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 /**

    25  * @test

    26  * @library /lib/testlibrary

    27  * @build LayerControllerTest ModuleUtils

    28  * @run testng LayerControllerTest

    29  * @summary Basic tests for java.lang.ModuleLayer.Controller

    30  */

    31 

    32 import java.lang.module.Configuration;

    33 import java.lang.module.ModuleDescriptor;

    34 import java.lang.module.ModuleFinder;

    35 import java.util.List;

    36 import java.util.Set;

    37 

    38 import org.testng.annotations.Test;

    39 import static org.testng.Assert.*;

    40 

    41 @Test

    42 public class LayerControllerTest {

    43 

    44     /**

    45      * Creates a Controller for a module layer containing modules m1 and m2.

    46      * Module m1 contains p1, reads java.base, does not export/open any package

    47      * Module m2 contains p2, reads java.base, does not export/open any package

    48      */

    49     private ModuleLayer.Controller createTestLayer() {

    50         ModuleDescriptor descriptor1

    51             = ModuleDescriptor.newModule("m1")

    52                 .packages(Set.of("p1"))

    53                 .requires("java.base")

    54                 .build();

    55 

    56         ModuleDescriptor descriptor2

    57             = ModuleDescriptor.newModule("m2")

    58                 .requires("java.base")

    59                 .packages(Set.of("p2"))

    60                 .build();

    61 

    62         ModuleFinder finder = ModuleUtils.finderOf(descriptor1, descriptor2);

    63         ModuleLayer bootLayer = ModuleLayer.boot();

    64 

    65         Configuration cf = bootLayer.configuration()

    66                 .resolve(finder, ModuleFinder.of(), Set.of("m1", "m2"));

    67 

    68         ClassLoader scl = ClassLoader.getSystemClassLoader();

    69 

    70         ModuleLayer.Controller controller

    71             = ModuleLayer.defineModulesWithOneLoader(cf, List.of(bootLayer), scl);

    72 

    73         ModuleLayer layer = controller.layer();

    74 

    75         assertTrue(layer.modules().size() == 2);

    76         assertTrue(layer.findModule("m1").isPresent());

    77         assertTrue(layer.findModule("m2").isPresent());

    78 

    79         return controller;

    80     }

    81 

    82     /**

    83      * Basic test of Controller to update modules m1 and m2 to read and

    84      * open packages to each other.

    85      */

    86     public void testBasic() {

    87         ModuleLayer.Controller controller = createTestLayer();

    88         ModuleLayer layer = controller.layer();

    89         Module m1 = layer.findModule("m1").orElseThrow(RuntimeException::new);

    90         Module m2 = layer.findModule("m2").orElseThrow(RuntimeException::new);

    91 

    92         assertFalse(m1.canRead(m2));

    93         assertFalse(m1.isExported("p1"));

    94         assertFalse(m1.isOpen("p1"));

    95         assertFalse(m1.isExported("p1", m2));

    96         assertFalse(m1.isOpen("p1", m2));

    97 

    98         assertFalse(m2.canRead(m1));

    99         assertFalse(m2.isExported("p2"));

   100         assertFalse(m2.isOpen("p2"));

   101         assertFalse(m2.isExported("p2", m1));

   102         assertFalse(m2.isOpen("p2", m1));

   103 

   104         // update m1 to read m2

   105         assertTrue(controller.addReads(m1, m2) == controller);

   106         assertTrue(m1.canRead(m2));

   107         assertFalse(m2.canRead(m1));

   108 

   109         // update m2 to read m1

   110         assertTrue(controller.addReads(m2, m1) == controller);

   111         assertTrue(m1.canRead(m2));

   112         assertTrue(m1.canRead(m1));

   113 

   114         // update m1 to open p1 to m2

   115         assertTrue(controller.addOpens(m1, "p1", m2) == controller);

   116         assertTrue(m1.isExported("p1", m2));

   117         assertTrue(m1.isOpen("p1", m2));

   118         assertFalse(m1.isExported("p1"));

   119         assertFalse(m1.isOpen("p1"));

   120 

   121         // update m2 to open p2 to m1

   122         assertTrue(controller.addOpens(m2, "p2", m1) == controller);

   123         assertTrue(m2.isExported("p2", m1));

   124         assertTrue(m2.isOpen("p2", m1));

   125         assertFalse(m2.isExported("p2"));

   126         assertFalse(m2.isOpen("p2"));

   127     }

   128 

   129     /**

   130      * Test invalid argument handling

   131      */

   132     public void testBadArguments() {

   133         ModuleLayer.Controller controller = createTestLayer();

   134         ModuleLayer layer = controller.layer();

   135         Module m1 = layer.findModule("m1").orElseThrow(RuntimeException::new);

   136         Module m2 = layer.findModule("m2").orElseThrow(RuntimeException::new);

   137         Module base = Object.class.getModule();

   138 

   139         // java.base is not in layer

   140         try {

   141             controller.addReads(base, m2);

   142             assertTrue(false);

   143         } catch (IllegalArgumentException expected) { }

   144 

   145         // java.base is not in layer

   146         try {

   147             controller.addOpens(base, "java.lang", m2);

   148             assertTrue(false);

   149         } catch (IllegalArgumentException expected) { }

   150 

   151         // m1 does not contain java.lang

   152         try {

   153             controller.addOpens(m1, "java.lang", m2);

   154             assertTrue(false);

   155         } catch (IllegalArgumentException expected) { }

   156     }

   157 

   158     /**

   159      * Test null handling

   160      */

   161     public void testNulls() {

   162         ModuleLayer.Controller controller = createTestLayer();

   163         ModuleLayer layer = controller.layer();

   164         Module m1 = layer.findModule("m1").orElseThrow(RuntimeException::new);

   165         Module m2 = layer.findModule("m2").orElseThrow(RuntimeException::new);

   166         assertTrue(m1 != null);

   167         assertTrue(m2 != null);

   168 

   169         try {

   170             controller.addReads(null, m2);

   171             assertTrue(false);

   172         } catch (NullPointerException expected) { }

   173 

   174         try {

   175             controller.addReads(m1, null);

   176             assertTrue(false);

   177         } catch (NullPointerException expected) { }

   178 

   179         try {

   180             controller.addOpens(null, "p1", m2);

   181             assertTrue(false);

   182         } catch (NullPointerException expected) { }

   183 

   184         try {

   185             controller.addOpens(m1, null, m2);

   186             assertTrue(false);

   187         } catch (NullPointerException expected) { }

   188 

   189         try {

   190             controller.addOpens(m1, "p1", null);

   191             assertTrue(false);

   192         } catch (NullPointerException expected) { }

   193     }

   194 }