jdk8-mips64-public/langtools: test/tools/javap/WhitespaceTest.java@0b6cc4ea670f

     1 /*

     2  * Copyright (c) 2014, 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  */

    24 /*

    25  * @test

    26  * @bug 8033581 8033798 8033726

    27  * @summary Check whitespace in generated output

    28  */

    30 import java.io.*;

    31 import java.util.*;

    33 public class WhitespaceTest {

    34     public static void main(String... args) throws Exception {

    35         new WhitespaceTest().run();

    36     }

    38     void run() throws Exception {

    39         test("-v", "java.lang.String");

    40         test("-XDtab:1", "-v", "java.lang.String");

    42         String testClasses = System.getProperty("test.classes");

    43         for (int i = 10; i < 40; i++)

    44             test("-XDtab:" + i, "-v", "-classpath", testClasses, "WhitespaceTest$HelloWorld");

    46         if (errors > 0)

    47             throw new Exception(errors + " errors found");

    48     }

    50     void test(String... args) throws Exception {

    51         // need to avoid "//" appearing as a constant in the constant pool

    52         String slash = "/";

    53         String doubleSlash = slash + slash;

    54         System.out.println("test: " + Arrays.asList(args));

    55         String out = javap(args);

    56         for (String line: out.split("[\r\n]+")) {

    57             if (line.endsWith(" "))

    58                 error("line has trailing whitespace: " + line);

    59             int comment = line.indexOf(doubleSlash);

    60             if (comment > 0 && line.charAt(comment - 1) != ' ')

    61                 error("no space before comment: " + line);

    62             if (line.matches(" +}"))

    63                 error("bad indentation: " + line);

    64         }

    65     }

    67     String javap(String... args) throws Exception {

    68         StringWriter sw = new StringWriter();

    69         PrintWriter out = new PrintWriter(sw);

    70         int rc = com.sun.tools.javap.Main.run(args, out);

    71         out.close();

    72         System.out.println(sw.toString());

    73         if (rc < 0)

    74             throw new Exception("javap exited, rc=" + rc);

    75         return sw.toString();

    76     }

    78     void error(String msg) {

    79         System.out.println("Error: " + msg);

    80         errors++;

    81     }

    83     int errors;

    85     // small class to test repeatedly with different tab values

    86     static class HelloWorld {

    87         public static void main(String... args) {

    88             System.out.println("Hello World!");

    89         }

    90     }

    91 }

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