--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/lang/ModuleLayer/BasicLayerTest.java Fri Apr 07 08:05:54 2017 +0000
@@ -0,0 +1,1213 @@
+/*
+ * Copyright (c) 2014, 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * @test
+ * @library /lib/testlibrary
+ * @modules java.base/jdk.internal.misc
+ * @build BasicLayerTest ModuleUtils
+ * @compile layertest/Test.java
+ * @run testng BasicLayerTest
+ * @summary Basic tests for java.lang.ModuleLayer
+ */
+
+import java.lang.module.Configuration;
+import java.lang.module.ModuleDescriptor;
+import java.lang.module.ModuleDescriptor.Requires;
+import java.lang.module.ModuleFinder;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import jdk.internal.misc.SharedSecrets;
+
+import org.testng.annotations.DataProvider;
+import org.testng.annotations.Test;
+import static org.testng.Assert.*;
+
+@Test
+public class BasicLayerTest {
+
+ /**
+ * Creates a "non-strict" builder for building a module. This allows the
+ * test the create ModuleDescriptor objects that do not require java.base.
+ */
+ private static ModuleDescriptor.Builder newBuilder(String mn) {
+ return SharedSecrets.getJavaLangModuleAccess()
+ .newModuleBuilder(mn, false, Set.of());
+ }
+
+ /**
+ * Exercise ModuleLayer.empty()
+ */
+ public void testEmpty() {
+ ModuleLayer emptyLayer = ModuleLayer.empty();
+
+ assertTrue(emptyLayer.parents().isEmpty());
+
+ assertTrue(emptyLayer.configuration() == Configuration.empty());
+
+ assertTrue(emptyLayer.modules().isEmpty());
+
+ assertFalse(emptyLayer.findModule("java.base").isPresent());
+
+ try {
+ emptyLayer.findLoader("java.base");
+ assertTrue(false);
+ } catch (IllegalArgumentException expected) { }
+ }
+
+
+ /**
+ * Exercise ModuleLayer.boot()
+ */
+ public void testBoot() {
+ ModuleLayer bootLayer = ModuleLayer.boot();
+
+ // configuration
+ Configuration cf = bootLayer.configuration();
+ assertTrue(cf.findModule("java.base").get()
+ .reference()
+ .descriptor()
+ .exports()
+ .stream().anyMatch(e -> (e.source().equals("java.lang")
+ && !e.isQualified())));
+
+ // modules
+ Set<Module> modules = bootLayer.modules();
+ assertTrue(modules.contains(Object.class.getModule()));
+ int count = (int) modules.stream().map(Module::getName).count();
+ assertEquals(count, modules.size()); // module names are unique
+
+ // findModule
+ Module base = Object.class.getModule();
+ assertTrue(bootLayer.findModule("java.base").get() == base);
+ assertTrue(base.getLayer() == bootLayer);
+
+ // findLoader
+ assertTrue(bootLayer.findLoader("java.base") == null);
+
+ // parents
+ assertTrue(bootLayer.parents().size() == 1);
+ assertTrue(bootLayer.parents().get(0) == ModuleLayer.empty());
+ }
+
+
+ /**
+ * Exercise defineModules, created with empty layer as parent
+ */
+ public void testLayerOnEmpty() {
+ ModuleDescriptor descriptor1 = newBuilder("m1")
+ .requires("m2")
+ .exports("p1")
+ .build();
+
+ ModuleDescriptor descriptor2 = newBuilder("m2")
+ .requires("m3")
+ .build();
+
+ ModuleDescriptor descriptor3 = newBuilder("m3")
+ .build();
+
+ ModuleFinder finder
+ = ModuleUtils.finderOf(descriptor1, descriptor2, descriptor3);
+
+ Configuration cf = resolve(finder, "m1");
+
+ // map each module to its own class loader for this test
+ ClassLoader loader1 = new ClassLoader() { };
+ ClassLoader loader2 = new ClassLoader() { };
+ ClassLoader loader3 = new ClassLoader() { };
+ Map<String, ClassLoader> map = new HashMap<>();
+ map.put("m1", loader1);
+ map.put("m2", loader2);
+ map.put("m3", loader3);
+
