NullPointerException on uninitialized static fields

[rewolf]

What steps will reproduce the problem?

Include a static field with no value assigned

What is the code that triggers this problem?

Class under test:

public class Pojo {

    private static Integer[] MY_STATIC_THAT_MAKES_YOU_SAD;

    @Override
    public final boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || !(o instanceof Pojo)) {
            return false;
        }
        return true;
    }

    @Override
    public final int hashCode() {
        return 0;
    }
}

Test:

    @Test
    public void testEquals() throws Exception {
        EqualsVerifier.forClass(Pojo.class).suppress(Warning.NONFINAL_FIELDS).verify();
    }

What error message or stack trace does EqualsVerifier give?

java.lang.AssertionError: NullPointerException: 
For more information, go to: http://www.jqno.nl/equalsverifier/errormessages

	at nl.jqno.equalsverifier.EqualsVerifier.handleError(EqualsVerifier.java:381)
	at nl.jqno.equalsverifier.EqualsVerifier.verify(EqualsVerifier.java:370)
	at PojoTest.equals(PojoTest.java:13)
	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:483)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:117)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:262)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:84)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:483)
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: java.lang.NullPointerException
	at nl.jqno.equalsverifier.FieldsChecker$ArrayFieldCheck.arrayCopy(FieldsChecker.java:261)
	at nl.jqno.equalsverifier.FieldsChecker$ArrayFieldCheck.replaceInnermostArrayValue(FieldsChecker.java:256)
	at nl.jqno.equalsverifier.FieldsChecker$ArrayFieldCheck.execute(FieldsChecker.java:245)
	at nl.jqno.equalsverifier.FieldInspector.check(FieldInspector.java:40)

What did you expect?

A proper test response. This NullPointerException is unexpected and doesn't occur with old versions of EqualsVerifier (< 2.0)

Which version of EqualsVerifier are you using?

2.+ (2.1.8)

[jqno]

Reproduced, exactly as you said. Thanks for reporting this! I'll try to fix this in the next release.

[rewolf]

Thanks for the quick response!

[jqno]

No problem! I'll probably make a release this weekend.

…

On Thu, Jan 12, 2017 at 11:48 PM Andrew Flower ***@***.***> wrote: Thanks for the quick response! — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub <#165 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AA0osYaF0ZPxpIcL2QU7CCoO-tx-NTvQks5rRq3AgaJpZM4Lha-a> .

[jqno]

I've just made a release for this: version 2.2.