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
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22  */
23 
24 /*
25  * @test
26  * @summary Test custom id generators
27  * @build KullaTesting TestingInputStream
28  * @run testng IdGeneratorTest
29  */
30 
31 import java.io.ByteArrayOutputStream;
32 import java.io.PrintStream;
33 import java.util.List;
34 import java.util.function.Supplier;
35 
36 import jdk.jshell.EvalException;
37 import jdk.jshell.JShell;
38 import jdk.jshell.SnippetEvent;
39 import jdk.jshell.UnresolvedReferenceException;
40 import jdk.jshell.VarSnippet;
41 import org.testng.annotations.Test;
42 
43 import static org.testng.Assert.assertEquals;
44 import static org.testng.Assert.assertTrue;
45 
46 @Test
47 public class IdGeneratorTest {
48 
getBuilder()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 
testTempNameGenerator()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 
testResetTempNameGenerator()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 
testIdGenerator()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 
checkIds(List<SnippetEvent> events)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 
testIdInException()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 
testResetIdGenerator()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