+ ModuleLayer layer = ModuleLayer.empty().defineModules(cf, map::get);
+
+ // configuration
+ assertTrue(layer.configuration() == cf);
+ assertTrue(layer.configuration().modules().size() == 3);
+
+ // modules
+ Set<Module> modules = layer.modules();
+ assertTrue(modules.size() == 3);
+ Set<String> names = modules.stream()
+ .map(Module::getName)
+ .collect(Collectors.toSet());
+ assertTrue(names.contains("m1"));
+ assertTrue(names.contains("m2"));
+ assertTrue(names.contains("m3"));
+
+ // findModule
+ Module m1 = layer.findModule("m1").get();
+ Module m2 = layer.findModule("m2").get();
+ Module m3 = layer.findModule("m3").get();
+ assertEquals(m1.getName(), "m1");
+ assertEquals(m2.getName(), "m2");
+ assertEquals(m3.getName(), "m3");
+ assertTrue(m1.getDescriptor() == descriptor1);
+ assertTrue(m2.getDescriptor() == descriptor2);
+ assertTrue(m3.getDescriptor() == descriptor3);
+ assertTrue(m1.getLayer() == layer);
+ assertTrue(m2.getLayer() == layer);
+ assertTrue(m3.getLayer() == layer);
+ assertTrue(modules.contains(m1));
+ assertTrue(modules.contains(m2));
+ assertTrue(modules.contains(m3));
+ assertFalse(layer.findModule("godot").isPresent());
+
+ // findLoader
+ assertTrue(layer.findLoader("m1") == loader1);
+ assertTrue(layer.findLoader("m2") == loader2);
+ assertTrue(layer.findLoader("m3") == loader3);
+ try {
+ ClassLoader loader = layer.findLoader("godot");
+ assertTrue(false);
+ } catch (IllegalArgumentException ignore) { }
+
+ // parents
+ assertTrue(layer.parents().size() == 1);
+ assertTrue(layer.parents().get(0) == ModuleLayer.empty());
+ }
+
+
+ /**
+ * Exercise defineModules, created with boot layer as parent
+ */
+ public void testLayerOnBoot() {
+ ModuleDescriptor descriptor1 = newBuilder("m1")
+ .requires("m2")
+ .requires("java.base")
+ .exports("p1")
+ .build();
+
+ ModuleDescriptor descriptor2 = newBuilder("m2")
+ .requires("java.base")
+ .build();
+
+ ModuleFinder finder
+ = ModuleUtils.finderOf(descriptor1, descriptor2);
+
+ Configuration parent = ModuleLayer.boot().configuration();
+ Configuration cf = resolve(parent, finder, "m1");
+
+ ClassLoader loader = new ClassLoader() { };
+
+ ModuleLayer layer = ModuleLayer.boot().defineModules(cf, mn -> loader);
+
+ // configuration
+ assertTrue(layer.configuration() == cf);
+ assertTrue(layer.configuration().modules().size() == 2);
+
+ // modules
+ Set<Module> modules = layer.modules();
+ assertTrue(modules.size() == 2);
+ Set<String> names = modules.stream()
+ .map(Module::getName)
+ .collect(Collectors.toSet());
+ assertTrue(names.contains("m1"));
+ assertTrue(names.contains("m2"));
+
+ // findModule
+ Module m1 = layer.findModule("m1").get();
+ Module m2 = layer.findModule("m2").get();
+ assertEquals(m1.getName(), "m1");
+ assertEquals(m2.getName(), "m2");
+ assertTrue(m1.getDescriptor() == descriptor1);
+ assertTrue(m2.getDescriptor() == descriptor2);
+ assertTrue(m1.getLayer() == layer);
+ assertTrue(m2.getLayer() == layer);
+ assertTrue(modules.contains(m1));
+ assertTrue(modules.contains(m2));
+ assertTrue(layer.findModule("java.base").get() == Object.class.getModule());
+ assertFalse(layer.findModule("godot").isPresent());
+
+ // findLoader
+ assertTrue(layer.findLoader("m1") == loader);
+ assertTrue(layer.findLoader("m2") == loader);
+ assertTrue(layer.findLoader("java.base") == null);
+
+ // parents
+ assertTrue(layer.parents().size() == 1);
+ assertTrue(layer.parents().get(0) == ModuleLayer.boot());
+ }
+
+
+ /**
+ * Exercise defineModules with a configuration of two modules that
+ * have the same module-private package.
