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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.internal.expectations.argumentMatching;

import java.lang.reflect.Array;

public class EqualityMatcher implements ArgumentMatcher
{
   final Object object;

   public EqualityMatcher(Object equalArg) { object = equalArg; }
   public boolean matches(Object argValue) { return areEqual(argValue, object); }
   public void writeMismatchPhrase(ArgumentMismatch argumentMismatch) { argumentMismatch.appendFormatted(object); }

   public static boolean areEqual(Object o1, Object o2)
   {
      if (o1 == null) {
         return o2 == null;
      }
      else if (o2 == null) {
         return false;
      }
      else if (o1 == o2) {
         return true;
      }

      return areEqualWhenNonNull(o1, o2);
   }

   public static boolean areEqualWhenNonNull(Object o1, Object o2)
   {
      if (isArray(o1)) {
         return isArray(o2) && areArraysEqual(o1, o2);
      }

      return o1.equals(o2);
   }

   private static boolean isArray(Object o) { return o.getClass().isArray(); }

   private static boolean areArraysEqual(Object array1, Object array2)
   {
      int length1 = Array.getLength(array1);

      if (length1 != Array.getLength(array2)) {
         return false;
      }

      for (int i = 0; i < length1; i++) {
         Object value1 = Array.get(array1, i);
         Object value2 = Array.get(array2, i);

         if (!areEqual(value1, value2)) {
            return false;
         }
      }

      return true;
   }
}