| /* |
| * Copyright (c) 2016, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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.MethodHandles |
| * @run testng/othervm -ea -esa test.java.lang.invoke.VarArgsTest |
| */ |
| package test.java.lang.invoke; |
| |
| import java.lang.invoke.MethodHandle; |
| import java.lang.invoke.MethodHandles; |
| import java.lang.invoke.MethodType; |
| import java.util.Arrays; |
| import java.util.List; |
| import static java.lang.invoke.MethodHandles.*; |
| import static java.lang.invoke.MethodType.*; |
| import static org.testng.AssertJUnit.*; |
| import org.testng.annotations.*; |
| |
| public class VarArgsTest { |
| |
| @Test |
| public void testWithVarargs() throws Throwable { |
| MethodHandle deepToString = publicLookup() |
| .findStatic(Arrays.class, "deepToString", methodType(String.class, Object[].class)); |
| assertFalse(deepToString.isVarargsCollector()); |
| MethodHandle ts = deepToString.withVarargs(false); |
| assertFalse(ts.isVarargsCollector()); |
| MethodHandle ts1 = deepToString.withVarargs(true); |
| assertTrue(ts1.isVarargsCollector()); |
| assertEquals("[won]", (String) ts1.invokeExact(new Object[]{"won"})); |
| assertEquals("[won]", (String) ts1.invoke(new Object[]{"won"})); |
| assertEquals("[won]", (String) ts1.invoke("won")); |
| assertEquals("[won, won]", (String) ts1.invoke("won", "won")); |
| assertEquals("[won, won]", (String) ts1.invoke(new Object[]{"won", "won"})); |
| assertEquals("[[won]]", (String) ts1.invoke((Object) new Object[]{"won"})); |
| } |
| |
| @Test |
| public void testWithVarargs2() throws Throwable { |
| MethodHandle asList = publicLookup() |
| .findStatic(Arrays.class, "asList", methodType(List.class, Object[].class)); |
| MethodHandle asListWithVarargs = asList.withVarargs(asList.isVarargsCollector()); |
| assert(asListWithVarargs.isVarargsCollector()); |
| assertEquals("[]", asListWithVarargs.invoke().toString()); |
| assertEquals("[1]", asListWithVarargs.invoke(1).toString()); |
| assertEquals("[two, too]", asListWithVarargs.invoke("two", "too").toString()); |
| } |
| |
| @Test |
| @ExpectedExceptions(IllegalArgumentException.class) |
| public void testWithVarargsIAE() throws Throwable { |
| MethodHandle lenMH = publicLookup() |
| .findVirtual(String.class, "length", methodType(int.class)); |
| MethodHandle lenMHWithVarargs = lenMH.withVarargs(true); |
| } |
| |
| } |