1 /*
   2  * Copyright (c) 2013, 2017, 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 8027411 8032869
  27  * @summary test an invalid option
  28  * @modules jdk.jdeps/com.sun.tools.javap
  29  */
  30 
  31 import java.io.*;
  32 import java.util.zip.*;
  33 
  34 public class InvalidOptions {
  35     int errorCount;
  36     String log;
  37 
  38     public static void main(String[] args) throws Exception {
  39         new InvalidOptions().run();
  40     }
  41 
  42     void run() throws Exception {
  43         test(2, "-b", "Error: unknown option: -b",
  44                       "Usage: javap <options> <classes>",
  45                       "use --help for a list of possible options");
  46         if (errorCount > 0)
  47             throw new Exception(errorCount + " errors received");
  48     }
  49 
  50     void test(int expect, String option, String ... expectedOutput) {
  51         String output = runJavap(expect, option);
  52         verify(output, expectedOutput);
  53     }
  54 
  55     String runJavap(int expect, String... option) {
  56         StringWriter sw = new StringWriter();
  57         PrintWriter pw = new PrintWriter(sw);
  58         int rc = com.sun.tools.javap.Main.run(option, pw);
  59         pw.close();
  60         System.out.println("javap prints:");
  61         System.out.println(sw);
  62         if (rc != expect)
  63            throw new Error("Expect to return " + expect + ", but return " + rc);
  64         return sw.toString();
  65     }
  66 
  67     void verify(String output, String... expects) {
  68         for (String expect: expects) {
  69             if (!output.contains(expect))
  70                 error(expect + " not found");
  71         }
  72     }
  73 
  74     void error(String msg) {
  75         System.err.println(msg);
  76         errorCount++;
  77     }
  78 }