1 /*
   2  * Copyright (c) 2015, 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  * @summary Stack trace should have module information
  27  * @run testng ModuleFrames
  28  */
  29 
  30 import java.util.Arrays;
  31 
  32 import org.testng.annotations.Test;
  33 import static org.testng.Assert.*;
  34 
  35 public class ModuleFrames {
  36 
  37     @Test
  38     public void testModuleName() {
  39         try {
  40             Integer.parseInt("a");
  41         } catch (NumberFormatException e) {
  42 
  43             StackTraceElement[] stack = e.getStackTrace();
  44             StackTraceElement topFrame = stack[0];
  45             StackTraceElement thisFrame = findFrame(this.getClass().getName(), stack);
  46 
  47             assertEquals(topFrame.getModuleName(), "java.base",
  48                     "Expected top frame to be in module java.base");
  49 
  50             assertTrue(topFrame.toString().contains("java.base"),
  51                     "Expected toString of top frame to include java.base");
  52 
  53             assertNull(thisFrame.getModuleName(),
  54                     "Expected frame for test not to have a module name");
  55         }
  56     }
  57 
  58     private static StackTraceElement findFrame(String cn, StackTraceElement[] stack) {
  59         return Arrays.stream(stack)
  60                 .filter(s -> s.getClassName().equals(cn))
  61                 .findFirst()
  62                 .get();
  63     }
  64 }