93 lines
3.3 KiB
Java
93 lines
3.3 KiB
Java
/*
|
|
* Copyright (c) 2015, 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.io.*;
|
|
import java.lang.reflect.Field;
|
|
|
|
import org.testng.annotations.BeforeClass;
|
|
import org.testng.annotations.DataProvider;
|
|
import org.testng.annotations.Test;
|
|
|
|
import static org.testng.Assert.*;
|
|
|
|
/*
|
|
* @test
|
|
* @bug 8077559
|
|
* @summary Tests Compact String. This one is testing
|
|
* if Compact String enable/disable VM Options is indeed working in String class,
|
|
* it's verified by testing if the VM option affect coder and
|
|
* COMPACT_STRINGS field in String class.
|
|
* @modules java.base/java.lang:open
|
|
* @run testng/othervm -XX:+CompactStrings -DCompactStringEnabled=true VMOptionsTest
|
|
* @run testng/othervm -XX:-CompactStrings -DCompactStringEnabled=false VMOptionsTest
|
|
*/
|
|
|
|
public class VMOptionsTest {
|
|
boolean compactStringEnabled;
|
|
// corresponding "COMPACT_STRINGS" field in String class.
|
|
Field COMPACT_STRINGS;
|
|
// corresponding "coder" field in String class.
|
|
Field coder;
|
|
|
|
// corresponding coder type in String class.
|
|
final byte LATIN1 = 0;
|
|
final byte UTF16 = 1;
|
|
|
|
@BeforeClass
|
|
public void setUp() throws Exception {
|
|
compactStringEnabled = Boolean.valueOf(System.getProperty("CompactStringEnabled", null));
|
|
COMPACT_STRINGS = String.class.getDeclaredField("COMPACT_STRINGS");
|
|
COMPACT_STRINGS.setAccessible(true);
|
|
coder = String.class.getDeclaredField("coder");
|
|
coder.setAccessible(true);
|
|
}
|
|
|
|
@DataProvider
|
|
public Object[][] provider() {
|
|
return new Object[][] {
|
|
new Object[] {"", LATIN1},
|
|
new Object[] {"abc", LATIN1},
|
|
new Object[] {"A\uff21", UTF16},
|
|
new Object[] {"\uff21\uff22", UTF16}
|
|
};
|
|
}
|
|
|
|
/*
|
|
* verify the coder field in String objects.
|
|
*/
|
|
@Test(dataProvider = "provider")
|
|
public void testCoder(String str, byte expected) throws Exception {
|
|
byte c = (byte) coder.get(str);
|
|
expected = compactStringEnabled ? expected : UTF16;
|
|
assertEquals(c, expected);
|
|
}
|
|
|
|
/*
|
|
* verify the COMPACT_STRINGS flag in String objects.
|
|
*/
|
|
@Test(dataProvider = "provider")
|
|
public void testCompactStringFlag(String str, byte ignore) throws Exception {
|
|
assertTrue(COMPACT_STRINGS.get(str).equals(compactStringEnabled));
|
|
}
|
|
}
|