Problem with Java 17

[lofidewanto]

Hi,

in this test class: https://github.com/gwtboot/gwt-boot-samples/blob/master/gwt-boot-sample-collection/src/test/java/com/github/gwtboot/sample/collection/client/ui/HelloWorldViewTest.java

... I'm using gwtmockito and with Java 11 everything works fine.

With Java 17 I get following error:

-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Running com.github.gwtboot.sample.collection.client.ui.HelloWorldViewTest
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.174 sec <<< FAILURE!
com.github.gwtboot.sample.collection.client.ui.HelloWorldViewTest  Time elapsed: 0.174 sec  <<< ERROR!
java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
        at com.google.gwtmockito.GwtMockitoTestRunner.withBefores(GwtMockitoTestRunner.java:398)
        at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:276)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
        at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
        at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
        at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
        at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
        at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
        at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
        at com.google.gwtmockito.GwtMockitoTestRunner.run(GwtMockitoTestRunner.java:376)
        at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)
        at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
        at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:568)
        at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
        at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
        at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
        at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
        at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)
Caused by: java.lang.reflect.InvocationTargetException
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:568)
        at com.google.gwtmockito.GwtMockitoTestRunner.withBefores(GwtMockitoTestRunner.java:396)
        ... 22 more
Caused by: java.lang.ExceptionInInitializerError
        at org.mockito.cglib.core.KeyFactory$Generator.generateClass(KeyFactory.java:167)
        at org.mockito.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
        at org.mockito.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:217)
        at org.mockito.cglib.core.KeyFactory$Generator.create(KeyFactory.java:145)
        at org.mockito.cglib.core.KeyFactory.create(KeyFactory.java:117)
        at org.mockito.cglib.core.KeyFactory.create(KeyFactory.java:109)
        at org.mockito.cglib.core.KeyFactory.create(KeyFactory.java:105)
        at org.mockito.cglib.proxy.Enhancer.<clinit>(Enhancer.java:70)
        at org.mockito.internal.creation.cglib.ClassImposterizer.createProxyClass(ClassImposterizer.java:95)
        at org.mockito.internal.creation.cglib.ClassImposterizer.imposterise(ClassImposterizer.java:57)
        at org.mockito.internal.creation.cglib.ClassImposterizer.imposterise(ClassImposterizer.java:49)
        at org.mockito.internal.creation.cglib.CglibMockMaker.createMock(CglibMockMaker.java:24)
        at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:33)
        at org.mockito.internal.MockitoCore.mock(MockitoCore.java:59)
        at org.mockito.Mockito.mock(Mockito.java:1285)
        at org.mockito.Mockito.mock(Mockito.java:1163)
        at com.google.gwtmockito.GwtMockito.registerGwtMocks(GwtMockito.java:203)
        at com.google.gwtmockito.GwtMockito.initMocks(GwtMockito.java:133)
        ... 27 more
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to unnamed module @a803f94
        at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354)
        at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
        at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:199)
        at java.base/java.lang.reflect.Method.setAccessible(Method.java:193)
        at org.mockito.cglib.core.ReflectUtils$2.run(ReflectUtils.java:57)
        at java.base/java.security.AccessController.doPrivileged(AccessController.java:318)
        at org.mockito.cglib.core.ReflectUtils.<clinit>(ReflectUtils.java:47)
        ... 45 more


Results :

Tests in error: 
  com.github.gwtboot.sample.collection.client.ui.HelloWorldViewTest: java.lang.reflect.InvocationTargetException

Tests run: 1, Failures: 0, Errors: 1, Skipped: 0

Any helps are appreciated, thanks a lot!

[zbynek]

I think you need to pass the necessary add-opens to the Java command that runs the tests. In Gradle it would be something like

tasks.withType<Test>().configureEach {
    jvmArgs("--add-opens", "java.base/java.lang=ALL-UNNAMED")
}