问题
I'm learning Cucumber and I'm getting the FeatureParser error
java.lang.NoClassDefFoundError: io/cucumber/core/gherkin/FeatureParser
I have imported below jar files
- gherkin-9.2.0.jar
- cucumber-core-5.2.0.jar
- cucumber-java-5.2.0.jar
- cucumber-junit-5.2.0.jar
- cucumber-jvm-deps-1.0.6.jar
- cucumber-plugin-5.2.0.jar
i have written code like below
LoginTestRunner.java
package cucumberTests;
import org.junit.runner.RunWith;
import io.cucumber.junit.Cucumber;
import io.cucumber.junit.CucumberOptions;
@RunWith(Cucumber.class)
@CucumberOptions(features="features", glue="stepImplementations")
public class LoginTestRunner {
}
I have written feature file as well.
Getting below error:
java.lang.NoClassDefFoundError: io/cucumber/core/gherkin/FeatureParser
at io.cucumber.core.feature.FeatureParser.parseResource(FeatureParser.java:35)
at io.cucumber.core.runtime.FeaturePathFeatureSupplier.lambda$new$0(FeaturePathFeatureSupplier.java:39)
at java.base/java.util.function.BiFunction.lambda$andThen$0(BiFunction.java:70)
at io.cucumber.core.resource.ResourceScanner.lambda$processResource$2(ResourceScanner.java:126)
at io.cucumber.core.resource.PathScanner$ResourceFileVisitor.visitFile(PathScanner.java:67)
at io.cucumber.core.resource.PathScanner$ResourceFileVisitor.visitFile(PathScanner.java:52)
at java.base/java.nio.file.Files.walkFileTree(Files.java:2724)
at java.base/java.nio.file.Files.walkFileTree(Files.java:2796)
at io.cucumber.core.resource.PathScanner.findResourcesForPath(PathScanner.java:46)
at io.cucumber.core.resource.PathScanner.findResourcesForUri(PathScanner.java:26)
at io.cucumber.core.resource.ResourceScanner.findResourcesForUri(ResourceScanner.java:109)
at io.cucumber.core.resource.ResourceScanner.scanForResourcesUri(ResourceScanner.java:86)
at io.cucumber.core.runtime.FeaturePathFeatureSupplier.loadFeatures(FeaturePathFeatureSupplier.java:62)
at io.cucumber.core.runtime.FeaturePathFeatureSupplier.get(FeaturePathFeatureSupplier.java:46)
at io.cucumber.junit.Cucumber.<init>(Cucumber.java:156)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:104)
at org.junit.vintage.engine.discovery.DefensiveAllDefaultPossibilitiesBuilder$DefensiveAnnotatedBuilder.buildRunner(DefensiveAllDefaultPossibilitiesBuilder.java:113)
at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:86)
at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)
at org.junit.vintage.engine.discovery.DefensiveAllDefaultPossibilitiesBuilder.runnerForClass(DefensiveAllDefaultPossibilitiesBuilder.java:56)
at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
at org.junit.vintage.engine.discovery.ClassSelectorResolver.resolveTestClass(ClassSelectorResolver.java:66)
at org.junit.vintage.engine.discovery.ClassSelectorResolver.resolve(ClassSelectorResolver.java:47)
at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolution.lambda$resolve$2(EngineDiscoveryRequestResolution.java:129)
at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
at java.base/java.util.ArrayList$ArrayListSpliterator.tryAdvance(ArrayList.java:1631)
at java.base/java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:127)
at java.base/java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:502)
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:488)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
at java.base/java.util.stream.FindOps$FindOp.evaluateSequential(FindOps.java:150)
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.base/java.util.stream.ReferencePipeline.findFirst(ReferencePipeline.java:543)
at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolution.resolve(EngineDiscoveryRequestResolution.java:174)
at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolution.resolve(EngineDiscoveryRequestResolution.java:120)
at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolution.resolveCompletely(EngineDiscoveryRequestResolution.java:87)
at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolution.run(EngineDiscoveryRequestResolution.java:80)
at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolver.resolve(EngineDiscoveryRequestResolver.java:112)
at org.junit.vintage.engine.discovery.VintageDiscoverer.discover(VintageDiscoverer.java:42)
at org.junit.vintage.engine.VintageTestEngine.discover(VintageTestEngine.java:62)
at org.junit.platform.launcher.core.DefaultLauncher.discoverEngineRoot(DefaultLauncher.java:177)
at org.junit.platform.launcher.core.DefaultLauncher.discoverRoot(DefaultLauncher.java:164)
at org.junit.platform.launcher.core.DefaultLauncher.discover(DefaultLauncher.java:120)
at org.eclipse.jdt.internal.junit5.runner.JUnit5TestReference.<init>(JUnit5TestReference.java:45)
at org.eclipse.jdt.internal.junit5.runner.JUnit5TestLoader.createUnfilteredTest(JUnit5TestLoader.java:76)
at org.eclipse.jdt.internal.junit5.runner.JUnit5TestLoader.createTest(JUnit5TestLoader.java:66)
at org.eclipse.jdt.internal.junit5.runner.JUnit5TestLoader.loadTests(JUnit5TestLoader.java:53)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:526)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:770)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:464)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:210)
Caused by: java.lang.ClassNotFoundException: io.cucumber.core.gherkin.FeatureParser
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:583)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
... 56 more
回答1:
I'm learning Cucumber and I'm getting the FeatureParser error
If you follow the 10 minute tutorial you'll get an introduction that uses Maven dependency management.
