PrettyPrintingForLoopsTest.java revision 3478:293579e318b9 
1/*
2 * Copyright (c) 2016, 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 8068460
27 * @summary Pretty printing for loops
28 * @library /tools/javac/lib
29 * @modules jdk.compiler/com.sun.tools.javac.api
30 *          jdk.compiler/com.sun.tools.javac.file
31 *          jdk.compiler/com.sun.tools.javac.tree
32 *          jdk.compiler/com.sun.tools.javac.util
33 * @build JavacTestingAbstractProcessor
34 * @run main PrettyPrintingForLoopsTest
35 */
36
37import java.io.IOException;
38import java.io.StringWriter;
39import java.net.URI;
40import java.util.Arrays;
41import java.util.List;
42
43import javax.tools.JavaFileObject;
44import javax.tools.SimpleJavaFileObject;
45import javax.tools.StandardJavaFileManager;
46
47import com.sun.source.tree.CompilationUnitTree;
48import com.sun.source.util.JavacTask;
49import com.sun.tools.javac.api.JavacTool;
50import com.sun.tools.javac.tree.JCTree;
51import com.sun.tools.javac.tree.Pretty;
52import com.sun.tools.javac.util.Assert;
53
54public class PrettyPrintingForLoopsTest {
55
56    public static void main(String... args) throws IOException {
57        new PrettyPrintingForLoopsTest().testForLoop();
58    }
59
60    public void testForLoop() throws IOException {
61        List files = Arrays.asList(new JavaSource(""));
62        JavacTool tool = JavacTool.create();
63        try (StandardJavaFileManager fm = tool.getStandardFileManager(null, null, null)) {
64            JavacTask task = tool.getTask(null, fm, null, null, null, files);
65            Iterable trees = task.parse();
66            CompilationUnitTree thisTree = (CompilationUnitTree)trees.iterator().next();
67            String thisSrc = prettyPrint((JCTree) thisTree);
68            Assert.check(thisSrc.equals(JavaSource.source));
69        }
70    }
71
72    private static String prettyPrint(JCTree tree) throws IOException {
73        StringWriter sw = new StringWriter();
74        new Pretty(sw, true).printExpr(tree);
75        return sw.toString().replaceAll(System.getProperty("line.separator"), "\n");
76    }
77
78    static class JavaSource extends SimpleJavaFileObject {
79        static String source = "\n" +
80                "class Test {\n" +
81                "    \n" +
82                "    void m() {\n" +
83                "        for (int i; true; i++) {\n" +
84                "            i = 0;\n" +
85                "        }\n" +
86                "        for (int i = 0, j, k = 23, l; i < 42; i++) {\n" +
87                "        }\n" +
88                "    }\n" +
89                "}";
90
91        public JavaSource(String stmt) {
92            super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
93        }
94
95        @Override
96        public CharSequence getCharContent(boolean ignoreEncodingErrors) {
97            return source;
98        }
99    }
100}
101