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.nio.file.Files;
  31 import java.nio.file.Path;
  32 import java.nio.file.Paths;
  33 import java.util.Arrays;
  34 
  35 import org.testng.annotations.Test;
  36 import static org.testng.Assert.*;
  37 
  38 public class ModuleFrames {
  39 
  40     @Test
  41     public void testModuleName() {
  42         try {
  43             Integer.parseInt("a");
  44         } catch (NumberFormatException e) {
  45 
  46             StackTraceElement[] stack = e.getStackTrace();
  47             StackTraceElement topFrame = stack[0];
  48             StackTraceElement thisFrame = findFrame(this.getClass().getName(), stack);
  49 
  50             assertEquals(topFrame.getModuleName(), "java.base",
  51                     "Expected top frame to be in module java.base");
  52 
  53             assertTrue(topFrame.toString().startsWith("java.base"),
  54                     "Expected toString of top frame to omit loader name, start with module name: java.base");
  55 
  56             assertTrue(!topFrame.toString().contains("@"),
  57                     "Expected toString of top frame not to include module version ('@')");
  58 
  59             Path home = Paths.get(System.getProperty("java.home"));
  60             boolean isImage = Files.exists(home.resolve("lib").resolve("modules"));
  61             if (isImage) {
  62                 assertTrue(!topFrame.getModuleVersion().isEmpty(),
  63                         "Expected non-empty STE.getModuleVersion() for top frame");
  64             }
  65 
  66             assertNull(thisFrame.getModuleName(),
  67                     "Expected frame for test not to have a module name");
  68 
  69             assertTrue(thisFrame.toString().startsWith(this.getClass().getName()),
  70                     "Expected toString to start with class name (no loader or module name");
  71 
  72             assertEquals(thisFrame.getClassLoaderName(), "app",
  73                     "Expect STE to have loader name of \"app\"");
  74         }
  75     }
  76 
  77     private static StackTraceElement findFrame(String cn, StackTraceElement[] stack) {
  78         return Arrays.stream(stack)
  79                 .filter(s -> s.getClassName().equals(cn))
  80                 .findFirst()
  81                 .get();
  82     }
  83 }
--- EOF ---