+ */
+ public void testPackageContainedInSelfAndOther() {
+ ModuleDescriptor descriptor1 = newBuilder("m1")
+ .requires("m2")
+ .packages(Set.of("p"))
+ .build();
+
+ ModuleDescriptor descriptor2 = newBuilder("m2")
+ .packages(Set.of("p"))
+ .build();
+
+ ModuleFinder finder
+ = ModuleUtils.finderOf(descriptor1, descriptor2);
+
+ Configuration cf = resolve(finder, "m1");
+ assertTrue(cf.modules().size() == 2);
+
+ // one loader per module, should be okay
+ ModuleLayer.empty().defineModules(cf, mn -> new ClassLoader() { });
+
+ // same class loader
+ try {
+ ClassLoader loader = new ClassLoader() { };
+ ModuleLayer.empty().defineModules(cf, mn -> loader);
+ assertTrue(false);
+ } catch (LayerInstantiationException expected) { }
+ }
+
+
+ /**
+ * Exercise defineModules with a configuration that is a partitioned
+ * graph. The same package is exported in both partitions.
+ */
+ public void testSameExportInPartitionedGraph() {
+
+ // m1 reads m2, m2 exports p to m1
+ ModuleDescriptor descriptor1 = newBuilder("m1")
+ .requires("m2")
+ .build();
+ ModuleDescriptor descriptor2 = newBuilder("m2")
+ .exports("p", Set.of("m1"))
+ .build();
+
+ // m3 reads m4, m4 exports p to m3
+ ModuleDescriptor descriptor3 = newBuilder("m3")
+ .requires("m4")
+ .build();
+ ModuleDescriptor descriptor4 = newBuilder("m4")
+ .exports("p", Set.of("m3"))
+ .build();
+
+ ModuleFinder finder
+ = ModuleUtils.finderOf(descriptor1,
+ descriptor2,
+ descriptor3,
+ descriptor4);
+
+ Configuration cf = resolve(finder, "m1", "m3");
+ assertTrue(cf.modules().size() == 4);
+
+ // one loader per module
+ ModuleLayer.empty().defineModules(cf, mn -> new ClassLoader() { });
+
+ // m1 & m2 in one loader, m3 & m4 in another loader
+ ClassLoader loader1 = new ClassLoader() { };
+ ClassLoader loader2 = new ClassLoader() { };
+ Map<String, ClassLoader> map = new HashMap<>();
+ map.put("m1", loader1);
+ map.put("m2", loader1);
+ map.put("m3", loader2);
+ map.put("m4", loader2);
+ ModuleLayer.empty().defineModules(cf, map::get);
+
+ // same loader
+ try {
+ ClassLoader loader = new ClassLoader() { };
+ ModuleLayer.empty().defineModules(cf, mn -> loader);
+ assertTrue(false);
+ } catch (LayerInstantiationException expected) { }
+ }
+
+
+ /**
+ * Exercise defineModules with a configuration with a module that
+ * contains a package that is the same name as a non-exported package in
+ * a parent layer.
+ */
+ public void testContainsSamePackageAsBootLayer() {
+
+ // check assumption that java.base contains sun.launcher
+ ModuleDescriptor base = Object.class.getModule().getDescriptor();
+ assertTrue(base.packages().contains("sun.launcher"));
+
+ ModuleDescriptor descriptor = newBuilder("m1")
+ .requires("java.base")
+ .packages(Set.of("sun.launcher"))
+ .build();
+
+ ModuleFinder finder = ModuleUtils.finderOf(descriptor);
+
+ Configuration parent = ModuleLayer.boot().configuration();
+ Configuration cf = parent.resolve(finder, ModuleFinder.of(), Set.of("m1"));
+ assertTrue(cf.modules().size() == 1);
+
+ ClassLoader loader = new ClassLoader() { };
+ ModuleLayer layer = ModuleLayer.boot().defineModules(cf, mn -> loader);
+ assertTrue(layer.modules().size() == 1);
+ }
+
+
+ /**
+ * Test layers with implied readability.
