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 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at
 * trunk/opends/resource/legal-notices/OpenDS.LICENSE
 * or https://OpenDS.dev.java.net/OpenDS.LICENSE.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at
 * trunk/opends/resource/legal-notices/OpenDS.LICENSE.  If applicable,
 * add the following below this CDDL HEADER, with the fields enclosed
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 *      Copyright 2008-2009 Sun Microsystems, Inc.
 */

package org.opends.messages;

import org.opends.server.TestCaseUtils;
import org.opends.server.util.StaticUtils;

import static org.testng.Assert.*;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;

import java.io.File;
import java.io.FilenameFilter;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import java.util.HashSet;

/**
 * Category Tester.
 *
 */
public class PropertiesFilesTest extends MessagesTestCase {

  /**
   * Creates date for testForDuplicateKeys.
   * @return The test data.
   */
  @DataProvider(name = "messagePropertiesFiles")
  public Object[][] getMessagePropertiesFiles() {
    File propFilesDir = getPropertiesFilesDirectory();
    assertTrue(propFilesDir.exists(), "Directory " +
            propFilesDir.getAbsolutePath() + " does not exist");
    File[] fileList = propFilesDir.listFiles(new FilenameFilter() {
      public boolean accept(File dir, String name) {
        return name.endsWith(".properties");
      }
    });
    Object[][] propFiles = new Object[fileList.length][1];
    for (int i = 0; i < propFiles.length; i++) {
      propFiles[i] = new Object[] { fileList[i] };
    }
    return propFiles;
  }

  /**
   * Tests that a properties file does not have duplicate keys.  This
   * is not enforced by GenerateMessageFile because it uses
   * java.util.Properties to load and process the files which ignores
   * duplicate keys.
   *
   * @param propertiesFile file
   * @throws IOException if problems reading the file
   */
  @Test(dataProvider = "messagePropertiesFiles")
  public void testForDuplicateKeys(File propertiesFile)
      throws IOException
  {
    Set<String> keys = new HashSet<String>();
    BufferedReader reader =
        new BufferedReader(new FileReader(propertiesFile));
    List<String> errors = new LinkedList<String>();

    String prevLine = null;
    String line;
    while (null != (line = reader.readLine()))
    {
      if (!(prevLine == null || prevLine.endsWith("\\")) // not a value continuation
          && !(line.startsWith("#")) // not a comment
          && (line.indexOf('=') > 0))
      {
        // defines a key
        String key = line.substring(0, line.indexOf('='));
        if (keys.contains(key))
        {
          errors.add(key);
        }
        else
        {
          keys.add(key);
        }
      }
      prevLine = line;
    }

    assertTrue(errors.isEmpty(),
        "The following keys are defined multiple times in "
            + propertiesFile.getName() + ":" + EOL
            + StaticUtils.listToString(errors, EOL));
  }

  private File getPropertiesFilesDirectory() {
    String buildRoot = System.getProperty(TestCaseUtils.PROPERTY_BUILD_ROOT);
    return new File(buildRoot,
            "src" + File.separator +
            "messages" + File.separator +
            "messages");
  }

}