1 /* 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* @test 25 * @summary unit tests for java.lang.invoke.LambdaForm 26 * @run junit/othervm test.java.lang.invoke.LambdaFormTest 27 */ 28 package test.java.lang.invoke; 29 30 import org.junit.Test; 31 import java.lang.reflect.Method; 32 import static org.junit.Assert.*; 33 34 public class LambdaFormTest { 35 static final Method M_shortenSignature; 36 static { 37 try { 38 Class<?> impl = Class.forName("java.lang.invoke.LambdaForm", false, null); 39 Method m = impl.getDeclaredMethod("shortenSignature", String.class); 40 m.setAccessible(true); 41 M_shortenSignature = m; 42 } catch(Exception e) { 43 throw new AssertionError(e); 44 } 45 } 46 47 public static String shortenSignature(String signature) throws ReflectiveOperationException { 48 return (String)M_shortenSignature.invoke(null, signature); 49 } 50 51 @Test 52 public void testShortenSignature() throws ReflectiveOperationException { 53 for (String s : new String[] { 54 // invariant strings: 55 "L", "LL", "ILL", "LIL", "LLI", "IILL", "ILIL", "ILLI", 56 // a few mappings: 57 "LLL=L3", "LLLL=L4", "LLLLLLLLLL=L10", 58 "IIIDDD=I3D3", "IDDD=ID3", "IIDDD=IID3", "IIID=I3D", "IIIDD=I3DD" 59 }) { 60 String s2 = s.substring(s.indexOf('=')+1); 61 String s1 = s.equals(s2) ? s : s.substring(0, s.length() - s2.length() - 1); 62 // mix the above cases with before and after reps of Z* 63 for (int k = -3; k <= 3; k++) { 64 String beg = (k < 0 ? "ZZZZ".substring(-k) : ""); 65 String end = (k > 0 ? "ZZZZ".substring(+k) : ""); 66 String ks1 = beg+s1+end; 67 String ks2 = shortenSignature(beg)+s2+shortenSignature(end); 68 String ks3 = shortenSignature(ks1); 69 assertEquals(ks2, ks3); 70 } 71 } 72 } 73 74 public static void main(String[] args) throws ReflectiveOperationException { 75 LambdaFormTest test = new LambdaFormTest(); 76 test.testShortenSignature(); 77 } 78 }