+ *
+ * The test consists of three configurations:
+ * - Configuration/layer1: m1, m2 requires transitive m1
+ * - Configuration/layer2: m3 requires m1
+ */
+ public void testImpliedReadabilityWithLayers1() {
+
+ // cf1: m1 and m2, m2 requires transitive m1
+
+ ModuleDescriptor descriptor1 = newBuilder("m1")
+ .build();
+
+ ModuleDescriptor descriptor2 = newBuilder("m2")
+ .requires(Set.of(Requires.Modifier.TRANSITIVE), "m1")
+ .build();
+
+ ModuleFinder finder1 = ModuleUtils.finderOf(descriptor1, descriptor2);
+
+ Configuration cf1 = resolve(finder1, "m2");
+
+ ClassLoader cl1 = new ClassLoader() { };
+ ModuleLayer layer1 = ModuleLayer.empty().defineModules(cf1, mn -> cl1);
+
+
+ // cf2: m3, m3 requires m2
+
+ ModuleDescriptor descriptor3 = newBuilder("m3")
+ .requires("m2")
+ .build();
+
+ ModuleFinder finder2 = ModuleUtils.finderOf(descriptor3);
+
+ Configuration cf2 = resolve(cf1, finder2, "m3");
+
+ ClassLoader cl2 = new ClassLoader() { };
+ ModuleLayer layer2 = layer1.defineModules(cf2, mn -> cl2);
+
+ assertTrue(layer1.parents().size() == 1);
+ assertTrue(layer1.parents().get(0) == ModuleLayer.empty());
+
+ assertTrue(layer2.parents().size() == 1);
+ assertTrue(layer2.parents().get(0) == layer1);
+
+ Module m1 = layer2.findModule("m1").get();
+ Module m2 = layer2.findModule("m2").get();
+ Module m3 = layer2.findModule("m3").get();
+
+ assertTrue(m1.getLayer() == layer1);
+ assertTrue(m2.getLayer() == layer1);
+ assertTrue(m3.getLayer() == layer2);
+
+ assertTrue(m1.getClassLoader() == cl1);
+ assertTrue(m2.getClassLoader() == cl1);
+ assertTrue(m3.getClassLoader() == cl2);
+
+ assertTrue(m1.canRead(m1));
+ assertFalse(m1.canRead(m2));
+ assertFalse(m1.canRead(m3));
+
+ assertTrue(m2.canRead(m1));
+ assertTrue(m2.canRead(m2));
+ assertFalse(m2.canRead(m3));
+
+ assertTrue(m3.canRead(m1));
+ assertTrue(m3.canRead(m2));
+ assertTrue(m3.canRead(m3));
+ }
+
+
+ /**
+ * Test layers with implied readability.
+ *
+ * The test consists of three configurations:
+ * - Configuration/layer1: m1
+ * - Configuration/layer2: m2 requires transitive m3, m3 requires m2
+ */
+ public void testImpliedReadabilityWithLayers2() {
+
+ // cf1: m1
+
+ ModuleDescriptor descriptor1 = newBuilder("m1").build();
+
+ ModuleFinder finder1 = ModuleUtils.finderOf(descriptor1);
+
+ Configuration cf1 = resolve(finder1, "m1");
+
+ ClassLoader cl1 = new ClassLoader() { };
+ ModuleLayer layer1 = ModuleLayer.empty().defineModules(cf1, mn -> cl1);
+
+
+ // cf2: m2, m3: m2 requires transitive m1, m3 requires m2
+
+ ModuleDescriptor descriptor2 = newBuilder("m2")
+ .requires(Set.of(Requires.Modifier.TRANSITIVE), "m1")
+ .build();
+
+ ModuleDescriptor descriptor3 = newBuilder("m3")
+ .requires("m2")
+ .build();
+
+ ModuleFinder finder2 = ModuleUtils.finderOf(descriptor2, descriptor3);
+
+ Configuration cf2 = resolve(cf1, finder2, "m3");
+
+ ClassLoader cl2 = new ClassLoader() { };
+ ModuleLayer layer2 = layer1.defineModules(cf2, mn -> cl2);
+
+ assertTrue(layer1.parents().size() == 1);
+ assertTrue(layer1.parents().get(0) == ModuleLayer.empty());
+
+ assertTrue(layer2.parents().size() == 1);
+ assertTrue(layer2.parents().get(0) == layer1);
+
+ Module m1 = layer2.findModule("m1").get();
+ Module m2 = layer2.findModule("m2").get();
+ Module m3 = layer2.findModule("m3").get();
+
+ assertTrue(m1.getLayer() == layer1);
+ assertTrue(m2.getLayer() == layer2);
+ assertTrue(m3.getLayer() == layer2);
+
+ assertTrue(m1.canRead(m1));
+ assertFalse(m1.canRead(m2));
+ assertFalse(m1.canRead(m3));
+
+ assertTrue(m2.canRead(m1));
+ assertTrue(m2.canRead(m2));
+ assertFalse(m2.canRead(m3));
+
+ assertTrue(m3.canRead(m1));
+ assertTrue(m3.canRead(m2));
+ assertTrue(m3.canRead(m3));
+ }
+
+
+ /**
+ * Test layers with implied readability.
