Could not initialize plugin: interface org.mockito.plugins.MockMaker

Question

I\'m getting following exception once tests is started:

    Testcase: treeCtorArgumentTest(com.xythos.client.drive.cachedtree.CachedTreeTest):  Caused an ERR         


        

Answer 1

This problem with Mockito2 occurs if you enable the option to mock final classes.

This means when in your test/resources/mockito-extensions directory you have the file called org.mockito.plugins.MockMaker with the following content mock-maker-inline.

In that case byte-buddy, which is a transitive dependency for mockito-core, has the problem to attach own agent to the java process. But the problem occurs only when you use JRE.

The solution would be either:

• Use JDK instead of JRE

or

• add -javaagent:byte-buddy-agent-*.jar as a VM option