| /* |
| * 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 |
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| * 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). |
| * |
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| */ |
| |
| /* @test |
| * @bug 8158169 |
| * @summary unit tests for java.lang.invoke.MethodHandles |
| * @run testng test.java.lang.invoke.DropArgumentsTest |
| */ |
| package test.java.lang.invoke; |
| |
| import java.lang.invoke.MethodHandle; |
| import java.lang.invoke.MethodHandles; |
| import java.lang.invoke.MethodType; |
| import java.util.Collections; |
| 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 DropArgumentsTest { |
| |
| @Test |
| public void testDropArgumentsToMatch() throws Throwable { |
| MethodHandle cat = lookup().findVirtual(String.class, "concat", methodType(String.class, String.class)); |
| MethodType bigType = cat.type().insertParameterTypes(0, String.class, String.class, int.class); |
| MethodHandle d0 = MethodHandles.dropArgumentsToMatch(cat, 0, bigType.parameterList(), 3); |
| assertEquals("xy",(String)d0.invokeExact("m", "n", 1, "x", "y")); |
| MethodHandle d1 = MethodHandles.dropArgumentsToMatch(cat, 0, bigType.parameterList(), 0); |
| assertEquals("mn",(String)d1.invokeExact("m", "n", 1, "x", "y")); |
| MethodHandle d2 = MethodHandles.dropArgumentsToMatch(cat, 1, bigType.parameterList(), 4); |
| assertEquals("xy",(String)d2.invokeExact("x", "b", "c", 1, "a", "y")); |
| |
| } |
| |
| @DataProvider(name = "dropArgumentsToMatchNPEData") |
| private Object[][] dropArgumentsToMatchNPEData() |
| throws NoSuchMethodException, IllegalAccessException { |
| MethodHandle cat = lookup().findVirtual(String.class, "concat", methodType(String.class, String.class)); |
| return new Object[][] { |
| { (MethodHandle) null, 0, cat.type().parameterList(), 0 }, |
| { cat, 0, null, 0 } |
| }; |
| } |
| |
| @Test(dataProvider = "dropArgumentsToMatchNPEData") |
| @ExpectedExceptions(NullPointerException.class) |
| public void dropArgumentsToMatchNPE(MethodHandle target, int pos, List<Class<?>> valueType, int skip) { |
| MethodHandles.dropArgumentsToMatch(target, pos, valueType , skip); |
| } |
| |
| @DataProvider(name = "dropArgumentsToMatchIAEData") |
| private Object[][] dropArgumentsToMatchIAEData() |
| throws NoSuchMethodException, IllegalAccessException { |
| MethodHandle cat = lookup().findVirtual(String.class, "concat", methodType(String.class, String.class)); |
| MethodType bigType = cat.type().insertParameterTypes(0, String.class, String.class, int.class); |
| return new Object[][] { |
| {cat, -1, bigType.parameterList(), 0}, |
| {cat, 0, bigType.parameterList(), -1}, |
| {cat, 3, bigType.parameterList(), 0}, |
| {cat, 0, bigType.parameterList(), 6}, |
| {cat, 0, bigType.parameterList(), 2} |
| }; |
| } |
| |
| @Test(dataProvider = "dropArgumentsToMatchIAEData") |
| @ExpectedExceptions(IllegalArgumentException.class) |
| public void dropArgumentsToMatchIAE(MethodHandle target, int pos, List<Class<?>> valueType, int skip) { |
| MethodHandles.dropArgumentsToMatch(target, pos, valueType , skip); |
| } |
| |
| @Test |
| @ExpectedExceptions(IllegalArgumentException.class) |
| public void dropArgumentsToMatchTestWithVoid() throws Throwable { |
| MethodHandle cat = lookup().findVirtual(String.class, "concat", |
| MethodType.methodType(String.class, String.class)); |
| MethodType bigTypewithVoid = cat.type().insertParameterTypes(0, void.class, String.class, int.class); |
| MethodHandle handle2 = MethodHandles.dropArgumentsToMatch(cat, 0, bigTypewithVoid.parameterList(), 1); |
| } |
| |
| public static class MethodSet { |
| |
| static void mVoid() { |
| |
| } |
| |
| static void mVoid(int t) { |
| |
| } |
| } |
| |
| @Test |
| public void dropArgumentsToMatchPosSkipRange() throws Throwable { |
| // newTypes.size() == 1, pos == 1 && target.paramSize() == 0, skip == 0 |
| MethodHandle mh1 = MethodHandles.lookup().findStatic(MethodSet.class, "mVoid", |
| MethodType.methodType(void.class)); |
| MethodHandle handle1 = dropArgumentsToMatch(mh1, 0, Collections.singletonList(int.class), 1); |
| assertEquals(1, handle1.type().parameterList().size()); |
| |
| // newTypes.size() == 1, pos == 0 && target.paramSize() == 1, skip == 1 |
| MethodHandle mh2 = MethodHandles.lookup().findStatic(MethodSet.class, "mVoid", |
| MethodType.methodType(void.class, int.class)); |
| MethodHandle handle2 = dropArgumentsToMatch(mh2, 1, Collections.singletonList(int.class), 0); |
| assertEquals(2, handle2.type().parameterList().size()); |
| } |
| } |