In addition to this tutorial I would strongly urge you to invest time in learning either Maven or Gradle along with Cucumber. Amongst other things these tools will automate your dependency management and this can make your life much easier.
For example:
If you want to use Cucumber with JUnit 4 and annotation based step definitions you would declare this minimal set of dependencies in a Maven pom.xml file.
<properties>
<cucumber.version>5.2.0</cucumber.version>
</properties>
<dependencies>
<dependency>
<groupId>io.cucumber</groupId>
<artifactId>cucumber-java</artifactId>
<version>${cucumber.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.cucumber</groupId>
<artifactId>cucumber-junit</artifactId>
<version>${cucumber.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
By telling Maven what your dependencies are Maven can calculate your transitive dependencies i.e: the dependencies of your dependencies.
This has many advantages. One example would be using the mvn dependency:tree command to will list all dependencies. This is much faster and much less error prone then downloading jar files by hand and hoping that you have the right ones.
$ mvn dependency:tree
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------< cucumber:cucumber-java-skeleton >-------------------
[INFO] Building Cucumber-Java Skeleton 0.0.1
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ cucumber-java-skeleton ---
[INFO] cucumber:cucumber-java-skeleton:jar:0.0.1
[INFO] +- io.cucumber:cucumber-java:jar:5.2.0:test
[INFO] | +- io.cucumber:cucumber-core:jar:5.2.0:test
[INFO] | | +- io.cucumber:cucumber-gherkin:jar:5.2.0:test
[INFO] | | +- io.cucumber:cucumber-gherkin-vintage:jar:5.2.0:test
[INFO] | | +- io.cucumber:tag-expressions:jar:2.0.4:test
[INFO] | | +- io.cucumber:cucumber-expressions:jar:8.3.1:test
[INFO] | | +- io.cucumber:datatable:jar:3.3.0:test
[INFO] | | +- io.cucumber:cucumber-plugin:jar:5.2.0:test
[INFO] | | \- io.cucumber:docstring:jar:5.2.0:test
[INFO] | \- org.apiguardian:apiguardian-api:jar:1.1.0:test
[INFO] +- io.cucumber:cucumber-junit:jar:5.2.0:test
[INFO] \- junit:junit:jar:4.13:test
[INFO] \- org.hamcrest:hamcrest-core:jar:1.3:test
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.781 s
[INFO] Finished at: 2020-02-10T23:00:14+01:00
[INFO] ------------------------------------------------------------------------
回答2:
Add the following dependency and rebuild your project:
Note that the scope is set to test --
java.lang.NoClassDefFoundError is thrown when the class is found at compile time, but not at runtime. So you need to ensure this .jar is available at runtime
<dependency>
<groupId>io.cucumber</groupId>
<artifactId>cucumber-java</artifactId>
<version>5.1.3</version>
<scope>test</scope>
</dependency>
If you're using Eclipse, make sure that you have the project class path set to include the dependency and that it's built and embedded into the project
来源：https://stackoverflow.com/questions/60158172/cucumber-throwing-java-lang-noclassdeffounderror-io-cucumber-core-gherkin-featu