+ *
+ * The test consists of three configurations:
+ * - Configuration/layer1: m1
+ * - Configuration/layer2: m2 requires transitive m1
+ * - Configuration/layer3: m3 requires m1
+ */
+ public void testImpliedReadabilityWithLayers3() {
+
+ // cf1: m1
+
+ ModuleDescriptor descriptor1 = newBuilder("m1").build();
+
+ ModuleFinder finder1 = ModuleUtils.finderOf(descriptor1);
+
+ Configuration cf1 = resolve(finder1, "m1");
+
+ ClassLoader cl1 = new ClassLoader() { };
+ ModuleLayer layer1 = ModuleLayer.empty().defineModules(cf1, mn -> cl1);
+
+
+ // cf2: m2 requires transitive m1
+
+ ModuleDescriptor descriptor2 = newBuilder("m2")
+ .requires(Set.of(Requires.Modifier.TRANSITIVE), "m1")
+ .build();
+
+ ModuleFinder finder2 = ModuleUtils.finderOf(descriptor2);
+
+ Configuration cf2 = resolve(cf1, finder2, "m2");
+
+ ClassLoader cl2 = new ClassLoader() { };
+ ModuleLayer layer2 = layer1.defineModules(cf2, mn -> cl2);
+
+
+ // cf3: m3 requires m2
+
+ ModuleDescriptor descriptor3 = newBuilder("m3")
+ .requires("m2")
+ .build();
+
+ ModuleFinder finder3 = ModuleUtils.finderOf(descriptor3);
+
+ Configuration cf3 = resolve(cf2, finder3, "m3");
+
+ ClassLoader cl3 = new ClassLoader() { };
+ ModuleLayer layer3 = layer2.defineModules(cf3, mn -> cl3);
+
+ assertTrue(layer1.parents().size() == 1);
+ assertTrue(layer1.parents().get(0) == ModuleLayer.empty());
+
+ assertTrue(layer2.parents().size() == 1);
+ assertTrue(layer2.parents().get(0) == layer1);
+
+ assertTrue(layer3.parents().size() == 1);
+ assertTrue(layer3.parents().get(0) == layer2);
+
+ Module m1 = layer3.findModule("m1").get();
+ Module m2 = layer3.findModule("m2").get();
+ Module m3 = layer3.findModule("m3").get();
+
+ assertTrue(m1.getLayer() == layer1);
+ assertTrue(m2.getLayer() == layer2);
+ assertTrue(m3.getLayer() == layer3);
+
+ assertTrue(m1.canRead(m1));
+ assertFalse(m1.canRead(m2));
+ assertFalse(m1.canRead(m3));
+
+ assertTrue(m2.canRead(m1));
+ assertTrue(m2.canRead(m2));
+ assertFalse(m2.canRead(m3));
+
+ assertTrue(m3.canRead(m1));
+ assertTrue(m3.canRead(m2));
+ assertTrue(m3.canRead(m3));
+ }
+
+
+ /**
+ * Test layers with implied readability.
