/*
    * Copyright 2007-2015 Kasper B. Graversen
    * 
    * Licensed 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.supercsv.datacreators;
  
  import java.io.FileWriter;
  import java.io.IOException;
  
  import org.junit.Ignore;
  import org.junit.Test;
  import org.supercsv.io.CsvListWriter;
  import org.supercsv.prefs.CsvPreference;
  
  /** Create data for performance tests */
  public class SparseDataCreator {
  
  	@Ignore("This is a test only for convenience")
  	@Test
  	public void CreateSparseNumericData() throws IOException
  	{
  		FileWriter f = new FileWriter("SparseNumbersOnly.csv"); 
  		CsvListWriter ff = new CsvListWriter(f, CsvPreference.STANDARD_PREFERENCE);
  		
  		final int rowsToProduce = 1000000;
  		int j = 33;
  		for(int i = 0; i < rowsToProduce; i++)
  		{
  			if(j == 0) j = 2;
  			ff.write(i, i*j, i/(double)j);
  			j = i*j % 1843;
  		}
  		ff.close();
  	}
  }