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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 Rogério Liesenfeld
 * This file is subject to the terms of the MIT license (see LICENSE.txt).
 */
package mockit.internal.injection;

import java.lang.reflect.*;
import javax.annotation.*;

import static java.lang.reflect.Modifier.isFinal;

import mockit.*;
import static mockit.internal.reflection.FieldReflection.*;

final class TestedField extends TestedObject
{
   @Nonnull private final Field testedField;

   TestedField(@Nonnull InjectionState injectionState, @Nonnull Field field, @Nonnull Tested metadata)
   {
      super(injectionState, metadata, field.getName(), field.getGenericType(), field.getType());
      testedField = field;
   }

   @Override
   boolean alreadyInstantiated(@Nonnull Object testClassInstance)
   {
      return isAvailableDuringSetup() && getFieldValue(testedField, testClassInstance) != null;
   }

   @Nullable @Override
   Object getExistingTestedInstanceIfApplicable(@Nonnull Object testClassInstance)
   {
      Object testedObject = null;

      if (!createAutomatically) {
         testedObject = getFieldValue(testedField, testClassInstance);
         createAutomatically = testedObject == null && !isFinal(testedField.getModifiers());
      }

      return testedObject;
   }

   @Override
   void setInstance(@Nonnull Object testClassInstance, @Nullable Object testedInstance)
   {
      setFieldValue(testedField, testClassInstance, testedInstance);
   }
}