| /* |
| * 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(); |
| } |
| } |