I have my own project that used to work perfectly with Java 8. The very basic testing frameworks I use are TestNG and JMockit.
Recently I upgraded my Java version to Java 9 and I noticed that JMockit test failed with a java modules access problem. Google took me to this stack overflow accepted solution module java.base does not read module java.desktop recommending upgrading JMockit to 1.34 or a later version. Following that I upgraded it to the latest version at the moment which is 1.43.
After doing this upgrade I no longer can run tests and all I am getting is a NullPointerException in the console output. My test to reproduce the issue is below:
package com.my.org;
import mockit.FullVerifications;
import mockit.Injectable;
import mockit.Tested;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
public class JMockitIssueTest {
private class Delegate {
public void doSomething() {
System.out.println("Doing something");
}
}
private class ClassUnderTest {
private final Delegate delegate;
private ClassUnderTest(Delegate delegate) {
this.delegate = delegate;
}
public void useDelegate() {
delegate.doSomething();
}
}
@BeforeMethod
public void setUp() throws Exception {
}
@Injectable
private Delegate delegate;
@Tested
private ClassUnderTest classUnderTest;
@Test
public void itShouldUseDelegate() {
classUnderTest.useDelegate();
new FullVerifications() {{
delegate.doSomething();
}};
}
}
Initially the setUp method was not there but after adding an empty one I got a bit more information in the console output which I am listing below:
Test ignored.
java.lang.NullPointerException
at mockit.integration.testng.TestNGRunnerDecorator.beforeInvocation(TestNGRunnerDecorator.java:32)
at org.testng.internal.invokers.InvokedMethodListenerInvoker$InvokeBeforeInvocationWithoutContextStrategy.callMethod(InvokedMethodListenerInvoker.java:84)
at org.testng.internal.invokers.InvokedMethodListenerInvoker.invokeListener(InvokedMethodListenerInvoker.java:62)
at org.testng.internal.Invoker.runInvokedMethodListeners(Invoker.java:493)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:533)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:719)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:989)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:125)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:109)
at org.testng.TestRunner.privateRun(TestRunner.java:648)
at org.testng.TestRunner.run(TestRunner.java:505)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:455)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:450)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:415)
at org.testng.SuiteRunner.run(SuiteRunner.java:364)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:84)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1208)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1137)
at org.testng.TestNG.runSuites(TestNG.java:1049)
at org.testng.TestNG.run(TestNG.java:1017)
at org.testng.IDEARemoteTestNG.run(IDEARemoteTestNG.java:72)
at org.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:123)
I tried multiple permutations such as using a @Mocked Delegate instance and creating the ClassUnderTest myself or even rolling back to Java 8. No luck.
I even tried to move the test to jUnit (not really a desired option as there are over 1400 test classes). At the moment I am running out of ideas but on the other hand the above use case is so basic that I really hope I am doing a stupid thing not being aware about what changed in the JMockit world since I was using 1.27 version of this mocking framework.
Thank u in advance for your options.
Maybe @Rogério means to look to the Release Notes, in which from version 1.42 the use of a -javaagent JVM parameter is needed.
Try that, it's also mentioned on Running Tests part