java.lang.NoClassDefFoundError: kotlin/time/MonoClock

kotlin: 1.3.70-eap-184 kotest version: 4.0.0-BETA1

build.gradle.kts:

dependencies {
	testImplementation("ch.qos.logback:logback-classic")

	testImplementation("io.kotest:kotest-runner-junit5-jvm")
	testImplementation("io.kotest:kotest-extensions-spring-jvm")
	testImplementation("io.kotest:kotest-assertions-json-jvm")

	testImplementation("org.springframework.boot:spring-boot-starter-test") {
		exclude(group = "org.junit.vintage")
	}
}

sample code:

package demo

import io.kotest.core.spec.style.FunSpec
import io.kotest.matchers.shouldNotBe
import io.kotest.spring.SpringListener

class DemoTest : FunSpec(
	{
		listener(SpringListener)

		beforeSpec {
			println("before_spec.SPRING_PROFILES_ACTIVE: ${System.getenv("SPRING_PROFILES_ACTIVE")}")
		}

		beforeTest {
			println("Starting test ${it.name}!")
		}

		afterTest {
			println("Finished test ${it.a.name}!")
		}

		test("test env") {
			println("execute test: ${testCase.name}")
			System.getenv("SPRING_PROFILES_ACTIVE").shouldNotBe("test")
		}
	}
)

report output:

