1/* 2 * Copyright (c) 2014, 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 8033581 8033798 8033726 27 * @summary Check whitespace in generated output 28 * @modules jdk.jdeps/com.sun.tools.javap 29 */ 30 31import java.io.*; 32import java.util.*; 33 34public class WhitespaceTest { 35 public static void main(String... args) throws Exception { 36 new WhitespaceTest().run(); 37 } 38 39 void run() throws Exception { 40 test("-v", "java.lang.String"); 41 test("-XDtab:1", "-v", "java.lang.String"); 42 43 String testClasses = System.getProperty("test.classes"); 44 for (int i = 10; i < 40; i++) 45 test("-XDtab:" + i, "-v", "-classpath", testClasses, "WhitespaceTest$HelloWorld"); 46 47 if (errors > 0) 48 throw new Exception(errors + " errors found"); 49 } 50 51 void test(String... args) throws Exception { 52 // need to avoid "//" appearing as a constant in the constant pool 53 String slash = "/"; 54 String doubleSlash = slash + slash; 55 System.out.println("test: " + Arrays.asList(args)); 56 String out = javap(args); 57 for (String line: out.split("[\r\n]+")) { 58 if (line.endsWith(" ")) 59 error("line has trailing whitespace: " + line); 60 int comment = line.indexOf(doubleSlash); 61 if (comment > 0 && line.charAt(comment - 1) != ' ') { 62 // make allowance for URLs 63 if (!line.matches(".*\\bfile:/{3}.*")) 64 error("no space before comment: " + line); 65 } 66 if (line.matches(" +}")) 67 error("bad indentation: " + line); 68 } 69 } 70 71 String javap(String... args) throws Exception { 72 StringWriter sw = new StringWriter(); 73 PrintWriter out = new PrintWriter(sw); 74 int rc = com.sun.tools.javap.Main.run(args, out); 75 out.close(); 76 System.out.println(sw.toString()); 77 if (rc < 0) 78 throw new Exception("javap exited, rc=" + rc); 79 return sw.toString(); 80 } 81 82 void error(String msg) { 83 System.out.println("Error: " + msg); 84 errors++; 85 } 86 87 int errors; 88 89 // small class to test repeatedly with different tab values 90 static class HelloWorld { 91 public static void main(String... args) { 92 System.out.println("Hello World!"); 93 } 94 } 95} 96 97 98