java.lang.NoSuchMethodError:org.junit.platform.launcher.Launcher.execute [英] java.lang.NoSuchMethodError: org.junit.platform.launcher.Launcher.execute
问题描述
我正在尝试运行以下示例单元测试用例
class ExampleUnitTest {
@Test
fun addition_is_Correct() {
assertEquals(4, (2 + 2).toLong())
}
}
但我收到以下异常
Exception in thread "main" java.lang.NoSuchMethodError: org.junit.platform.launcher.Launcher.execute(Lorg/junit/platform/launcher/LauncherDiscoveryRequest;)V
at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:61)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMainV2.main(AppMainV2.java:131)
即使我已经更新了所有的Junit依赖build.gradle文件,如下所示
testImplementation 'junit:junit:4.12'
testImplementation 'org.jetbrains.spek:spek-api:1.1.5'
testImplementation 'org.jetbrains.spek:spek-junit-platform-engine:1.1.5'
testImplementation 'org.junit.platform:junit-platform-launcher:1.0.0'
testImplementation 'org.junit.platform:junit-platform-runner:1.0.0'
testImplementation 'org.junit.vintage:junit-vintage-engine:4.12.3'
testImplementation 'org.junit.jupiter:junit-jupiter-api:5.0.0'
testImplementation 'org.junit.jupiter:junit-jupiter-params:5.0.0'
testImplementation 'org.junit.jupiter:junit-jupiter-engine:5.0.0'
对此有什么解决办法吗?
TL; DR 根据最初在IDEA_INSTALLATION_HOME/plugins/junit/lib
长版:
假设您使用的是Intellij IDEA的版本早于2017.3;那么您就可以将这些选择作为对另一个SO问题的正式回答: https: //intellij-support.jetbrains.com/hc/en-us/community/posts/115000791190-Intellij-does-not-run-Junit5-tests
将其粘贴到此处以使其更加可见:
IDE对旧的junit 5启动器jar具有编译依赖性,并且与当前发行版不兼容.因此,您可以选择更新IDE,使其与您使用的junit版本兼容或降级junit版本(检查IDEA_INSTALLATION_HOME/plugins/junit/lib中捆绑的版本). 2017.1仅对junit 5提供了实验支持,因为当时junit 5尚未发布.不便之处,敬请谅解.
因此,转到您的IDEA_INSTALLATION_HOME/plugins/junit/lib
文件夹并检查在那里找到的jar
文件的名称中的版本.
应该是这样的:
user@comp:IDEA_INSTALLATION_HOME/plugins/junit/lib]$ ls
idea-junit.jar junit-platform-runner-1.0.0-M4.jar
junit5-rt.jar junit-platform-suite-api-1.0.0-M4.jar
junit-jupiter-api-5.0.0-M4.jar junit-rt.jar
junit-jupiter-engine-5.0.0-M4.jar junit-vintage-engine-4.12.0-M4.jar
junit-platform-commons-1.0.0-M4.jar opentest4j-1.0.0-M2.jar
junit-platform-engine-1.0.0-M4.jar resources_en.jar
junit-platform-launcher-1.0.0-M4.jar
现在在模块的pom.xml
properties
设置中使用junit-
文件名的版本后缀:
<project>
...
<properties>
<junit.jupiter.version>5.0.0-M4</junit.jupiter.version>
<junit.platform.version>1.0.0-M4</junit.platform.version>
<junit.vintage.version>4.12.0-M4</junit.vintage.version>
...
</properties>
...
</project>
我可以确认,更改为旧版本后,我可以运行使用org.junit.jupiter
软件包的Test类.在此之前,在尝试运行测试时,我会不断得到NoSuchMethodError
.
I'm trying to run the following example unit test case
class ExampleUnitTest {
@Test
fun addition_is_Correct() {
assertEquals(4, (2 + 2).toLong())
}
}
but I get the following exception
Exception in thread "main" java.lang.NoSuchMethodError: org.junit.platform.launcher.Launcher.execute(Lorg/junit/platform/launcher/LauncherDiscoveryRequest;)V
at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:61)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMainV2.main(AppMainV2.java:131)
even though I have updated all the Junit dependencies build.gradle file like given below
testImplementation 'junit:junit:4.12'
testImplementation 'org.jetbrains.spek:spek-api:1.1.5'
testImplementation 'org.jetbrains.spek:spek-junit-platform-engine:1.1.5'
testImplementation 'org.junit.platform:junit-platform-launcher:1.0.0'
testImplementation 'org.junit.platform:junit-platform-runner:1.0.0'
testImplementation 'org.junit.vintage:junit-vintage-engine:4.12.3'
testImplementation 'org.junit.jupiter:junit-jupiter-api:5.0.0'
testImplementation 'org.junit.jupiter:junit-jupiter-params:5.0.0'
testImplementation 'org.junit.jupiter:junit-jupiter-engine:5.0.0'
is there any solution for this?
TL;DR downgrade your dependencies in pom.xml
according to versions that originally came with IDEA found in IDEA_INSTALLATION_HOME/plugins/junit/lib
Longer version:
Let's presume you're using a version of the Intellij IDEA older than 2017.3; then you have these choices that were given as an official answer to another SO question: https://intellij-support.jetbrains.com/hc/en-us/community/posts/115000791190-Intellij-does-not-run-Junit5-tests
Pasting it here to to make it more visible:
IDE has compilation dependency on the old junit 5 launcher jar and it is not compatible with current released version. So you have a choice to update IDE so it will be compatible with the junit version you use or to downgrade the junit version (check what version was bundled in IDEA_INSTALLATION_HOME/plugins/junit/lib). 2017.1 had only experimental support for junit 5 as junit 5 was not released yet at that time. Sorry for the inconvenience.
So, go to your IDEA_INSTALLATION_HOME/plugins/junit/lib
folder and check the versions in the names of the jar
files found there.
Should be something like this:
user@comp:IDEA_INSTALLATION_HOME/plugins/junit/lib]$ ls
idea-junit.jar junit-platform-runner-1.0.0-M4.jar
junit5-rt.jar junit-platform-suite-api-1.0.0-M4.jar
junit-jupiter-api-5.0.0-M4.jar junit-rt.jar
junit-jupiter-engine-5.0.0-M4.jar junit-vintage-engine-4.12.0-M4.jar
junit-platform-commons-1.0.0-M4.jar opentest4j-1.0.0-M2.jar
junit-platform-engine-1.0.0-M4.jar resources_en.jar
junit-platform-launcher-1.0.0-M4.jar
Now use the junit-
filename's version suffix in your module's pom.xml
properties
setup:
<project>
...
<properties>
<junit.jupiter.version>5.0.0-M4</junit.jupiter.version>
<junit.platform.version>1.0.0-M4</junit.platform.version>
<junit.vintage.version>4.12.0-M4</junit.vintage.version>
...
</properties>
...
</project>
I can confirm that after changing to older versions, I could run Test classes that were using org.junit.jupiter
package. Before this I was constantly getting the NoSuchMethodError
when trying to run the Tests.
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