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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.argumentMatching;

import java.util.regex.*;

import org.jetbrains.annotations.*;

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

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

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

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