1 /*
2 * Copyright (c) 2024, 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
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7 * published by the Free Software Foundation.
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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
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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22 */
23
24 /*
25 * @test
26 * @summary Smoke test for captured values in quotable lambdas.
27 * @modules jdk.incubator.code
28 * @run testng TestCaptureQuotable
29 */
30
31 import org.testng.annotations.*;
32
33 import jdk.incubator.code.dialect.core.CoreOp.Var;
34 import jdk.incubator.code.Op;
35 import jdk.incubator.code.Quotable;
36 import jdk.incubator.code.Quoted;
37 import jdk.incubator.code.interpreter.Interpreter;
38 import java.lang.invoke.MethodHandles;
39 import java.util.ArrayList;
40 import java.util.Iterator;
41 import java.util.List;
42 import java.util.function.IntSupplier;
43 import java.util.function.IntUnaryOperator;
44 import java.util.function.ToIntFunction;
45 import java.util.stream.IntStream;
46
47 import static org.testng.Assert.*;
48
49 public class TestCaptureQuotable {
50
51 @Test(dataProvider = "ints")
52 public void testCaptureIntParam(int x) {
53 Quotable quotable = (Quotable & IntUnaryOperator)y -> x + y;
54 Quoted quoted = Op.ofQuotable(quotable).get();
55 assertEquals(quoted.capturedValues().size(), 1);
56 assertEquals(((Var)quoted.capturedValues().values().iterator().next()).value(), x);
57 List<Object> arguments = new ArrayList<>();
58 arguments.add(1);
59 arguments.addAll(quoted.capturedValues().values());
60 int res = (int)Interpreter.invoke(MethodHandles.lookup(), (Op & Op.Invokable) quoted.op(),
61 arguments);
62 assertEquals(res, x + 1);
63 }
64
65 @Test
66 public void testCaptureThisRefAndIntConstant() {
67 final int x = 100;
68 String hello = "hello";
69 Quotable quotable = (Quotable & ToIntFunction<Number>)y -> y.intValue() + hashCode() + hello.length() + x;
70 Quoted quoted = Op.ofQuotable(quotable).get();
71 assertEquals(quoted.capturedValues().size(), 3);
72 Iterator<Object> it = quoted.capturedValues().values().iterator();
73 assertEquals(it.next(), this);
74 assertEquals(((Var)it.next()).value(), hello);
75 assertEquals(((Var)it.next()).value(), x);
76 List<Object> arguments = new ArrayList<>();
77 arguments.add(1);
78 arguments.addAll(quoted.capturedValues().values());
79 int res = (int)Interpreter.invoke(MethodHandles.lookup(), (Op & Op.Invokable) quoted.op(),
80 arguments);
81 assertEquals(res, x + 1 + hashCode() + hello.length());
82 }
83
84 @Test
85 public void testCaptureThisInInvocationArg() {
86 Quotable quotable = (Quotable & ToIntFunction<Number>)y -> y.intValue() + Integer.valueOf(hashCode());
87 Quoted quoted = Op.ofQuotable(quotable).get();
88 assertEquals(quoted.capturedValues().size(), 1);
89 Iterator<Object> it = quoted.capturedValues().values().iterator();
90 assertEquals(it.next(), this);
91 List<Object> arguments = new ArrayList<>();
92 arguments.add(1);
93 arguments.addAll(quoted.capturedValues().values());
94 int res = (int)Interpreter.invoke(MethodHandles.lookup(), (Op & Op.Invokable) quoted.op(),
95 arguments);
96 assertEquals(res, 1 + hashCode());
97 }
98
99 record R(int i) {}
100
101 @Test
102 public void testCaptureThisInNewArg() {
103 Quotable quotable = (Quotable & ToIntFunction<Number>)y -> y.intValue() + new R(hashCode()).i;
104 Quoted quoted = Op.ofQuotable(quotable).get();
105 assertEquals(quoted.capturedValues().size(), 1);
106 Iterator<Object> it = quoted.capturedValues().values().iterator();
107 assertEquals(it.next(), this);
108 List<Object> arguments = new ArrayList<>();
109 arguments.add(1);
110 arguments.addAll(quoted.capturedValues().values());
111 int res = (int)Interpreter.invoke(MethodHandles.lookup(), (Op & Op.Invokable) quoted.op(),
112 arguments);
113 assertEquals(res, 1 + hashCode());
114 }
115
116 @Test
117 public void testCaptureMany() {
118 int[] ia = new int[8];
119 int i1 = ia[0] = 0;
120 int i2 = ia[1] = 1;
121 int i3 = ia[2] = 2;
122 int i4 = ia[3] = 3;
123 int i5 = ia[4] = 4;
124 int i6 = ia[5] = 5;
125 int i7 = ia[6] = 6;
126 int i8 = ia[7] = 7;
127
128 Quotable quotable = (Quotable & IntSupplier) () -> i1 + i2 + i3 + i4 + i5 + i6 + i7 + i8;
129 Quoted quoted = Op.ofQuotable(quotable).get();
130 assertEquals(quoted.capturedValues().size(), ia.length);
131 assertEquals(quoted.op().capturedValues(), new ArrayList<>(quoted.capturedValues().keySet()));
132 Iterator<Object> it = quoted.capturedValues().values().iterator();
133 int i = 0;
134 while (it.hasNext()) {
135 int actual = (int) ((Var)it.next()).value();
136 assertEquals(actual, ia[i++]);
137 }
138 }
139
140 static class Context {
141 final int x;
142
143 Context(int x) {
144 this.x = x;
145 }
146
147 Quotable quotable() {
148 return (Quotable & IntUnaryOperator) y -> x + y;
149 }
150 }
151
152 @Test(dataProvider = "ints")
153 public void testCaptureIntField(int x) {
154 Context context = new Context(x);
155 Quotable quotable = context.quotable();
156 Quoted quoted = Op.ofQuotable(quotable).get();
157 assertEquals(quoted.capturedValues().size(), 1);
158 assertEquals(quoted.capturedValues().values().iterator().next(), context);
159 List<Object> arguments = new ArrayList<>();
160 arguments.add(1);
161 arguments.addAll(quoted.capturedValues().values());
162 int res = (int)Interpreter.invoke(MethodHandles.lookup(), (Op & Op.Invokable) quoted.op(),
163 arguments);
164 assertEquals(res, x + 1);
165 }
166
167 @DataProvider(name = "ints")
168 public Object[][] ints() {
169 return IntStream.range(0, 50)
170 .mapToObj(i -> new Object[] { i })
171 .toArray(Object[][]::new);
172 }
173
174 @Test(dataProvider = "ints")
175 public void testCaptureReferenceReceiver(int i) {
176 int prevCount = Box.count;
177 Quotable quotable = (Quotable & IntUnaryOperator)new Box(i)::add;
178 Quoted quoted = Op.ofQuotable(quotable).get();
179 assertEquals(Box.count, prevCount + 1); // no duplicate receiver computation!
180 assertEquals(quoted.capturedValues().size(), 1);
181 assertEquals(((Box)((Var)quoted.capturedValues().values().iterator().next()).value()).i, i);
182 List<Object> arguments = new ArrayList<>();
183 arguments.add(1);
184 arguments.addAll(quoted.capturedValues().values());
185 int res = (int)Interpreter.invoke(MethodHandles.lookup(), (Op & Op.Invokable) quoted.op(),
186 arguments);
187 assertEquals(res, i + 1);
188 }
189
190 record Box(int i) {
191
192 static int count = 0;
193
194 Box {
195 count++; // keep track of side-effects
196 }
197
198 int add(int i) {
199 return i + this.i;
200 }
201 }
202 }