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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
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.nio.CharBuffer;
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 compare method for the CharSequence 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 compare method by comparing StringBuilder objects with String
* objects.
*/
@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()) {
int result = CharSequence.compare(iSB.next(), iS.next());
Assert.assertTrue(result == 0, "Comparing item by item");
}
}
/**
* Verify comparison between two CharSequence implementations, including String,
* StringBuffer and StringBuilder.
*
* Note: CharBuffer states that "A char buffer is not comparable to any other type of object."
*/
@Test
public void testCompare() {
StringBuilder sb1 = generateTestBuilder(65, 70, 97, 102);
StringBuilder sb2 = generateTestBuilder(65, 70, 97, 102);
StringBuilder sb3 = generateTestBuilder(65, 71, 97, 103);
Assert.assertTrue(CharSequence.compare(sb1, sb2) == 0, "Compare between StringBuilders");
Assert.assertFalse(CharSequence.compare(sb1, sb3) == 0, "Compare between StringBuilders");
Assert.assertTrue(CharSequence.compare(sb1, sb2.toString()) == 0, "Compare between a StringBuilder and String");
Assert.assertFalse(CharSequence.compare(sb1, sb3.toString()) == 0, "Compare between a StringBuilder and String");
StringBuffer buf1 = generateTestBuffer(65, 70, 97, 102);
StringBuffer buf2 = generateTestBuffer(65, 70, 97, 102);
StringBuffer buf3 = generateTestBuffer(65, 71, 97, 103);
Assert.assertTrue(CharSequence.compare(buf1, buf2) == 0, "Compare between StringBuffers");
Assert.assertFalse(CharSequence.compare(buf1, buf3) == 0, "Compare between StringBuffers");
Assert.assertTrue(CharSequence.compare(sb1, buf2) == 0, "Compare between a StringBuilder and StringBuffer");
Assert.assertFalse(CharSequence.compare(sb1, buf3) == 0, "Compare between a StringBuilder and StringBuffer");
CharSequence cs1 = (CharSequence)buf1;
CharSequence cs2 = (CharSequence)sb1;
@SuppressWarnings("unchecked")
int result = ((Comparable<Object>)cs1).compareTo(buf2);
Assert.assertTrue(result == 0, "Compare between a StringBuilder and StringBuffer");
}
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 generateTestBuilder(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;
}
private static StringBuffer generateTestBuffer(int from1, int to1,
int from2, int to2) {
StringBuffer aBuffer = new StringBuffer(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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