1/*
2 * Copyright (c) 2015, 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.
8 *
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
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/*
25 * @test
26 * @summary Test custom id generators
27 * @build KullaTesting TestingInputStream
28 * @run testng IdGeneratorTest
29 */
30
31import java.io.ByteArrayOutputStream;
32import java.io.PrintStream;
33import java.util.List;
34import java.util.function.Supplier;
35
36import jdk.jshell.EvalException;
37import jdk.jshell.JShell;
38import jdk.jshell.SnippetEvent;
39import jdk.jshell.UnresolvedReferenceException;
40import jdk.jshell.VarSnippet;
41import org.testng.annotations.Test;
42
43import static org.testng.Assert.assertEquals;
44import static org.testng.Assert.assertTrue;
45
46@Test
47public class IdGeneratorTest {
48
49    public JShell.Builder getBuilder() {
50        TestingInputStream inStream = new TestingInputStream();
51        ByteArrayOutputStream outStream = new ByteArrayOutputStream();
52        ByteArrayOutputStream errStream = new ByteArrayOutputStream();
53        return JShell.builder()
54                .in(inStream)
55                .out(new PrintStream(outStream))
56                .err(new PrintStream(errStream));
57    }
58
59    public void testTempNameGenerator() {
60        JShell.Builder builder = getBuilder().tempVariableNameGenerator(new Supplier<String>() {
61            int count = 0;
62
63            @Override
64            public String get() {
65                return "temp" + ++count;
66            }
67        });
68        try (JShell jShell = builder.build()) {
69            for (int i = 0; i < 3; ++i) {
70                VarSnippet v = (VarSnippet) jShell.eval("2 + " + (i + 1)).get(0).snippet();
71                assertEquals("temp" + (i + 1), v.name(), "Custom id: ");
72            }
73        }
74    }
75
76    public void testResetTempNameGenerator() {
77        JShell.Builder builder = getBuilder().tempVariableNameGenerator(() -> {
78            throw new AssertionError("Should not be called");
79        });
80        try (JShell jShell = builder.tempVariableNameGenerator(null).build()) {
81            jShell.eval("2 + 2");
82        }
83    }
84
85    public void testIdGenerator() {
86        JShell.Builder builder = getBuilder().idGenerator(((snippet, id) -> "custom" + id));
87        try (JShell jShell = builder.build()) {
88            List<SnippetEvent> eval = jShell.eval("int a, b;");
89            checkIds(eval);
90            checkIds(jShell.drop(eval.get(0).snippet()));
91        }
92    }
93
94    private void checkIds(List<SnippetEvent> events) {
95        for (SnippetEvent event : events) {
96            assertTrue(event.snippet().id().startsWith("custom"), "Not started with \"custom\": "
97                    + event.snippet().id());
98        }
99    }
100
101    public void testIdInException() {
102        JShell.Builder builder = getBuilder().idGenerator(((snippet, id) -> "custom" + id));
103        try (JShell jShell = builder.build()) {
104            EvalException evalException = (EvalException) jShell.eval("throw new Error();").get(0).exception();
105            for (StackTraceElement ste : evalException.getStackTrace()) {
106                assertTrue(ste.getFileName().startsWith("#custom"), "Not started with \"#custom\": "
107                        + ste.getFileName());
108            }
109            jShell.eval("void f() { g(); }");
110            UnresolvedReferenceException unresolvedException = (UnresolvedReferenceException) jShell.eval("f();").get(0).exception();
111            for (StackTraceElement ste : unresolvedException.getStackTrace()) {
112                assertTrue(ste.getFileName().startsWith("#custom"), "Not started with \"#custom\": "
113                        + ste.getFileName());
114            }
115        }
116    }
117
118    public void testResetIdGenerator() {
119        JShell.Builder builder = getBuilder().idGenerator((sn, id) -> {
120            throw new AssertionError("Should not be called");
121        });
122        try (JShell jShell = builder.idGenerator(null).build()) {
123            jShell.eval("2 + 2");
124        }
125    }
126}
127