jdk-24/jdk/test/java/util/Objects/BasicObjectsTest.java
2009-10-19 16:31:48 -07:00

156 lines
5.1 KiB
Java

/*
* Copyright 2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
/*
* @test
* @bug 6797535
* @summary Basic tests for methods in java.util.Objects
* @author Joseph D. Darcy
*/
import java.util.*;
public class BasicObjectsTest {
public static void main(String... args) {
int errors = 0;
errors += testEquals();
errors += testHashCode();
errors += testToString();
errors += testCompare();
errors += testNonNull();
if (errors > 0 )
throw new RuntimeException();
}
private static int testEquals() {
int errors = 0;
Object[] values = {null, "42", 42};
for(int i = 0; i < values.length; i++)
for(int j = 0; j < values.length; j++) {
boolean expected = (i == j);
Object a = values[i];
Object b = values[j];
boolean result = Objects.equals(a, b);
if (result != expected) {
errors++;
System.err.printf("When equating %s to %s, got %b instead of %b%n.",
a, b, result, expected);
}
}
return errors;
}
private static int testHashCode() {
int errors = 0;
errors += (Objects.hashCode(null) == 0 ) ? 0 : 1;
String s = "42";
errors += (Objects.hashCode(s) == s.hashCode() ) ? 0 : 1;
return errors;
}
private static int testToString() {
int errors = 0;
errors += ("null".equals(Objects.toString(null)) ) ? 0 : 1;
String s = "Some string";
errors += (s.equals(Objects.toString(s)) ) ? 0 : 1;
return errors;
}
private static int testCompare() {
int errors = 0;
String[] values = {"e. e. cummings", "zzz"};
String[] VALUES = {"E. E. Cummings", "ZZZ"};
errors += compareTest(null, null, 0);
for(int i = 0; i < values.length; i++) {
String a = values[i];
errors += compareTest(a, a, 0);
for(int j = 0; j < VALUES.length; j++) {
int expected = Integer.compare(i, j);
String b = VALUES[j];
errors += compareTest(a, b, expected);
}
}
return errors;
}
private static int compareTest(String a, String b, int expected) {
int errors = 0;
int result = Objects.compare(a, b, String.CASE_INSENSITIVE_ORDER);
if (Integer.signum(result) != Integer.signum(expected)) {
errors++;
System.err.printf("When comparing %s to %s, got %d instead of %d%n.",
a, b, result, expected);
}
return errors;
}
private static int testNonNull() {
int errors = 0;
String s;
// Test 1-arg variant
try {
s = Objects.nonNull("pants");
if (s != "pants") {
System.err.printf("1-arg non-null failed to return its arg");
errors++;
}
} catch (NullPointerException e) {
System.err.printf("1-arg nonNull threw unexpected NPE");
errors++;
}
try {
s = Objects.nonNull(null);
System.err.printf("1-arg nonNull failed to throw NPE");
errors++;
} catch (NullPointerException e) {
// Expected
}
// Test 2-arg variant
try {
s = Objects.nonNull("pants", "trousers");
if (s != "pants") {
System.err.printf("2-arg nonNull failed to return its arg");
errors++;
}
} catch (NullPointerException e) {
System.err.printf("2-arg nonNull threw unexpected NPE");
errors++;
}
try {
s = Objects.nonNull(null, "pantaloons");
System.err.printf("2-arg nonNull failed to throw NPE");
errors++;
} catch (NullPointerException e) {
if (e.getMessage() != "pantaloons") {
System.err.printf("2-arg nonNull threw NPE w/ bad detail msg");
errors++;
}
}
return errors;
}
}