aoqi@0: /*
aoqi@0:  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: /*
aoqi@0:  * @test
aoqi@0:  * @bug 8033581 8033798 8033726
aoqi@0:  * @summary Check whitespace in generated output
aoqi@0:  */
aoqi@0: 
aoqi@0: import java.io.*;
aoqi@0: import java.util.*;
aoqi@0: 
aoqi@0: public class WhitespaceTest {
aoqi@0:     public static void main(String... args) throws Exception {
aoqi@0:         new WhitespaceTest().run();
aoqi@0:     }
aoqi@0: 
aoqi@0:     void run() throws Exception {
aoqi@0:         test("-v", "java.lang.String");
aoqi@0:         test("-XDtab:1", "-v", "java.lang.String");
aoqi@0: 
aoqi@0:         String testClasses = System.getProperty("test.classes");
aoqi@0:         for (int i = 10; i < 40; i++)
aoqi@0:             test("-XDtab:" + i, "-v", "-classpath", testClasses, "WhitespaceTest$HelloWorld");
aoqi@0: 
aoqi@0:         if (errors > 0)
aoqi@0:             throw new Exception(errors + " errors found");
aoqi@0:     }
aoqi@0: 
aoqi@0:     void test(String... args) throws Exception {
aoqi@0:         // need to avoid "//" appearing as a constant in the constant pool
aoqi@0:         String slash = "/";
aoqi@0:         String doubleSlash = slash + slash;
aoqi@0:         System.out.println("test: " + Arrays.asList(args));
aoqi@0:         String out = javap(args);
aoqi@0:         for (String line: out.split("[\r\n]+")) {
aoqi@0:             if (line.endsWith(" "))
aoqi@0:                 error("line has trailing whitespace: " + line);
aoqi@0:             int comment = line.indexOf(doubleSlash);
aoqi@0:             if (comment > 0 && line.charAt(comment - 1) != ' ')
aoqi@0:                 error("no space before comment: " + line);
aoqi@0:             if (line.matches(" +}"))
aoqi@0:                 error("bad indentation: " + line);
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     String javap(String... args) throws Exception {
aoqi@0:         StringWriter sw = new StringWriter();
aoqi@0:         PrintWriter out = new PrintWriter(sw);
aoqi@0:         int rc = com.sun.tools.javap.Main.run(args, out);
aoqi@0:         out.close();
aoqi@0:         System.out.println(sw.toString());
aoqi@0:         if (rc < 0)
aoqi@0:             throw new Exception("javap exited, rc=" + rc);
aoqi@0:         return sw.toString();
aoqi@0:     }
aoqi@0: 
aoqi@0:     void error(String msg) {
aoqi@0:         System.out.println("Error: " + msg);
aoqi@0:         errors++;
aoqi@0:     }
aoqi@0: 
aoqi@0:     int errors;
aoqi@0: 
aoqi@0:     // small class to test repeatedly with different tab values
aoqi@0:     static class HelloWorld {
aoqi@0:         public static void main(String... args) {
aoqi@0:             System.out.println("Hello World!");
aoqi@0:         }
aoqi@0:     }
aoqi@0: }