TestTextPairWritable.java

/**
 * Copyright [2011] [Datasalt Systems S.L.]
 *
 * 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 com.datasalt.utils.io;

import static org.junit.Assert.assertTrue;

import java.io.IOException;


import org.junit.Test;

import com.datasalt.utils.commons.WritableUtils;
import com.datasalt.utils.io.TextPairWritable;

public class TestTextPairWritable {

	public static final String LARGE_STRING_1="abcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcab1";
	public static final String LARGE_STRING_2="abcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcab2";
	
	@Test
	public void testComparator(){
		
		TextPairWritable t1 = new TextPairWritable();
		TextPairWritable t2 = new TextPairWritable();
		
		t1.setFirst(LARGE_STRING_1);
		t2.setFirst(LARGE_STRING_1);
		t1.setSecond(LARGE_STRING_1);
		t2.setSecond(LARGE_STRING_1);
		TextPairWritable.Comparator comparator = new TextPairWritable.Comparator();
		assertTrue(comparator.compare(t1,t2) == 0);
		
		t2.setSecond(LARGE_STRING_2);
		assertTrue(comparator.compare(t1,t2) < 0);
		
		t2.setSecond(LARGE_STRING_1);
		t1.setSecond(LARGE_STRING_2);
		assertTrue(comparator.compare(t1,t2) > 0);
		
		t1.setFirst(LARGE_STRING_1);
		t2.setFirst(LARGE_STRING_2);
		assertTrue(comparator.compare(t1, t2) < 0);
		
		t1.setFirst(LARGE_STRING_2);
		t2.setFirst(LARGE_STRING_1);
		assertTrue(comparator.compare(t1, t2) > 0);
		
	}
	
	public void testBinaryComparator() throws IOException{
		TextPairWritable t1 = new TextPairWritable();
		TextPairWritable t2 = new TextPairWritable();
		
		t1.setFirst(LARGE_STRING_1);
		t2.setFirst(LARGE_STRING_1);
		t1.setSecond(LARGE_STRING_1);
		t2.setSecond(LARGE_STRING_1);
		TextPairWritable.Comparator comparator = new TextPairWritable.Comparator();
		
    byte[] array1 = WritableUtils.serialize(t1);
    byte[] array2 = WritableUtils.serialize(t2);
    
    assertTrue(comparator.compare(array1,0,array1.length, array2,0,array2.length) == 0);
    
    t1.setSecond(LARGE_STRING_2);
    array1 = WritableUtils.serialize(t1);
    array2 = WritableUtils.serialize(t2);
    assertTrue(comparator.compare(array1,0,array1.length, array2,0,array2.length) > 0);
    
    t1.setSecond(LARGE_STRING_1);
    t2.setSecond(LARGE_STRING_2);
    array1 = WritableUtils.serialize(t1);
    array2 = WritableUtils.serialize(t2);
    assertTrue(comparator.compare(array1,0,array1.length, array2,0,array2.length) < 0);
    
	}
	
	public void testSubstringComparator() throws IOException{
		TextPairWritable t1 = new TextPairWritable();
		TextPairWritable t2 = new TextPairWritable();
		
		t1.setFirst(LARGE_STRING_1);
		t2.setFirst(LARGE_STRING_1);
		t1.setSecond(LARGE_STRING_1);
		t2.setSecond(LARGE_STRING_1);
		TextPairWritable.FirstStringComparator comparator = new TextPairWritable.FirstStringComparator();
		
    byte[] array1 = WritableUtils.serialize(t1);
    byte[] array2 = WritableUtils.serialize(t2);
    
    assertTrue(comparator.compare(array1,0,array1.length, array2,0,array2.length) == 0);
    
    t1.setSecond(LARGE_STRING_2);
    array1 = WritableUtils.serialize(t1);
    array2 = WritableUtils.serialize(t2);
    assertTrue(comparator.compare(array1,0,array1.length, array2,0,array2.length) == 0);
    
    t1.setSecond(LARGE_STRING_1);
    t2.setSecond(LARGE_STRING_2);
    array1 = WritableUtils.serialize(t1);
    array2 = WritableUtils.serialize(t2);
    assertTrue(comparator.compare(array1,0,array1.length, array2,0,array2.length) == 0);
    
    t1.setFirst(LARGE_STRING_2);
    array1 = WritableUtils.serialize(t1);
    array2 = WritableUtils.serialize(t2);
    assertTrue(comparator.compare(array1,0,array1.length, array2,0,array2.length) > 0);
    
    
    
	}
	
	
}