+ *
+ * The test consists of two configurations:
+ * - Configuration/layer1: m1, m2 requires transitive m1
+ * - Configuration/layer2: m3 requires transitive m2, m4 requires m3
+ */
+ public void testImpliedReadabilityWithLayers4() {
+
+ // cf1: m1, m2 requires transitive m1
+
+ ModuleDescriptor descriptor1 = newBuilder("m1")
+ .build();
+
+ ModuleDescriptor descriptor2 = newBuilder("m2")
+ .requires(Set.of(Requires.Modifier.TRANSITIVE), "m1")
+ .build();
+
+ ModuleFinder finder1 = ModuleUtils.finderOf(descriptor1, descriptor2);
+
+ Configuration cf1 = resolve(finder1, "m2");
+
+ ClassLoader cl1 = new ClassLoader() { };
+ ModuleLayer layer1 = ModuleLayer.empty().defineModules(cf1, mn -> cl1);
+
+
+ // cf2: m3 requires transitive m2, m4 requires m3
+
+ ModuleDescriptor descriptor3 = newBuilder("m3")
+ .requires(Set.of(Requires.Modifier.TRANSITIVE), "m2")
+ .build();
+
+ ModuleDescriptor descriptor4 = newBuilder("m4")
+ .requires("m3")
+ .build();
+
+
+ ModuleFinder finder2 = ModuleUtils.finderOf(descriptor3, descriptor4);
+
+ Configuration cf2 = resolve(cf1, finder2, "m3", "m4");
+
+ ClassLoader cl2 = new ClassLoader() { };
+ ModuleLayer layer2 = layer1.defineModules(cf2, mn -> cl2);
+
+ assertTrue(layer1.parents().size() == 1);
+ assertTrue(layer1.parents().get(0) == ModuleLayer.empty());
+
+ assertTrue(layer2.parents().size() == 1);
+ assertTrue(layer2.parents().get(0) == layer1);
+
+ Module m1 = layer2.findModule("m1").get();
+ Module m2 = layer2.findModule("m2").get();
+ Module m3 = layer2.findModule("m3").get();
+ Module m4 = layer2.findModule("m4").get();
+
+ assertTrue(m1.getLayer() == layer1);
+ assertTrue(m2.getLayer() == layer1);
+ assertTrue(m3.getLayer() == layer2);
+ assertTrue(m4.getLayer() == layer2);
+
+ assertTrue(m1.canRead(m1));
+ assertFalse(m1.canRead(m2));
+ assertFalse(m1.canRead(m3));
+ assertFalse(m1.canRead(m4));
+
+ assertTrue(m2.canRead(m1));
+ assertTrue(m2.canRead(m2));
+ assertFalse(m1.canRead(m3));
+ assertFalse(m1.canRead(m4));
+
+ assertTrue(m3.canRead(m1));
+ assertTrue(m3.canRead(m2));
+ assertTrue(m3.canRead(m3));
+ assertFalse(m3.canRead(m4));
+
+ assertTrue(m4.canRead(m1));
+ assertTrue(m4.canRead(m2));
+ assertTrue(m4.canRead(m3));
+ assertTrue(m4.canRead(m4));
+ }
+
+
+ /**
+ * Test layers with a qualified export. The module exporting the package
+ * does not read the target module.
+ *
+ * m1 { exports p to m2 }
+ * m2 { }
+ */
+ public void testQualifiedExports1() {
+ ModuleDescriptor descriptor1 = newBuilder("m1").
+ exports("p", Set.of("m2"))
+ .build();
+
+ ModuleDescriptor descriptor2 = newBuilder("m2")
+ .build();
+
+ ModuleFinder finder1 = ModuleUtils.finderOf(descriptor1, descriptor2);
+
+ Configuration cf = resolve(finder1, "m1", "m2");
+
+ ClassLoader cl = new ClassLoader() { };
+ ModuleLayer layer = ModuleLayer.empty().defineModules(cf, mn -> cl);
+ assertTrue(layer.modules().size() == 2);
+
+ Module m1 = layer.findModule("m1").get();
+ Module m2 = layer.findModule("m2").get();
+
+ // check m1 exports p to m2
+ assertFalse(m1.isExported("p"));
+ assertTrue(m1.isExported("p", m2));
+ assertFalse(m1.isOpen("p", m2));
+ }
+
+
+ /**
+ * Test layers with a qualified export. The module exporting the package
+ * reads the target module.
+ *
+ * m1 { exports p to m2; }
+ * m2 { requires m1; }
+ */
+ public void testQualifiedExports2() {
+ ModuleDescriptor descriptor1 = newBuilder("m1")
+ .exports("p", Set.of("m2"))
+ .build();
+
+ ModuleDescriptor descriptor2 = newBuilder("m2")
+ .requires("m1")
+ .build();
+
+ ModuleFinder finder1 = ModuleUtils.finderOf(descriptor1, descriptor2);
+
+ Configuration cf = resolve(finder1, "m2");
+ ClassLoader cl = new ClassLoader() { };
+ ModuleLayer layer = ModuleLayer.empty().defineModules(cf, mn -> cl);
+ assertTrue(layer.modules().size() == 2);
+
+ Module m1 = layer.findModule("m1").get();
+ Module m2 = layer.findModule("m2").get();
+
+ // check m1 exports p to m2
+ assertFalse(m1.isExported("p"));
+ assertTrue(m1.isExported("p", m2));
+ assertFalse(m1.isOpen("p", m2));
+ }
+
+
+ /**
+ * Test layers with a qualified export. The module exporting the package
+ * does not read the target module in the parent layer.
