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   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
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  package org.apache.cassandra.index.sai.analyzer.filter;
  
  import java.text.Normalizer;
  
  import org.junit.Test;
  
  import org.apache.cassandra.index.sai.SAITester;
  import org.apache.lucene.analysis.miscellaneous.ASCIIFoldingFilter;
  
  import static org.apache.cassandra.utils.LocalizeString.toLowerCaseLocalized;
  import static org.junit.Assert.assertEquals;
  
  public class BasicFiltersTest
  {
      @Test
      public void testLowerCase()
      {
          BasicFilters.LowerCase lowerCase = new BasicFilters.LowerCase();
          
          for (int count = 0; count < SAITester.getRandom().nextIntBetween(100, 1000); count++)
          {
              String actual = SAITester.getRandom().nextTextString(10, 50);
              assertEquals(toLowerCaseLocalized(actual), lowerCase.process(actual));
          }
      }
      
      @Test
      public void testNormalize()
      {
          BasicFilters.Normalize normalize = new BasicFilters.Normalize();
  
          for (int count = 0; count < SAITester.getRandom().nextIntBetween(100, 1000); count++)
          {
              String actual = SAITester.getRandom().nextTextString(10, 50);
              assertEquals(Normalizer.normalize(actual, Normalizer.Form.NFC), normalize.process(actual));
          }
      }
      
      @Test
      public void testAscii()
      {
          BasicFilters.Ascii ascii = new BasicFilters.Ascii();
  
          for (int count = 0; count < SAITester.getRandom().nextIntBetween(100, 1000); count++)
          {
              String actual = SAITester.getRandom().nextTextString(100, 5000);
  
              char[] actualChars = actual.toCharArray();
              char[] expectedChars = new char[actualChars.length * 4];
              int expectedSize = ASCIIFoldingFilter.foldToASCII(actualChars, 0, expectedChars, 0, actualChars.length);
              String expected = new String(expectedChars, 0, expectedSize);
  
              assertEquals(expected, ascii.process(actual));
          }
      }
  }
  