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JMockit is a Java toolkit for developer (unit/integration) testing. It contains mocking APIs and other tools, supporting both JUnit and TestNG. The mocking APIs allow all kinds of Java code, without testability restrictions, to be tested in isolation from selected dependencies.

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/*
 * Copyright (c) 2006-2011 Rogério Liesenfeld
 * This file is subject to the terms of the MIT license (see LICENSE.txt).
 */
package mockit.integration.junit4.internal;

import org.junit.runner.notification.*;
import org.junit.runner.*;

import mockit.*;
import mockit.integration.*;
import mockit.internal.state.*;
import mockit.internal.util.*;

/**
 * Startup mock which works in conjunction with {@link JUnit4TestRunnerDecorator} to provide JUnit 4.5+ integration.
 * 
 * This class is not supposed to be accessed from user code. JMockit will automatically load it at startup.
 */
@MockClass(realClass = RunNotifier.class, instantiation = Instantiation.PerMockedInstance)
public final class RunNotifierDecorator
{
   public RunNotifier it;

   @Mock(reentrant = true)
   public void fireTestStarted(Description description)
   {
      TestRun.enterNoMockingZone();

      try {
         Class currentTestClass = TestRun.getCurrentTestClass();

         if (currentTestClass != null) {
            String testClassName = getTestClassName(description);

            if (!testClassName.equals(currentTestClass.getName())) {
               Class testClass = Utilities.loadClass(testClassName);
               discardCurrentTestClassIfNoLongerValid(testClass);
            }
         }

         it.fireTestStarted(description);
      }
      finally {
         TestRun.exitNoMockingZone();
      }
   }

   private String getTestClassName(Description description)
   {
      String testClassName = description.getDisplayName();
      int p = testClassName.indexOf('(');
      return testClassName.substring(p + 1, testClassName.length() - 1);
   }

   private void discardCurrentTestClassIfNoLongerValid(Class testClass)
   {
      Class currentTestClass = TestRun.getCurrentTestClass();

      if (!currentTestClass.isAssignableFrom(testClass)) {
         TestRunnerDecorator.cleanUpMocksFromPreviousTestClass();
         TestRun.setCurrentTestClass(null);
      }
   }

   @Mock(reentrant = true)
   public void fireTestRunFinished(Result result)
   {
      TestRun.enterNoMockingZone();

      try {
         TestRunnerDecorator.cleanUpMocksFromPreviousTestClass();
         it.fireTestRunFinished(result);
      }
      finally {
         TestRun.exitNoMockingZone();
      }
   }
}