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* Copyright ( c ) 2018 , Oracle and / or its affiliates . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation .
*
* This code is distributed in the hope that it will be useful , but WITHOUT
* ANY WARRANTY ; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
* Please contact Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
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*/
import java.util.Iterator;
import java.util.Set;
import java.util.TreeSet;
import org.testng.Assert ;
import org.testng.annotations.Test;
/**
* @ test
* @ bug 8137326
* @ summary Test to verify the Comparable implementation for the StringBuilder class .
* @ run testng Comparison
*/
public class Comparison {
static char SEP = ':' ;
static String[][] books = {
{"Biography" , "Steve Jobs" },
{"Biography" , "Elon Musk: Tesla, SpaceX, and the Quest for a Fantastic Future" },
{"Law" , "Law 101: Everything You Need to Know About American Law, Fourth Edition" },
{"Law" , "The Tools of Argument: How the Best Lawyers Think, Argue, and Win" },
{"History" , "The History Book (Big Ideas Simply Explained)" },
{"History" , "A People's History of the United States" },
};
/**
* Verifies the Comparable implementation by comparing with two TreeSet that
* contain either StringBuilder or String .
*/
@Test
public void compareWithString() {
Set<StringBuilder> sbSet = constructSBSet();
Set<String> sSet = constructStringSet();
Iterator<StringBuilder> iSB = sbSet.iterator();
Iterator<String> iS = sSet.iterator();
while (iSB.hasNext()) {
String temp1 = iSB.next().toString();
System.out.println(temp1);
String temp2 = iS.next();
System.out.println(temp2);
Assert .assertTrue(temp1.equals(temp2), "Comparing item by item" );
}
}
/**
* Compares between StringBuilders
*/
@Test
public void testCompare() {
StringBuilder sb1 = generateTestBuffer(65 , 70 , 97 , 102 );
StringBuilder sb2 = generateTestBuffer(65 , 70 , 97 , 102 );
StringBuilder sb3 = generateTestBuffer(65 , 71 , 97 , 103 );
System.out.println(sb1.toString());
System.out.println(sb2.toString());
System.out.println(sb3.toString());
Assert .assertTrue(sb1.compareTo(sb2) == 0 , "Compare sb1 and sb2" );
Assert .assertFalse(sb1.compareTo(sb3) == 0 , "Compare sb1 and sb3" );
}
/**
* Verifies that the comparison is from index 0 to length ( ) - 1 of the two
* character sequences .
*/
@Test
public void testModifiedSequence() {
StringBuilder sb1 = generateTestBuffer(65 , 70 , 97 , 102 );
StringBuilder sb2 = generateTestBuffer(65 , 70 , 98 , 103 );
// contain different character sequences
Assert .assertFalse(sb1.compareTo(sb2) == 0 , "Compare the sequences before truncation" );
// the first 5 characters however are the same
sb1.setLength(5 );
sb2.setLength(5 );
System.out.println(sb1.toString());
System.out.println(sb2.toString());
Assert .assertTrue(sb1.compareTo(sb2) == 0 , "Compare sb1 and sb2" );
Assert .assertTrue(sb1.toString().compareTo(sb2.toString()) == 0 , "Compare strings of sb1 and sb2" );
}
private Set<String> constructStringSet() {
Set<String> sSet = new TreeSet<>();
for (String[] book : books) {
sSet.add(book[0 ] + SEP + book[1 ]);
}
return sSet;
}
private Set<StringBuilder> constructSBSet() {
Set<StringBuilder> sbSet = new TreeSet<>();
for (String[] book : books) {
sbSet.add(new StringBuilder(book[0 ]).append(SEP).append(book[1 ]));
}
return sbSet;
}
private static StringBuilder generateTestBuffer(int from1, int to1,
int from2, int to2) {
StringBuilder aBuffer = new StringBuilder(50 );
for (int i = from1; i < to1; i++) {
aBuffer.append((char )i);
}
for (int i = from2; i < to2; i++) {
aBuffer.append((char )i);
}
return aBuffer;
}
}
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