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I've enabled inlined mocks so that I can mock final classes but now I get the following exception when running tests with Junit.
When I run all the tests at once only two tests fail, but if I run tests individually then most of them fail.
I'm not using any scala or android classes (that I'm aware of). I am using lombok but I tried removing lombok annotations any it didn't fix the problem.
When removing mock-maker-inline the problem goes away, but I'd rather keep it.
How should I address this problem?
org.mockito.exceptions.base.MockitoException:
Mockito cannot mock this class: class com.example.MyClass.
If you're not sure why you're getting this error, please report to the mailing list.
Java : 1.8
JVM vendor name : Oracle Corporation
JVM vendor version : 25.112-b15
JVM name : Java HotSpot(TM) 64-Bit Server VM
JVM version : 1.8.0_112-b15
JVM info : mixed mode
OS name : Windows 10
OS version : 10.0
You are seeing this disclaimer because Mockito is configured to create inlined mocks.
You can learn about inline mocks and their limitations under item #39 of the Mockito class javadoc.
Underlying exception : org.mockito.exceptions.base.MockitoException: Could not modify all classes [interface java.lang.AutoCloseable, class com.example.MyClass, interface java.io.Closeable, class java.lang.Object]
at org.mockito.internal.junit.JUnitRule$1.evaluate(JUnitRule.java:42)
at org.junit.rules.ExpectedException$ExpectedExceptionStatement.evaluate(ExpectedException.java:239)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
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$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:539)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:761)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:461)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:207)
Caused by: org.mockito.exceptions.base.MockitoException: Could not modify all classes [interface java.lang.AutoCloseable, class com.example.MyClass, interface java.io.Closeable, class java.lang.Object]
at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:138)
at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:346)
at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:161)
at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:355)
... 18 more
Caused by: java.lang.IllegalStateException:
Byte Buddy could not instrument all classes within the mock's type hierarchy
This problem should never occur for javac-compiled classes. This problem has been observed for classes that are:
- Compiled by older versions of scalac
- Classes that are part of the Android distribution
at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.triggerRetransformation(InlineBytecodeGenerator.java:120)
at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.mockClass(InlineBytecodeGenerator.java:97)
at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator$1.call(TypeCachingBytecodeGenerator.java:37)
at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator$1.call(TypeCachingBytecodeGenerator.java:34)
at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:138)
at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:346)
at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:161)
at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:355)
at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.mockClass(TypeCachingBytecodeGenerator.java:32)
at org.mockito.internal.creation.bytebuddy.InlineByteBuddyMockMaker.createMockType(InlineByteBuddyMockMaker.java:200)
at org.mockito.internal.creation.bytebuddy.InlineByteBuddyMockMaker.createMock(InlineByteBuddyMockMaker.java:181)
at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:35)
at org.mockito.internal.MockitoCore.mock(MockitoCore.java:65)
at org.mockito.Mockito.mock(Mockito.java:1821)
at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:36)
at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:16)
at org.mockito.internal.configuration.IndependentAnnotationEngine.createMockFor(IndependentAnnotationEngine.java:38)
at org.mockito.internal.configuration.IndependentAnnotationEngine.process(IndependentAnnotationEngine.java:62)
at org.mockito.internal.configuration.InjectingAnnotationEngine.processIndependentAnnotations(InjectingAnnotationEngine.java:57)
at org.mockito.internal.configuration.InjectingAnnotationEngine.process(InjectingAnnotationEngine.java:41)
at org.mockito.MockitoAnnotations.initMocks(MockitoAnnotations.java:69)
... 18 more
Caused by: java.lang.IllegalStateException: Error invoking java.lang.reflect.Executable#getParameters
at net.bytebuddy.description.method.ParameterDescription$ForLoadedParameter$Dispatcher$ForJava8CapableVm.getParameter(ParameterDescription.java:387)
at net.bytebuddy.description.method.ParameterDescription$ForLoadedParameter$Dispatcher$ForJava8CapableVm.isNamePresent(ParameterDescription.java:355)
at net.bytebuddy.description.method.ParameterDescription$ForLoadedParameter.isNamed(ParameterDescription.java:227)
at net.bytebuddy.description.method.ParameterDescription$AbstractBase.asToken(ParameterDescription.java:147)
at net.bytebuddy.description.method.ParameterDescription$AbstractBase.asToken(ParameterDescription.java:107)
at net.bytebuddy.description.method.ParameterList$AbstractBase.asTokenList(ParameterList.java:80)
at net.bytebuddy.description.method.MethodDescription$AbstractBase.asToken(MethodDescription.java:693)
at net.bytebuddy.description.method.MethodDescription$AbstractBase.asToken(MethodDescription.java:334)
at net.bytebuddy.description.method.MethodList$AbstractBase.asTokenList(MethodList.java:53)
at net.bytebuddy.dynamic.scaffold.InstrumentedType$Factory$Default$1.represent(InstrumentedType.java:223)
at net.bytebuddy.ByteBuddy.redefine(ByteBuddy.java:698)
at net.bytebuddy.ByteBuddy.redefine(ByteBuddy.java:676)
at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.transform(InlineBytecodeGenerator.java:167)
at sun.instrument.TransformerManager.transform(TransformerManager.java:188)
at sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:428)
at sun.instrument.InstrumentationImpl.retransformClasses0(Native Method)
at sun.instrument.InstrumentationImpl.retransformClasses(InstrumentationImpl.java:144)
at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.triggerRetransformation(InlineBytecodeGenerator.java:117)
... 38 more
Caused by: java.lang.reflect.MalformedParametersException: Invalid parameter name ""
at java.lang.reflect.Executable.verifyParameters(Executable.java:386)
at java.lang.reflect.Executable.privateGetParameters(Executable.java:416)
at java.lang.reflect.Executable.getParameters(Executable.java:357)
at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at net.bytebuddy.description.method.ParameterDescription$ForLoadedParameter$Dispatcher$ForJava8CapableVm.getParameter(ParameterDescription.java:383)
... 55 more
Using mockito-core 2.13.0 and byte-buddy 1.7.9.
503
The latest version of Mockito can be found via https://search.maven.org/artifact/org.mockito/mockito-core. To use Mockito in your Maven project, add the following dependency to your pom file. It assumes that you already added the dependencies for your test framework, e.g. JUnit 5. Use 3.12.
MockitoAnnotations. initMocks(this); initializes fields annotated with Mockito annotations. Allows shorthand creation of objects required for testing. Minimizes repetitive mock creation code. Makes the test class more readable.
initMocks. Deprecated. Use openMocks(Object) instead. This method is equivalent to openMocks(testClass).
You can use doReturn-when to specify a return value on a spied object without making a side effect. It is useful but should be used rarely. The more you have a better pattern such as MVP, MVVM and dependency injection, the less chance you need to use Mockito. spy .
I got around this by upgrading to the latest version of mockito. Currently it is:
testImplementation "org.mockito:mockito-core:2.25.1"
After that I had some build errors which was resolved by selecting
File->Invalidate Caches / Restart...
Try using the newest version of ByteBuddy:
<dependency>
<groupId>net.bytebuddy</groupId>
<artifactId>byte-buddy</artifactId>
<version>1.8.11</version>
</dependency>
I have tried this with Mockito Inline 2.15.0 and it has resolved the same issue with my application. It appears as though this is a known issue and has been resolved in the newest version of ByteBuddy.
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