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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) 2006-2012 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.*;

import mockit.internal.util.*;

public final class ReflectiveMatcher implements ArgumentMatcher
{
   private final Object handlerObject;
   private Method handlerMethod;
   private Object matchedValue;

   public ReflectiveMatcher(Object handlerObject) { this.handlerObject = handlerObject; }

   public boolean matches(Object argValue)
   {
      if (handlerMethod == null) {
         handlerMethod = MethodReflection.findNonPrivateHandlerMethod(handlerObject);
      }

      matchedValue = argValue;
      Boolean result = MethodReflection.invoke(handlerObject, handlerMethod, argValue);

      return result == null || result;
   }

   public void writeMismatchPhrase(ArgumentMismatch argumentMismatch)
   {
      if (handlerMethod != null) {
         argumentMismatch.append(handlerMethod.getName()).append('(');
         argumentMismatch.appendFormatted(matchedValue);
         argumentMismatch.append(") (should return true, was false)");
      }
      else {
         argumentMismatch.append('?');
      }

      argumentMismatch.markAsFinished();
   }
}