1 /*
2 * Copyright (c) 2019, 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 * @bug 8223305
27 * @summary Verify Tree.toString() related to switch expressions
28 * @modules jdk.compiler
29 */
30
31 import java.net.URI;
32 import java.util.Arrays;
33 import java.util.List;
34
35 import javax.tools.*;
36
37 import com.sun.source.util.JavacTask;
38
39 public class ExpressionSwitchToString {
40
41 private static final String CODE =
42 "public class C {" +
43 " void t1(Integer i) {" +
44 " switch (i) {" +
45 " case null: i++; break;" +
46 " case 0, 1: i++; break;" +
47 " default: i++; break;" +
48 " }" +
49 " }" +
50 " int t2(Integer i) {" +
51 " return switch (i) {" +
52 " case null: yield 0;" +
53 " case 0, 1: yield 1;" +
54 " default: yield 2;" +
55 " }" +
56 " }" +
57 "}";
58
59 private static final String EXPECTED =
60 "\n" +
61 "public class C {\n" +
62 " \n" +
63 " void t1(Integer i) {\n" +
64 " switch (i) {\n" +
65 " case null:\n" +
66 " i++;\n" +
67 " break;\n" +
68 " \n" +
69 " case 0, 1:\n" +
70 " i++;\n" +
71 " break;\n" +
72 " \n" +
73 " default:\n" +
74 " i++;\n" +
75 " break;\n" +
76 " \n" +
77 " }\n" +
78 " }\n" +
79 " \n" +
80 " int t2(Integer i) {\n" +
81 " return switch (i) {\n" +
82 " case null:\n" +
83 " yield 0;\n" +
84 " \n" +
85 " case 0, 1:\n" +
86 " yield 1;\n" +
87 " \n" +
88 " default:\n" +
89 " yield 2;\n" +
90 " \n" +
91 " };\n" +
92 " }\n" +
93 "}";
94
95 public static void main(String[] args) throws Exception {
96 final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
97 assert tool != null;
98 DiagnosticListener<JavaFileObject> noErrors = d -> {};
99 String sourceVersion = Integer.toString(Runtime.version().feature());
100
101 JavacTask ct = (JavacTask) tool.getTask(null, null, noErrors,
102 List.of("-XDdev"), null,
103 Arrays.asList(new MyFileObject(CODE)));
104 String actualCode = ct.parse().iterator().next().toString();
105 actualCode = actualCode.replace(System.getProperty("line.separator"), "\n");
106 if (!EXPECTED.equals(actualCode)) {
107 throw new AssertionError("Unexpected toString outcome: " +
108 actualCode);
109 }
110 }
111
112 static class MyFileObject extends SimpleJavaFileObject {
113 private String text;
114
115 public MyFileObject(String text) {
116 super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
117 this.text = text;
118 }
119
120 @Override
121 public CharSequence getCharContent(boolean ignoreEncodingErrors) {
122 return text;
123 }
124 }
125 }