1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
/*
* 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);
}
}
|
