org.gradle.api.internal.tasks.testing.TestSuiteExecutionExce

Question

Java 8，

我想在我的java项目中使用JUnit 4。

在my build.gradle

dependencies {
implementation 'org.apache.commons:commons-lang3'
implementation 'org.apache.logging.log4j:log4j-api'
implementation 'org.apache.logging.log4j:log4j-core'
implementation 'org.apache.logging.log4j:log4j-slf4j-impl'
implementation "org.jetbrains.kotlin:kotlin-stdlib"
implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core-jvm:1.5.2'
testImplementation('org.assertj:assertj-core:3.21.0')
testImplementation('org.mockito:mockito-core:4.0.0')
testImplementation('junit:junit:4.13.2')
}

这里是我的单元测试:

import org.junit.BeforeClass;
import org.junit.Test;
import java.util.*;
import static org.assertj.core.api.Assertions.assertThat;
public class VsatVlansNSTest {

@BeforeClass
public static void setupAll() {
//
}
@Test
public void find_NS_2_4_higher_matcher() {
// some test here
}
}

但是我得到错误:

g.gradle.api.internal.tasks.testing.TestSuiteExecutionException: Could not complete execution for Gradle Test Executor 5.
at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.stop(SuiteTestClassProcessor.java:63)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)
at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
at com.sun.proxy.$Proxy2.stop(Unknown Source)
at org.gradle.api.internal.tasks.testing.worker.TestWorker.stop(TestWorker.java:133)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:182)
at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:164)
at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:414)
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56)
at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: org.junit.platform.commons.PreconditionViolationException: Cannot create Launcher without at least one TestEngine; consider adding an engine implementation JAR to the classpath
at org.junit.platform.commons.util.Preconditions.condition(Preconditions.java:296)
at org.junit.platform.launcher.core.DefaultLauncher.<init>(DefaultLauncher.java:48)
at org.junit.platform.launcher.core.LauncherFactory.create(LauncherFactory.java:105)
at org.junit.platform.launcher.core.LauncherFactory.create(LauncherFactory.java:75)
at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.processAllTestClasses(JUnitPlatformTestClassProcessor.java:97)
at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.access$000(JUnitPlatformTestClassProcessor.java:79)
at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor.stop(JUnitPlatformTestClassProcessor.java:75)
at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.stop(SuiteTestClassProcessor.java:61)
... 25 more

Answer 1

很可能，您还没有添加名为junit engine的依赖项，请添加这些依赖项:

dependencies {
testImplementation 'org.junit.jupiter:junit-jupiter-api:5.7.1'
testImplementation 'org.junit.jupiter:junit-jupiter-engine:5.7.1'
}

Answer 2

如果你想继续使用JUnit 4(就像在问题中提到的)，检查你的Gradle构建文件中的任何useJUnitPlatform()并删除它。

相反，你的测试块应该像这样:

test {
useJUnit()  // JUnit 4

// ... other config ...
}

这样，你仍然可以通过Gradle在遗留项目中使用JUnit 4，而不需要升级到JUnit 5。