1 /*

     2  * Copyright (c) 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 import java.lang.module.ModuleDescriptor;

    25 import java.lang.module.ModuleDescriptor.Requires.Modifier;

    26 import java.lang.module.ModuleFinder;

    27 import java.lang.module.ModuleReference;

    28 import java.util.Collections;

    29 import java.util.EnumSet;

    30 import java.util.Map;

    31 import java.util.Set;

    32 

    33 import jdk.internal.misc.JavaLangModuleAccess;

    34 import jdk.internal.misc.SharedSecrets;

    35 import org.testng.annotations.Test;

    36 import static org.testng.Assert.*;

    37 

    38 /**

    39  * @test

    40  * @modules java.base/jdk.internal.misc

    41  * @run testng InstalledModulesTest

    42  * @summary Verify the properties of ModuleDescriptor created

    43  *          by InstalledModules

    44  */

    45 

    46 public class InstalledModulesTest {

    47     private static final JavaLangModuleAccess jlma = SharedSecrets.getJavaLangModuleAccess();

    48 

    49     /**

    50      * Verify ModuleDescriptor contains unmodifiable sets

    51      */

    52     @Test

    53     public void testUnmodifableDescriptors() throws Exception {

    54         ModuleFinder.ofSystem().findAll()

    55                     .stream()

    56                     .map(ModuleReference::descriptor)

    57                     .forEach(this::testModuleDescriptor);

    58     }

    59 

    60     private void testModuleDescriptor(ModuleDescriptor md) {

    61         assertUnmodifiable(md.conceals(), "conceal");

    62         assertUnmodifiable(md.packages(), "package");

    63         assertUnmodifiable(md.requires(),

    64                            jlma.newRequires(EnumSet.allOf(Modifier.class), "require"));

    65         assertUnmodifiable(md.exports(), jlma.newExports("export"));

    66         assertUnmodifiable(md.uses(), "use");

    67         assertUnmodifiable(md.provides(), "provide",

    68                            jlma.newProvides("provide", Collections.singleton("provide")));

    69 

    70     }

    71 

    72     private <T> void assertUnmodifiable(Set<T> set, T dummy) {

    73         try {

    74             set.add(dummy);

    75             fail("Should throw UnsupportedOperationException");

    76         } catch (UnsupportedOperationException e) {

    77             // pass

    78         } catch (Exception e) {

    79             fail("Should throw UnsupportedOperationException");

    80         }

    81     }

    82 

    83     private <T, V> void assertUnmodifiable(Map<T, V> set, T dummyKey, V dummyValue) {

    84         try {

    85             set.put(dummyKey, dummyValue);

    86             fail("Should throw UnsupportedOperationException");

    87         } catch (UnsupportedOperationException e) {

    88             // pass

    89         } catch (Exception e) {

    90             fail("Should throw UnsupportedOperationException");

    91         }

    92     }

    93 

    94 }