NullPointerException with TestContext.retrieveContextLoaderClass(TestContext .java:197

[sldahlin]

I am trying to create some Integration tests and I am encountering an error when I try to run the test. I get an assert failure in the TestContext.java (121) indicating that the applicationcontext is null. However the test java file has the following line:

@ContextConfiguration(locations = { "classpath:com/agg/dao/JpaIntegrationTests-context.xml" })

The xml does exist but when I run the test Sysinternals procman never indicates that the xml file is being searched for. I am unclear as to what is really going on with this basic example.

[nicolas.loriente]

File is being found if not you would have gotten FileNotFoundException.

Where is the NPE coming from? Is it from a collaborator that was supposed to be injected?

Are you running Spring's JUnit class runner? Your test should look like this for example:

@RunWith( SpringJUnit4ClassRunner.class ) 
@ContextConfiguration(locations = { "classpath:com/agg/dao/JpaIntegrationTests-context.xml" })
public class TestContext {

    @Autowired
    private SomeBeanInYourContext someBeanInYourContext;

    @Test
    public void testSomething() {
        .....
        someBeanInYourContext.doSomething();
        ....
    }
}

You might want to add logging so you can see what spring is doing. Just add a simple log4j.properties to your classpath.
Example log4j.properties

log4j.rootLogger=info, stdout

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - <%m>%n

log4j.logger.org.springframework=info

[sldahlin]

Here is the complete test. I am still encountering the initializationError:

package com.hwcs.veri.agg.dao;
import static org.junit.Assert.assertEquals;
import java.util.List;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.AbstractTransactionalJUnit4SpringContextTests;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.transaction.TransactionConfiguration;
import org.springframework.transaction.annotation.Transactional;
import com.hwcs.veri.jpa.License;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "/JpaIntegrationTests-context.xml" })
@TransactionConfiguration( transactionManager = "transactionManager", 
                           defaultRollback    = true )
@Transactional
public class JpaIntegrationTests 
 extends     AbstractTransactionalJUnit4SpringContextTests 
{
  @Autowired
  protected LicenseDao licenseDao;
  @Test
  public void getLicenses()
  {
    List<License> licenses = this.licenseDao.getLicenses();   
    assertEquals( "Expecting 1 license from the query",
                  super.countRowsInTable( "product_schema.license" ),
                  licenses.size() );                  
  }
}

Is there some particular step that needs to be done to run this as a JUnit test inside Eclipse?

[nicolas.loriente]

Can you post the complete stack trace?

[sldahlin]

java.lang.NullPointerException
at org.springframework.test.context.TestContext.retri eveContextLoaderClass(TestContext.java:197)
at org.springframework.test.context.TestContext.<init >(TestContext.java:121)
at org.springframework.test.context.TestContextManage r.<init>(TestContextManager.java:117)
at org.springframework.test.context.junit4.SpringJUni t4ClassRunner.createTestContextManager(SpringJUnit 4ClassRunner.java:120)
at org.springframework.test.context.junit4.SpringJUni t4ClassRunner.<init>(SpringJUnit4ClassRunner.java: 108)
at sun.reflect.NativeConstructorAccessorImpl.newInsta nce0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInsta nce(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newI nstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Construc tor.java:513)
at org.junit.internal.builders.AnnotatedBuilder.build Runner(AnnotatedBuilder.java:31)
at org.junit.internal.builders.AnnotatedBuilder.runne rForClass(AnnotatedBuilder.java:24)
at org.junit.runners.model.RunnerBuilder.safeRunnerFo rClass(RunnerBuilder.java:57)
at org.junit.internal.builders.AllDefaultPossibilitie sBuilder.runnerForClass(AllDefaultPossibilitiesBui lder.java:29)
at org.junit.runners.model.RunnerBuilder.safeRunnerFo rClass(RunnerBuilder.java:57)
at org.junit.internal.requests.ClassRequest.getRunner (ClassRequest.java:24)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestR eference.<init>(JUnit4TestReference.java:32)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestC lassReference.<init>(JUnit4TestClassReference.java :25)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestL oader.createTest(JUnit4TestLoader.java:41)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestL oader.loadTests(JUnit4TestLoader.java:31)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRu nner.runTests(RemoteTestRunner.java:452)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRu nner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRu nner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRu nner.main(RemoteTestRunner.java:197)

As I modified my last post to indicate is there some particular step that needs to be done to run this as a JUnit test inside Eclipse?