+ *
+ * - Configuration/layer1: m1 { }
+ * - Configuration/layer2: m2 { exports p to m1; }
+ */
+ public void testQualifiedExports3() {
+ // create layer1 with m1
+ ModuleDescriptor descriptor1 = newBuilder("m1").build();
+ ModuleFinder finder1 = ModuleUtils.finderOf(descriptor1);
+ Configuration cf1 = resolve(finder1, "m1");
+ ClassLoader cl1 = new ClassLoader() { };
+ ModuleLayer layer1 = ModuleLayer.empty().defineModules(cf1, mn -> cl1);
+ assertTrue(layer1.modules().size() == 1);
+
+ // create layer2 with m2
+ ModuleDescriptor descriptor2 = newBuilder("m2")
+ .exports("p", Set.of("m1"))
+ .build();
+ ModuleFinder finder2 = ModuleUtils.finderOf(descriptor2);
+ Configuration cf2 = resolve(cf1, finder2, "m2");
+ ClassLoader cl2 = new ClassLoader() { };
+ ModuleLayer layer2 = layer1.defineModules(cf2, mn -> cl2);
+ assertTrue(layer2.modules().size() == 1);
+
+ Module m1 = layer1.findModule("m1").get();
+ Module m2 = layer2.findModule("m2").get();
+
+ // check m2 exports p to layer1/m1
+ assertFalse(m2.isExported("p"));
+ assertTrue(m2.isExported("p", m1));
+ assertFalse(m2.isOpen("p", m1));
+ }
+
+
+ /**
+ * Test layers with a qualified export. The module exporting the package
+ * reads the target module in the parent layer.
+ *
+ * - Configuration/layer1: m1 { }
+ * - Configuration/layer2: m2 { requires m1; exports p to m1; }
+ */
+ public void testQualifiedExports4() {
+ // create layer1 with m1
+ ModuleDescriptor descriptor1 = newBuilder("m1").build();
+ ModuleFinder finder1 = ModuleUtils.finderOf(descriptor1);
+ Configuration cf1 = resolve(finder1, "m1");
+ ClassLoader cl1 = new ClassLoader() { };
+ ModuleLayer layer1 = ModuleLayer.empty().defineModules(cf1, mn -> cl1);
+ assertTrue(layer1.modules().size() == 1);
+
+ // create layer2 with m2
+ ModuleDescriptor descriptor2 = newBuilder("m2")
+ .requires("m1")
+ .exports("p", Set.of("m1"))
+ .build();
+ ModuleFinder finder2 = ModuleUtils.finderOf(descriptor2);
+ Configuration cf2 = resolve(cf1, finder2, "m2");
+ ClassLoader cl2 = new ClassLoader() { };
+ ModuleLayer layer2 = layer1.defineModules(cf2, mn -> cl2);
+ assertTrue(layer2.modules().size() == 1);
+
+ Module m1 = layer1.findModule("m1").get();
+ Module m2 = layer2.findModule("m2").get();
+
+ // check m2 exports p to layer1/m1
+ assertFalse(m2.isExported("p"));
+ assertTrue(m2.isExported("p", m1));
+ assertFalse(m2.isOpen("p", m1));
+ }
+
+ /**
+ * Test layers with a qualified export. The module exporting the package
+ * does not read the target module.
