Revert "Fix Mockito meta test issue by clearing ObjenesisBase instant…

…iator cache when replacing the classloader"

This reverts commit ec6611c.

andy/src/main/java/nl/tudelft/cse1110/andy/execution/step/ReplaceClassloaderStep.java

@@ -4,16 +4,13 @@
 import nl.tudelft.cse1110.andy.config.DirectoryConfiguration;
 import nl.tudelft.cse1110.andy.execution.ExecutionStep;
 import nl.tudelft.cse1110.andy.result.ResultBuilder;
-import org.objenesis.ObjenesisStd;
 
-import java.lang.reflect.Field;
 import java.net.URL;
 import java.net.URLClassLoader;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.Arrays;
 import java.util.List;
-import java.util.concurrent.ConcurrentHashMap;
 
 /**
  * This step replaces the classloader with one that sees the folder
@@ -29,7 +26,6 @@ public void execute(Context ctx, ResultBuilder result) {
             String pathToAddToClassloader = dirCfg.getWorkingDir();
             replaceClassloader(ctx, pathToAddToClassloader);
             ctx.setClassloaderWithStudentsCode(Thread.currentThread().getContextClassLoader());
-            clearMockitoObjenesisInstantiatorCache();
         } catch (Exception e) {
             result.genericFailure(this, e);
         }
@@ -44,27 +40,6 @@ private void replaceClassloader(Context ctx, String pathToAddToClassloader) {
         Thread.currentThread().setContextClassLoader(customClassLoader);
     }
 
-    private void clearMockitoObjenesisInstantiatorCache() throws ReflectiveOperationException {
-            Class<?> defaultInstantiatorProviderClass = Class.forName(
-                    "org.mockito.internal.creation.instance.DefaultInstantiatorProvider");
-            Field objenesisInstantiatorField = defaultInstantiatorProviderClass.getDeclaredField("INSTANCE");
-            objenesisInstantiatorField.setAccessible(true);
-
-            // org.mockito.internal.creation.instance.ObjenesisInstantiator
-            Object objenesisInstantiator = objenesisInstantiatorField.get(null);
-            Field objenesisStdField = objenesisInstantiator.getClass().getDeclaredField("objenesis");
-            objenesisStdField.setAccessible(true);
-
-            // org.objenesis.ObjenesisStd extends ObjenesisBase
-            ObjenesisStd objenesisStd = (ObjenesisStd) objenesisStdField.get(objenesisInstantiator);
-            Field objenesisBaseCacheField = objenesisStd.getClass().getSuperclass().getDeclaredField("cache");
-            objenesisBaseCacheField.setAccessible(true);
-
-            // clear instantiator cache
-            ConcurrentHashMap<?, ?> cache = (ConcurrentHashMap<?, ?>) objenesisBaseCacheField.get(objenesisStd);
-            cache.clear();
-    }
-
     private URL toURL(Path path) {
         try {
             return path.toUri().toURL();