Best Kotest code snippet using io.kotest.core.extensions.DiscoveryExtension.afterScan
Discovery.kt
Source: Discovery.kt
...28}29/**30 * Scans for tests as specified by a [DiscoveryRequest].31 *32 * [DiscoveryExtension] `afterScan` functions are applied after the scan is complete to33 * optionally filter the returned classes.34 */35class Discovery(private val discoveryExtensions: List<DiscoveryExtension> = emptyList()) {36 private val requests = ConcurrentHashMap<DiscoveryRequest, DiscoveryResult>()37 // the results of a classpath scan, lazily executed and memoized.38 private val scanResult = lazy { classgraph().scan() }39 // filter functions40 //private val isScript: (KClass<*>) -> Boolean = { ScriptTemplateWithArgs::class.java.isAssignableFrom(it.java) }41 private val isSpecSubclassKt: (KClass<*>) -> Boolean = { Spec::class.java.isAssignableFrom(it.java) }42 private val isSpecSubclass: (Class<*>) -> Boolean = { Spec::class.java.isAssignableFrom(it) }43 private val isAbstract: (KClass<*>) -> Boolean = { it.isAbstract }44 private val fromClassPaths: List<KClass<out Spec>> by lazy { scanUris() }45 /**46 * Returns a function that applies all the [DiscoveryFilter]s to a given class.47 * The class must pass all the filters to be included.48 */49 private fun filterFn(filters: List<DiscoveryFilter>): (KClass<out Spec>) -> Boolean = { kclass ->50 filters.isEmpty() || filters.all { it.test(kclass) }51 }52 /**53 * Returns a function that applies all the [DiscoverySelector]s to a given class.54 * The class must pass any one selector to be included.55 */56 private fun selectorFn(selectors: List<DiscoverySelector>): (KClass<out Spec>) -> Boolean = { kclass ->57 selectors.isEmpty() || selectors.any { it.test(kclass) }58 }59 fun discover(request: DiscoveryRequest): DiscoveryResult =60 requests.getOrPut(request) { doDiscovery(request).getOrElse { DiscoveryResult.error(it) } }61// /**62// * Scans the classpaths for kotlin script files.63// */64// private fun discoverScripts(): List<KClass<out ScriptTemplateWithArgs>> {65// log { "Discovery: Running script scan" }66// return scanResult.value67// .allClasses68// .filter { it.extendsSuperclass(ScriptTemplateWithArgs::class.java.name) }69// .map { it.load(false) }70// .filter(isScript)71// .filterIsInstance<KClass<out ScriptTemplateWithArgs>>()72// }73 /**74 * Loads a class reference from a [ClassInfo].75 *76 * @param init false to avoid initializing the class77 */78 private fun ClassInfo.load(init: Boolean): KClass<out Any> =79 Class.forName(name, init, this::class.java.classLoader).kotlin80 private fun doDiscovery(request: DiscoveryRequest): Result<DiscoveryResult> = runCatching {81 val specClasses =82 if (request.onlySelectsSingleClasses()) loadSelectedSpecs(request) else fromClassPaths83 val filtered = specClasses84 .asSequence()85 .filter(selectorFn(request.selectors))86 .filter(filterFn(request.filters))87 // all classes must subclass one of the spec parents88 .filter(isSpecSubclassKt)89 // we don't want abstract classes90 .filterNot(isAbstract)91 .toList()92 log { "After filters there are ${filtered.size} spec classes" }93 log { "[Discovery] Further filtering classes via discovery extensions [$discoveryExtensions]" }94 val afterExtensions = discoveryExtensions95 .fold(filtered) { cl, ext -> ext.afterScan(cl) }96 .sortedBy { it.simpleName }97 log { "After discovery extensions there are ${afterExtensions.size} spec classes" }98 val scriptsEnabled = System.getProperty(KotestEngineProperties.scriptsEnabled) == "true" ||99 System.getenv(KotestEngineProperties.scriptsEnabled) == "true"100// val scripts = when {101// scriptsEnabled -> discoverScripts()102// else -> emptyList()103// }104 if (scanResult.isInitialized()) runCatching { scanResult.value.close() }105 log { "Discovery result [${afterExtensions.size} specs; scripts]" }106 DiscoveryResult(afterExtensions, emptyList(), null)107 }108 /**109 * Returns whether this is a request that selects single classes...
DiscoveryExtension.kt
Source: DiscoveryExtension.kt
...30 * @param classes the [KClass] for each discovered [Spec]31 *32 * @return the list of filtered classes to use.33 */34 fun afterScan(classes: List<KClass<out Spec>>): List<KClass<out Spec>>35}...
DiscoveryExtensionExceptionTest.kt
...19 }20}21private class EmptySpec : FunSpec()22private val ext = object : DiscoveryExtension {23 override fun afterScan(classes: List<KClass<out Spec>>): List<KClass<out Spec>> {24 error("discovery goes boom")25 }26}27private object Dummy : FunSpec() {28 init {29 test("a") {}30 }31}
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