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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.util.regex.*;

public final class PatternMatcher implements ArgumentMatcher
{
   private final Pattern pattern;

   public PatternMatcher(String regex) { pattern = Pattern.compile(regex); }

   public boolean matches(Object argValue)
   {
      return pattern.matcher((CharSequence) argValue).matches();
   }

   public void writeMismatchPhrase(ArgumentMismatch argumentMismatch)
   {
      argumentMismatch.append("a string matching \"").append(pattern.toString()).append('"');
   }
}