| /* |
| * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 8033581 8033798 8033726 |
| * @summary Check whitespace in generated output |
| * @modules jdk.jdeps/com.sun.tools.javap |
| */ |
| |
| import java.io.*; |
| import java.util.*; |
| |
| public class WhitespaceTest { |
| public static void main(String... args) throws Exception { |
| new WhitespaceTest().run(); |
| } |
| |
| void run() throws Exception { |
| test("-v", "java.lang.String"); |
| test("-XDtab:1", "-v", "java.lang.String"); |
| |
| String testClasses = System.getProperty("test.classes"); |
| for (int i = 10; i < 40; i++) |
| test("-XDtab:" + i, "-v", "-classpath", testClasses, "WhitespaceTest$HelloWorld"); |
| |
| if (errors > 0) |
| throw new Exception(errors + " errors found"); |
| } |
| |
| void test(String... args) throws Exception { |
| // need to avoid "//" appearing as a constant in the constant pool |
| String slash = "/"; |
| String doubleSlash = slash + slash; |
| System.out.println("test: " + Arrays.asList(args)); |
| String out = javap(args); |
| for (String line: out.split("[\r\n]+")) { |
| if (line.endsWith(" ")) |
| error("line has trailing whitespace: " + line); |
| int comment = line.indexOf(doubleSlash); |
| if (comment > 0 && line.charAt(comment - 1) != ' ') { |
| // make allowance for URLs |
| if (!line.matches(".*\\bfile:/{3}.*")) |
| error("no space before comment: " + line); |
| } |
| if (line.matches(" +}")) |
| error("bad indentation: " + line); |
| } |
| } |
| |
| String javap(String... args) throws Exception { |
| StringWriter sw = new StringWriter(); |
| PrintWriter out = new PrintWriter(sw); |
| int rc = com.sun.tools.javap.Main.run(args, out); |
| out.close(); |
| System.out.println(sw.toString()); |
| if (rc < 0) |
| throw new Exception("javap exited, rc=" + rc); |
| return sw.toString(); |
| } |
| |
| void error(String msg) { |
| System.out.println("Error: " + msg); |
| errors++; |
| } |
| |
| int errors; |
| |
| // small class to test repeatedly with different tab values |
| static class HelloWorld { |
| public static void main(String... args) { |
| System.out.println("Hello World!"); |
| } |
| } |
| } |
| |
| |