content: /*
   * 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
   * limitations under the License.
   */
  
  package org.apache.carbondata.core.localdictionary;
  
  import java.nio.ByteBuffer;
  import java.util.Arrays;
  
  import org.apache.carbondata.core.constants.CarbonCommonConstants;
  import org.apache.carbondata.core.localdictionary.exception.DictionaryThresholdReachedException;
  import org.apache.carbondata.core.localdictionary.generator.ColumnLocalDictionaryGenerator;
  import org.apache.carbondata.core.localdictionary.generator.LocalDictionaryGenerator;
  
  import org.junit.Assert;
  import org.junit.Test;
  
  public class TestLocalDictionaryGenerator {
  
    @Test
    public void testColumnLocalDictionaryGeneratorWithValidDataWithinThreshold() {
      LocalDictionaryGenerator generator = new ColumnLocalDictionaryGenerator(1000, 2);
      try {
        for (int i = 1; i <= 1000; i++) {
          generator.generateDictionary(("" + i).getBytes());
        }
        Assert.assertTrue(true);
      } catch (Exception e) {
        Assert.assertTrue(false);
      }
  
      int dictionaryValue = 2;
      for (int i = 1; i <= 1000; i++) {
        byte[] dictionaryKeyBasedOnValue = generator.getDictionaryKeyBasedOnValue(dictionaryValue);
        Assert
            .assertTrue(Arrays.equals(dictionaryKeyBasedOnValue, ("" + i).getBytes()));
        dictionaryValue++;
      }
    }
  
    @Test
    public void testColumnLocalDictionaryGeneratorWhenThresholdReached_ExceptionShouldBeThrown() {
      LocalDictionaryGenerator generator = new ColumnLocalDictionaryGenerator(1000, 2);
      try {
        for (int i = 1; i <= 10000; i++) {
          generator.generateDictionary(("" + i).getBytes());
        }
        Assert.assertTrue(false);
      } catch (DictionaryThresholdReachedException e) {
        Assert.assertTrue(true);
      }
      Assert.assertTrue(generator.isThresholdReached());
    }
  
    @Test
    public void testColumnLocalDictionaryGeneratorForNullValueIsPresentWithoutAddingAnyData() {
      LocalDictionaryGenerator generator = new ColumnLocalDictionaryGenerator(1000, 2);
      ByteBuffer byteBuffer = ByteBuffer.allocate(
          2 + CarbonCommonConstants.MEMBER_DEFAULT_VAL_ARRAY.length);
      byteBuffer.putShort((short)CarbonCommonConstants.MEMBER_DEFAULT_VAL_ARRAY.length);
      byteBuffer.put(CarbonCommonConstants.MEMBER_DEFAULT_VAL_ARRAY);
  
      Assert.assertTrue(Arrays.equals(generator.getDictionaryKeyBasedOnValue(1),
          byteBuffer.array()));
    }
  }
  