13:50:38.664 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating CacheAwareContextLoaderDelegate from class [org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate]
13:50:38.688 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating BootstrapContext using constructor [public org.springframework.test.context.support.DefaultBootstrapContext(java.lang.Class,org.springframework.test.context.CacheAwareContextLoaderDelegate)]
13:50:38.740 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating TestContextBootstrapper for test class [com.apisafepay.external.providers.octocash.rest.interceptors.DemoTest] from class [org.springframework.test.context.support.DefaultTestContextBootstrapper]
13:50:38.764 [kotest-engine-0 @coroutine#1] INFO org.springframework.test.context.support.DefaultTestContextBootstrapper - Neither @ContextConfiguration nor @ContextHierarchy found for test class [com.apisafepay.external.providers.octocash.rest.interceptors.DemoTest], using DelegatingSmartContextLoader
13:50:38.770 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.test.context.support.AbstractDelegatingSmartContextLoader - Delegating to GenericXmlContextLoader to process context configuration [ContextConfigurationAttributes@1110e6f8 declaringClass = 'com.apisafepay.external.providers.octocash.rest.interceptors.DemoTest', classes = '{}', locations = '{}', inheritLocations = false, initializers = '{}', inheritInitializers = true, name = [null], contextLoaderClass = 'org.springframework.test.context.ContextLoader'].
13:50:38.776 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.test.context.support.AbstractContextLoader - Did not detect default resource location for test class [com.apisafepay.external.providers.octocash.rest.interceptors.DemoTest]: class path resource [com/apisafepay/external/providers/octocash/rest/interceptors/DemoTest-context.xml] does not exist
13:50:38.777 [kotest-engine-0 @coroutine#1] INFO org.springframework.test.context.support.AbstractContextLoader - Could not detect default resource locations for test class [com.apisafepay.external.providers.octocash.rest.interceptors.DemoTest]: no resource found for suffixes {-context.xml}.
13:50:38.778 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.test.context.support.AbstractDelegatingSmartContextLoader - Delegating to AnnotationConfigContextLoader to process context configuration [ContextConfigurationAttributes@1110e6f8 declaringClass = 'com.apisafepay.external.providers.octocash.rest.interceptors.DemoTest', classes = '{}', locations = '{}', inheritLocations = false, initializers = '{}', inheritInitializers = true, name = [null], contextLoaderClass = 'org.springframework.test.context.ContextLoader'].
13:50:38.779 [kotest-engine-0 @coroutine#1] INFO org.springframework.test.context.support.AnnotationConfigContextLoaderUtils - Could not detect default configuration classes for test class [com.apisafepay.external.providers.octocash.rest.interceptors.DemoTest]: DemoTest does not declare any static, non-private, non-final, nested classes annotated with @Configuration.
13:50:38.862 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.test.context.support.ActiveProfilesUtils - Could not find an 'annotation declaring class' for annotation type [org.springframework.test.context.ActiveProfiles] and class [com.apisafepay.external.providers.octocash.rest.interceptors.DemoTest]
13:50:38.864 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.test.context.support.DefaultTestContextBootstrapper - @TestExecutionListeners is not present for class [com.apisafepay.external.providers.octocash.rest.interceptors.DemoTest]: using defaults.
13:50:38.865 [kotest-engine-0 @coroutine#1] INFO org.springframework.test.context.support.DefaultTestContextBootstrapper - Loaded default TestExecutionListener class names from location [META-INF/spring.factories]: [org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener, org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener, org.springframework.test.context.web.ServletTestExecutionListener, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener, org.springframework.test.context.support.DependencyInjectionTestExecutionListener, org.springframework.test.context.support.DirtiesContextTestExecutionListener, org.springframework.test.context.transaction.TransactionalTestExecutionListener, org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener, org.springframework.test.context.event.EventPublishingTestExecutionListener]
13:50:38.876 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.test.context.support.DefaultTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.web.ServletTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [javax/servlet/ServletContext]
13:50:38.878 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.test.context.support.DefaultTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.transaction.TransactionalTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [org/springframework/transaction/interceptor/TransactionAttributeSource]
13:50:38.879 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.test.context.support.DefaultTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [org/springframework/transaction/interceptor/TransactionAttribute]
13:50:38.880 [kotest-engine-0 @coroutine#1] INFO org.springframework.test.context.support.DefaultTestContextBootstrapper - Using TestExecutionListeners: [org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener@7601f00e, org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener@6d94b9af, org.springframework.test.context.support.DependencyInjectionTestExecutionListener@3fd16e66, org.springframework.test.context.support.DirtiesContextTestExecutionListener@73b758a7, org.springframework.test.context.event.EventPublishingTestExecutionListener@acf475f, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener@425ede68, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener@76483a1b, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener@3f732615, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener@4ff66b1b, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener@7b6f5113]
13:50:38.883 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.test.context.support.AbstractDirtiesContextTestExecutionListener - Before test class: context [DefaultTestContext@3479c0d3 testClass = DemoTest, testInstance = [null], testMethod = [null], testException = [null], mergedContextConfiguration = [MergedContextConfiguration@4d3c9626 testClass = DemoTest, locations = '{}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@6f4cd60e, org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@315f4a14, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@466ed660, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]], attributes = map[[empty]]], class annotated with @DirtiesContext [false] with mode [null].
13:50:38.891 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.test.context.support.DependencyInjectionTestExecutionListener - Performing dependency injection for test context [[DefaultTestContext@3479c0d3 testClass = DemoTest, testInstance = com.apisafepay.external.providers.octocash.rest.interceptors.DemoTest@4ccc65fc, testMethod = [null], testException = [null], mergedContextConfiguration = [MergedContextConfiguration@4d3c9626 testClass = DemoTest, locations = '{}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@6f4cd60e, org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@315f4a14, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@466ed660, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]], attributes = map[[empty]]]].
13:50:38.892 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.test.context.support.AbstractDelegatingSmartContextLoader - Delegating to AnnotationConfigContextLoader to load context from [MergedContextConfiguration@4d3c9626 testClass = DemoTest, locations = '{}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@6f4cd60e, org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@315f4a14, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@466ed660, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]].
13:50:38.893 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.test.context.support.AbstractGenericContextLoader - Loading ApplicationContext for merged context configuration [[MergedContextConfiguration@4d3c9626 testClass = DemoTest, locations = '{}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@6f4cd60e, org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@315f4a14, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@466ed660, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]]].
13:50:38.952 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.core.env.StandardEnvironment - Activating profiles []
13:50:38.953 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.test.context.support.AnnotationConfigContextLoader - Registering component classes: {}
13:50:38.986 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.context.support.GenericApplicationContext - Refreshing org.springframework.context.support.GenericApplicationContext@24720a3e
13:50:39.007 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor'
13:50:39.038 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.boot.test.mock.mockito.MockitoPostProcessor'
13:50:39.064 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.event.internalEventListenerProcessor'
13:50:39.067 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.event.internalEventListenerFactory'
13:50:39.069 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor'
13:50:39.072 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.annotation.internalCommonAnnotationProcessor'
13:50:39.079 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.boot.test.mock.mockito.MockitoPostProcessor$SpyPostProcessor'
13:50:39.114 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate - Storing ApplicationContext [611453502] in cache under key [[MergedContextConfiguration@4d3c9626 testClass = DemoTest, locations = '{}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@6f4cd60e, org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@315f4a14, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@466ed660, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]]]
13:50:39.115 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.test.context.cache - Spring test ApplicationContext cache statistics: [DefaultContextCache@20b1fe66 size = 1, maxSize = 32, parentContextCount = 0, hitCount = 0, missCount = 1]
13:50:39.544 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate - Retrieved ApplicationContext [611453502] from cache with key [[MergedContextConfiguration@4d3c9626 testClass = DemoTest, locations = '{}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@6f4cd60e, org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@315f4a14, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@466ed660, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]]]
13:50:39.545 [kotest-engine-0 @coroutine#1] DEBUG org.springframework.test.context.cache - Spring test ApplicationContext cache statistics: [DefaultContextCache@20b1fe66 size = 1, maxSize = 32, parentContextCount = 0, hitCount = 1, missCount = 1]
before_spec.SPRING_PROFILES_ACTIVE: test
java.lang.NoClassDefFoundError: kotlin/time/MonoClock
java.lang.NoClassDefFoundError: kotlin/time/MonoClock

[ilya-g]

Since it’s based on inline classes – not earlier than inline classes feature graduates to stable, and that doesn’t seem to happen soon.

[ilya-g]

The fact that the experimental stdlib API is used in kotest may impose serious compatibility problems with the next versions of stdlib. Please refer to the warning in @ExperimentalTime annotation docs: https://github.com/JetBrains/kotlin/blob/v1.3.60/libraries/stdlib/src/kotlin/time/ExperimentalTime.kt#L13-L15