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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) 2006-2013 Rogério Liesenfeld
 * This file is subject to the terms of the MIT license (see LICENSE.txt).
 */
package mockit.internal.mockups;

import java.lang.reflect.*;
import java.util.*;

import org.jetbrains.annotations.*;

/**
 * Holds state associated with mock class containing {@linkplain mockit.Mock annotated mocks}.
 */
public final class MockStates
{
   /**
    * For each mock class containing @Mock annotations with at least one invocation expectation specified or at least
    * one reentrant mock, a runtime state will be kept here.
    */
   @NotNull private final Map> mockClassToMockStates;

   /**
    * For each annotated mock method with at least one invocation expectation, its mock state will
    * also be kept here, as an optimization.
    */
   @NotNull private final Set mockStatesWithExpectations;

   public MockStates()
   {
      mockClassToMockStates = new HashMap>(8);
      mockStatesWithExpectations = new LinkedHashSet(10);
   }

   void addMockStates(@NotNull List mockStates)
   {
      for (MockState mockState : mockStates) {
         if (mockState.isWithExpectations()) {
            mockStatesWithExpectations.add(mockState);
         }
      }
   }

   void addMockClassAndItsStates(@NotNull String mockClassInternalName, @NotNull List mockStates)
   {
      mockClassToMockStates.put(mockClassInternalName, mockStates);
   }

   public void removeClassState(@NotNull Class redefinedClass, @Nullable String internalNameForOneOrMoreMockClasses)
   {
      removeMockStates(redefinedClass);

      if (internalNameForOneOrMoreMockClasses != null) {
         if (internalNameForOneOrMoreMockClasses.indexOf(' ') < 0) {
            removeMockStates(internalNameForOneOrMoreMockClasses);
         }
         else {
            String[] mockClassesInternalNames = internalNameForOneOrMoreMockClasses.split(" ");

            for (String mockClassInternalName : mockClassesInternalNames) {
               removeMockStates(mockClassInternalName);
            }
         }
      }
   }

   private void removeMockStates(@NotNull Class redefinedClass)
   {
      for (Iterator> itr = mockClassToMockStates.values().iterator(); itr.hasNext(); ) {
         List mockStates = itr.next();
         MockState mockState = mockStates.get(0);

         if (mockState.getRealClass() == redefinedClass) {
            mockStatesWithExpectations.removeAll(mockStates);
            mockStates.clear();
            itr.remove();
         }
      }
   }

   private void removeMockStates(@NotNull String mockClassInternalName)
   {
      List mockStates = mockClassToMockStates.remove(mockClassInternalName);

      if (mockStates != null) {
         mockStatesWithExpectations.removeAll(mockStates);
      }
   }

   public boolean updateMockState(@NotNull String mockClassName, int mockStateIndex)
   {
      MockState mockState = getMockState(mockClassName, mockStateIndex);
      if (mockState == null) return false;

      if (mockState.isOnReentrantCall()) {
         mockState.exitReentrantCall();
         return false;
      }

      mockState.update();
      return true;
   }

   @Nullable MockState getMockState(@NotNull String mockClassInternalName, int mockStateIndex)
   {
      List mockStates = mockClassToMockStates.get(mockClassInternalName);
      return mockStates.get(mockStateIndex);
   }

   @Nullable
   public Method getMockMethod(
      @NotNull String mockClassDesc, int mockStateIndex, @NotNull Class mockClass, @NotNull Class[] paramTypes)
   {
      MockState mockState = getMockState(mockClassDesc, mockStateIndex);

      if (mockState != null) {
         return mockState.getMockMethod(mockClass, paramTypes);
      }

      return null;
   }

   public void exitReentrantMock(@NotNull String mockClassInternalName, int mockStateIndex)
   {
      MockState mockState = getMockState(mockClassInternalName, mockStateIndex);

      if (mockState != null) {
         mockState.exitReentrantCall();
      }
   }

   @Nullable
   public MockInvocation createMockInvocation(
      @NotNull String mockClassInternalName, int mockStateIndex, @Nullable Object invokedInstance,
      @NotNull Object[] invokedArguments)
   {
      MockState mockState = getMockState(mockClassInternalName, mockStateIndex);
      return mockState == null ? null : new MockInvocation(invokedInstance, invokedArguments, mockState);
   }

   public void verifyExpectations()
   {
      for (MockState mockState : mockStatesWithExpectations) {
         mockState.verifyExpectations();
      }
   }

   public void resetExpectations()
   {
      for (MockState mockState : mockStatesWithExpectations) {
         mockState.reset();
      }
   }
}