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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.expectations;

import java.util.*;

import static mockit.internal.util.Utilities.containsReference;

import mockit.internal.expectations.invocation.*;
import mockit.internal.state.*;
import mockit.internal.util.*;

final class PhasedExecutionState
{
   final List expectations;
   final List nonStrictExpectations;
   final List verifiedExpectations;
   final Map instanceMap;
   final Map replacementMap;
   private List dynamicMockInstancesToMatch;
   private List> mockedTypesToMatchOnInstances;

   PhasedExecutionState()
   {
      expectations = new ArrayList();
      nonStrictExpectations = new ArrayList();
      verifiedExpectations = new ArrayList();
      instanceMap = new IdentityHashMap();
      replacementMap = new IdentityHashMap();
   }

   void setDynamicMockInstancesToMatch(List dynamicMockInstancesToMatch)
   {
      this.dynamicMockInstancesToMatch = dynamicMockInstancesToMatch;
   }

   void discoverMockedTypesToMatchOnInstances(List> targetClasses)
   {
      int numClasses = targetClasses.size();

      if (numClasses > 1) {
         for (int i = 0; i < numClasses; i++) {
            Class targetClass = targetClasses.get(i);

            if (targetClasses.lastIndexOf(targetClass) > i) {
               addMockedTypeToMatchOnInstance(targetClass);
            }
         }
      }
   }

   void addMockedTypeToMatchOnInstance(Class mockedType)
   {
      if (mockedTypesToMatchOnInstances == null) {
         mockedTypesToMatchOnInstances = new LinkedList>();
      }

      if (!containsReference(mockedTypesToMatchOnInstances, mockedType)) {
         mockedTypesToMatchOnInstances.add(mockedType);
      }
   }

   void addExpectation(Expectation expectation, boolean nonStrict)
   {
      ExpectedInvocation invocation = expectation.invocation;
      forceMatchingOnMockInstanceIfRequired(invocation);
      removeMatchingExpectationsCreatedBefore(invocation);

      if (nonStrict) {
         nonStrictExpectations.add(expectation);
      }
      else {
         expectations.add(expectation);
      }
   }

   private void forceMatchingOnMockInstanceIfRequired(ExpectedInvocation invocation)
   {
      if (isToBeMatchedOnInstance(invocation.instance, invocation.getMethodNameAndDescription())) {
         invocation.matchInstance = true;
      }
   }

   boolean isToBeMatchedOnInstance(Object mock, String mockNameAndDesc)
   {
      if (mock == null || mockNameAndDesc.charAt(0) == '<') {
         return false;
      }
      else if (dynamicMockInstancesToMatch != null && containsReference(dynamicMockInstancesToMatch, mock)) {
         return true;
      }
      else if (mockedTypesToMatchOnInstances != null) {
         Class mockedClass = GeneratedClasses.getMockedClass(mock);

         if (containsReference(mockedTypesToMatchOnInstances, mockedClass)) {
            return true;
         }
      }
      else if (TestRun.getExecutingTest().isInjectableMock(mock)) {
         return true;
      }

      return false;
   }

   private void removeMatchingExpectationsCreatedBefore(ExpectedInvocation invocation)
   {
      Expectation previousExpectation = findPreviousNonStrictExpectation(invocation);

      if (previousExpectation != null) {
         nonStrictExpectations.remove(previousExpectation);
         invocation.copyDefaultReturnValue(previousExpectation.invocation);
      }
   }

   private Expectation findPreviousNonStrictExpectation(ExpectedInvocation newInvocation)
   {
      Object mock = newInvocation.instance;
      String mockClassDesc = newInvocation.getClassDesc();
      String mockNameAndDesc = newInvocation.getMethodNameAndDescription();
      InvocationArguments arguments = newInvocation.arguments;
      Object[] argValues = arguments.getValues();

      boolean staticOrConstructorInvocation = mock == null || newInvocation.isConstructor();
      boolean newInvocationWithMatchers = arguments.getMatchers() != null;

      for (int i = 0, n = nonStrictExpectations.size(); i < n; i++) {
         Expectation previousExpectation = nonStrictExpectations.get(i);
         ExpectedInvocation previousInvocation = previousExpectation.invocation;

         if (
            previousInvocation.isMatch(mockClassDesc, mockNameAndDesc) &&
            (staticOrConstructorInvocation || isMatchingInstance(mock, previousExpectation)) &&
            (newInvocationWithMatchers && arguments.hasEquivalentMatchers(previousInvocation.arguments) ||
             !newInvocationWithMatchers && previousInvocation.arguments.isMatch(argValues, instanceMap))
         ) {
            return previousExpectation;
         }
      }

      return null;
   }

   Expectation findNonStrictExpectation(Object mock, String mockClassDesc, String mockNameAndDesc, Object[] args)
   {
      boolean constructorInvocation = mockNameAndDesc.charAt(0) == '<';
      boolean staticOrConstructorInvocation = mock == null || constructorInvocation;
      Expectation replayExpectationFound = null;

      // Note: new expectations might get added to the list, so a regular loop would cause a CME:
      for (int i = 0, n = nonStrictExpectations.size(); i < n; i++) {
         Expectation nonStrict = nonStrictExpectations.get(i);

         if (replayExpectationFound != null && nonStrict.recordPhase == null) {
            continue;
         }

         ExpectedInvocation invocation = nonStrict.invocation;

         if (
            invocation.isMatch(mockClassDesc, mockNameAndDesc) &&
            (staticOrConstructorInvocation || isMatchingInstance(mock, nonStrict)) &&
            invocation.arguments.isMatch(args, instanceMap)
         ) {
            if (nonStrict.recordPhase == null) {
               replayExpectationFound = nonStrict;
               continue;
            }

            if (constructorInvocation && invocation.replacementInstance != null) {
               replacementMap.put(mock, invocation.replacementInstance);
            }

            return nonStrict;
         }
      }

      return replayExpectationFound;
   }

   private boolean isMatchingInstance(Object mock, Expectation expectation)
   {
      ExpectedInvocation invocation = expectation.invocation;

      if (invocation.instance == replacementMap.get(mock) || invocation.isEquivalentInstance(mock, instanceMap)) {
         return true;
      }

      if (TestRun.getExecutingTest().isInjectableMock(mock)) {
         return false;
      }

      if (dynamicMockInstancesToMatch != null) {
         if (containsReference(dynamicMockInstancesToMatch, mock)) {
            return false;
         }

         Class invokedClass = invocation.instance.getClass();

         for (Object dynamicMock : dynamicMockInstancesToMatch) {
            if (dynamicMock.getClass() == invokedClass) {
               return false;
            }
         }
      }

      return !invocation.matchInstance && expectation.recordPhase != null;
   }

   Object getReplacementInstanceForMethodInvocation(Object invokedInstance, String methodNameAndDesc)
   {
      return methodNameAndDesc.charAt(0) == '<' ? null : replacementMap.get(invokedInstance);
   }
}