodName = "withTeamCityListener"13}...

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.