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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}...

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