Karate: Why NullPointerException at FileUtils happens for mvn clean-integration-test? - karate

Question

Our Karate Scripts for Integration Test works as expected when we use the cmd- mvn integration-test. if we use clean it fails with the below error and the successfully executed test not executing again.
Error log given below when we use the cmd - mvn clean integration-test
[INFO] --- maven-failsafe-plugin:2.13:integration-test (default) # formfill ---
[INFO] Failsafe report directory: D:\Baskaran\wvid-stash\formfill\target\failsafe-reports
-------------------------------------------------------
T E S T S
-------------------------------------------------------
Running com.dnb.vici.formfill.it.FormFill_ITSuite
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.27 sec <<< FAILURE!
initializationError(com.dnb.vici.formfill.it.FormFill_ITSuite) Time elapsed: 0.008 sec <<< ERROR!
java.lang.NullPointerException: null
at com.intuit.karate.FileUtils.resolveIfClassPath(FileUtils.java:157)
at com.intuit.karate.cucumber.KarateFeature.<init>(KarateFeature.java:47)
at com.intuit.karate.cucumber.KarateFeature.loadFeatures(KarateFeature.java:62)
at com.intuit.karate.junit4.Karate.<init>(Karate.java:53)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:104)
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.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:33)
at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:262)
at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:153)
at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:124)
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 org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray2(ReflectionUtils.java:208)
at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:158)
at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:86)
at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:153)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:95)
Our configuration in POM is given below for reference.
<!-- Following plugin executes the unit tests -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.14.1</version><!--$NO-MVN-MAN-VER$ -->
</plugin>
<!-- Following plugin executes the integration tests -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-failsafe-plugin</artifactId>
<version>2.13</version><!--$NO-MVN-MAN-VER$ -->
<configuration>
<includes>
<include>**/FormFill_ITSuite.java</include>
</includes>
<testFailureIgnore>true</testFailureIgnore>
</configuration>
<executions>
<execution>
<id>integration-test</id>
<goals>
<goal>integration-test</goal>
</goals>
</execution>
</executions>
</plugin>

Answer 1

I encountered the same NullPointerException when I compiled my tests with JDK 1.7.0_75. Using 1.8.0_72 instead worked.
You say your tests work before and they stop working when using 'mvn clean'. Unfortunately you don't tell us how you got them working in the first place. But 'mvn clean' removes the existing artifacts and if they are then compiled again with an older JDK, the NullPointerException occurs.