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/*
* Copyright (c) 2014, 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.
*/
/* @test
* @summary unit tests for java.lang.invoke.LambdaForm
* @modules java.base/java.lang.invoke:open
* @run junit/othervm test.java.lang.invoke.LambdaFormTest
*/
package test.java.lang.invoke;
import org.junit.Test;
import java.lang.reflect.Method;
import static org.junit.Assert.*;
public class LambdaFormTest {
static final Method M_shortenSignature;
static {
try {
Class<?> impl = Class.forName("java.lang.invoke.LambdaForm", false, null);
Method m = impl.getDeclaredMethod("shortenSignature", String.class);
m.setAccessible(true);
M_shortenSignature = m;
} catch(Exception e) {
throw new AssertionError(e);
}
}
public static String shortenSignature(String signature) throws ReflectiveOperationException {
return (String)M_shortenSignature.invoke(null, signature);
}
@Test
public void testShortenSignature() throws ReflectiveOperationException {
for (String s : new String[] {
// invariant strings:
"L", "LL", "ILL", "LIL", "LLI", "IILL", "ILIL", "ILLI",
// a few mappings:
"LLL=L3", "LLLL=L4", "LLLLLLLLLL=L10",
"IIIDDD=I3D3", "IDDD=ID3", "IIDDD=IID3", "IIID=I3D", "IIIDD=I3DD"
}) {
String s2 = s.substring(s.indexOf('=')+1);
String s1 = s.equals(s2) ? s : s.substring(0, s.length() - s2.length() - 1);
// mix the above cases with before and after reps of Z*
for (int k = -3; k <= 3; k++) {
String beg = (k < 0 ? "ZZZZ".substring(-k) : "");
String end = (k > 0 ? "ZZZZ".substring(+k) : "");
String ks1 = beg+s1+end;
String ks2 = shortenSignature(beg)+s2+shortenSignature(end);
String ks3 = shortenSignature(ks1);
assertEquals(ks2, ks3);
}
}
}
public static void main(String[] args) throws ReflectiveOperationException {
LambdaFormTest test = new LambdaFormTest();
test.testShortenSignature();
}
}
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