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.reflect.Layer.Controller

    30  */

    31 

    32 import java.lang.module.Configuration;

    33 import java.lang.module.ModuleDescriptor;

    34 import java.lang.module.ModuleFinder;

    35 import java.lang.reflect.Layer;

    36 import java.lang.reflect.Module;

    37 import java.util.List;

    38 import java.util.Set;

    39 

    40 import org.testng.annotations.Test;

    41 import static org.testng.Assert.*;

    42 

    43 @Test

    44 public class LayerControllerTest {

    45 

    46     /**

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

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

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

    50      */

    51     private Layer.Controller createTestLayer() {

    52         ModuleDescriptor descriptor1

    53             = ModuleDescriptor.newModule("m1")

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

    55                 .requires("java.base")

    56                 .build();

    57 

    58         ModuleDescriptor descriptor2

    59             = ModuleDescriptor.newModule("m2")

    60                 .requires("java.base")

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

    62                 .build();

    63 

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

    65         Layer bootLayer = Layer.boot();

    66 

    67         Configuration cf = bootLayer.configuration()

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

    69 

    70         ClassLoader scl = ClassLoader.getSystemClassLoader();

    71 

    72         Layer.Controller controller

    73                 = Layer.defineModulesWithOneLoader(cf, List.of(bootLayer), scl);

    74 

    75         Layer layer = controller.layer();

    76 

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

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

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

    80 

    81         return controller;

    82     }

    83 

    84     /**

    85      * Basic test of Layer.Controller to update modules m1 and m2 to read and

    86      * open packages to each other.

    87      */

    88     public void testBasic() {

    89         Layer.Controller controller = createTestLayer();

    90         Layer layer = controller.layer();

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

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

    93 

    94         assertFalse(m1.canRead(m2));

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

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

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

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

    99 

   100         assertFalse(m2.canRead(m1));

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

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

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

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

   105 

   106         // update m1 to read m2

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

   108         assertTrue(m1.canRead(m2));

   109         assertFalse(m2.canRead(m1));

   110 

   111         // update m2 to read m1

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

   113         assertTrue(m1.canRead(m2));

   114         assertTrue(m1.canRead(m1));

   115 

   116         // update m1 to open p1 to m2

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

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

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

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

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

   122 

   123         // update m2 to open p2 to m1

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

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

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

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

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

   129     }

   130 

   131     /**

   132      * Test invalid argument handling

   133      */

   134     public void testBadArguments() {

   135         Layer.Controller controller = createTestLayer();

   136         Layer layer = controller.layer();

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

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

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

   140 

   141         // java.base is not in layer

   142         try {

   143             controller.addReads(base, m2);

   144             assertTrue(false);

   145         } catch (IllegalArgumentException expected) { }

   146 

   147         // java.base is not in layer

   148         try {

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

   150             assertTrue(false);

   151         } catch (IllegalArgumentException expected) { }

   152 

   153         // m1 does not contain java.lang

   154         try {

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

   156             assertTrue(false);

   157         } catch (IllegalArgumentException expected) { }

   158     }

   159 

   160     /**

   161      * Test null handling

   162      */

   163     public void testNulls() {

   164         Layer.Controller controller = createTestLayer();

   165         Layer layer = controller.layer();

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

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

   168         assertTrue(m1 != null);

   169         assertTrue(m2 != null);

   170 

   171         try {

   172             controller.addReads(null, m2);

   173             assertTrue(false);

   174         } catch (NullPointerException expected) { }

   175 

   176         try {

   177             controller.addReads(m1, null);

   178             assertTrue(false);

   179         } catch (NullPointerException expected) { }

   180 

   181         try {

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

   183             assertTrue(false);

   184         } catch (NullPointerException expected) { }

   185 

   186         try {

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

   188             assertTrue(false);

   189         } catch (NullPointerException expected) { }

   190 

   191         try {

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

   193             assertTrue(false);

   194         } catch (NullPointerException expected) { }

   195     }

   196 }