1 /* 2 * Copyright (c) 2016, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 /* @test 27 * @summary unit tests for java.lang.invoke.MethodHandles 28 * @run testng/othervm -ea -esa test.java.lang.invoke.VarArgsTest 29 */ 30 package test.java.lang.invoke; 31 32 import java.lang.invoke.MethodHandle; 33 import java.lang.invoke.MethodHandles; 34 import java.lang.invoke.MethodType; 35 import java.util.Arrays; 36 import java.util.List; 37 import static java.lang.invoke.MethodHandles.*; 38 import static java.lang.invoke.MethodType.*; 39 import static org.testng.AssertJUnit.*; 40 import org.testng.annotations.*; 41 42 public class VarArgsTest { 43 44 @Test testWithVarargs()45 public void testWithVarargs() throws Throwable { 46 MethodHandle deepToString = publicLookup() 47 .findStatic(Arrays.class, "deepToString", methodType(String.class, Object[].class)); 48 assertFalse(deepToString.isVarargsCollector()); 49 MethodHandle ts = deepToString.withVarargs(false); 50 assertFalse(ts.isVarargsCollector()); 51 MethodHandle ts1 = deepToString.withVarargs(true); 52 assertTrue(ts1.isVarargsCollector()); 53 assertEquals("[won]", (String) ts1.invokeExact(new Object[]{"won"})); 54 assertEquals("[won]", (String) ts1.invoke(new Object[]{"won"})); 55 assertEquals("[won]", (String) ts1.invoke("won")); 56 assertEquals("[won, won]", (String) ts1.invoke("won", "won")); 57 assertEquals("[won, won]", (String) ts1.invoke(new Object[]{"won", "won"})); 58 assertEquals("[[won]]", (String) ts1.invoke((Object) new Object[]{"won"})); 59 } 60 61 @Test testWithVarargs2()62 public void testWithVarargs2() throws Throwable { 63 MethodHandle asList = publicLookup() 64 .findStatic(Arrays.class, "asList", methodType(List.class, Object[].class)); 65 MethodHandle asListWithVarargs = asList.withVarargs(asList.isVarargsCollector()); 66 assert(asListWithVarargs.isVarargsCollector()); 67 assertEquals("[]", asListWithVarargs.invoke().toString()); 68 assertEquals("[1]", asListWithVarargs.invoke(1).toString()); 69 assertEquals("[two, too]", asListWithVarargs.invoke("two", "too").toString()); 70 } 71 72 @Test 73 @ExpectedExceptions(IllegalArgumentException.class) testWithVarargsIAE()74 public void testWithVarargsIAE() throws Throwable { 75 MethodHandle lenMH = publicLookup() 76 .findVirtual(String.class, "length", methodType(int.class)); 77 MethodHandle lenMHWithVarargs = lenMH.withVarargs(true); 78 } 79 80 } 81