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JMockit is a Java toolkit for automated developer testing. It contains mocking/faking APIs and a code coverage tool, 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 JMockit developers
 * This file is subject to the terms of the MIT license (see LICENSE.txt).
 */
package mockit.integration.junit5;

import org.junit.jupiter.api.extension.*;
import org.junit.jupiter.engine.extension.*;
import org.junit.platform.engine.*;
import org.junit.platform.engine.support.descriptor.*;

import mockit.*;
import mockit.internal.startup.*;

public final class JMockitTestEngine implements TestEngine
{
   private static TestDescriptor descriptor;

   public JMockitTestEngine() {
      if (descriptor != null) {
         return; // already created in same test run
      }

      descriptor = new EngineDescriptor(UniqueId.forEngine("jmockit"), "JMockit integration");

      if (Startup.initializeIfPossible()) {
         new MockUp() {
            @Mock
            ExtensionRegistry createRegistryWithDefaultExtensions(Invocation inv, ConfigurationParameters configParams) {
               ExtensionRegistry registry = inv.proceed();

               Extension extension = new JMockitExtension();
               registry.registerExtension(extension, extension);

               return registry;
            }
         };
      }
   }

   @Override
   public String getId() { return "jmockit"; }

   @Override
   public TestDescriptor discover(EngineDiscoveryRequest discoveryRequest, UniqueId uniqueId) { return descriptor; }

   @Override
   public void execute(ExecutionRequest executionRequest) {
      EngineExecutionListener executionListener = executionRequest.getEngineExecutionListener();
      executionListener.executionStarted(descriptor);
      executionListener.executionFinished(descriptor, TestExecutionResult.successful());
   }
}