+ *
+ * - Configuration/layer1: m1
+ * - Configuration/layer2: m1, m2 { exports p to m1; }
+ */
+ public void testQualifiedExports5() {
+ // create layer1 with m1
+ ModuleDescriptor descriptor1 = newBuilder("m1").build();
+ ModuleFinder finder1 = ModuleUtils.finderOf(descriptor1);
+ Configuration cf1 = resolve(finder1, "m1");
+ ClassLoader cl1 = new ClassLoader() { };
+ ModuleLayer layer1 = ModuleLayer.empty().defineModules(cf1, mn -> cl1);
+ assertTrue(layer1.modules().size() == 1);
+
+ // create layer2 with m1 and m2
+ ModuleDescriptor descriptor2 = newBuilder("m2").exports("p", Set.of("m1")).build();
+ ModuleFinder finder2 = ModuleUtils.finderOf(descriptor1, descriptor2);
+ Configuration cf2 = resolve(cf1, finder2, "m1", "m2");
+ ClassLoader cl2 = new ClassLoader() { };
+ ModuleLayer layer2 = layer1.defineModules(cf2, mn -> cl2);
+ assertTrue(layer2.modules().size() == 2);
+
+ Module m1_v1 = layer1.findModule("m1").get();
+ Module m1_v2 = layer2.findModule("m1").get();
+ Module m2 = layer2.findModule("m2").get();
+
+ // check m2 exports p to layer2/m2
+ assertFalse(m2.isExported("p"));
+ assertTrue(m2.isExported("p", m1_v2));
+ assertFalse(m2.isExported("p", m1_v1));
+ }
+
+
+ /**
+ * Test layers with a qualified export. The module exporting the package
+ * reads the target module in the parent layer (due to requires transitive).
+ *
+ * - Configuration/layer1: m1, m2 { requires transitive m1; }
+ * - Configuration/layer2: m1, m3 { requires m2; exports p to m1; }
+ */
+ public void testQualifiedExports6() {
+ // create layer1 with m1 and m2
+ ModuleDescriptor descriptor1 = newBuilder("m1").build();
+ ModuleDescriptor descriptor2 = newBuilder("m2")
+ .requires(Set.of(Requires.Modifier.TRANSITIVE), "m1")
+ .build();
+ ModuleFinder finder1 = ModuleUtils.finderOf(descriptor1, descriptor2);
+ Configuration cf1 = resolve(finder1, "m2");
+ ClassLoader loader1 = new ClassLoader() { };
+ ModuleLayer layer1 = ModuleLayer.empty().defineModules(cf1, mn -> loader1);
+ assertTrue(layer1.modules().size() == 2);
+
+ // create layer2 with m1 and m3
+ ModuleDescriptor descriptor3 = newBuilder("m3")
+ .requires("m2")
+ .exports("p", Set.of("m1"))
+ .build();
+ ModuleFinder finder2 = ModuleUtils.finderOf(descriptor1, descriptor3);
+ Configuration cf2 = resolve(cf1, finder2, "m1", "m3");
+ ClassLoader loader2 = new ClassLoader() { };
+ ModuleLayer layer2 = layer1.defineModules(cf2, mn -> loader2);
+ assertTrue(layer2.modules().size() == 2);
+
+ Module m1_v1 = layer1.findModule("m1").get();
+ Module m2 = layer1.findModule("m2").get();
+
+ Module m1_v2 = layer2.findModule("m1").get();
+ Module m3 = layer2.findModule("m3").get();
+
+ assertTrue(m3.canRead(m1_v1));
+ assertFalse(m3.canRead(m1_v2));
+
+ assertFalse(m3.isExported("p"));
+ assertTrue(m3.isExported("p", m1_v1));
+ assertFalse(m3.isExported("p", m1_v2));
+ assertFalse(m3.isExported("p", m2));
+ }
+
+
+ /**
+ * Test layers with a qualified export. The target module is not in any layer.
+ *
+ * - Configuration/layer1: m1 { }
+ * - Configuration/layer2: m2 { exports p to m3; }
+ */
+ public void testQualifiedExports7() {
+ // create layer1 with m1
+ ModuleDescriptor descriptor1 = newBuilder("m1").build();
+ ModuleFinder finder1 = ModuleUtils.finderOf(descriptor1);
+ Configuration cf1 = resolve(finder1, "m1");
+ ClassLoader cl1 = new ClassLoader() { };
+ ModuleLayer layer1 = ModuleLayer.empty().defineModules(cf1, mn -> cl1);
+ assertTrue(layer1.modules().size() == 1);
+
+ // create layer2 with m2
+ ModuleDescriptor descriptor2 = newBuilder("m2")
+ .exports("p", Set.of("m3"))
+ .build();
+ ModuleFinder finder2 = ModuleUtils.finderOf(descriptor2);
+ Configuration cf2 = resolve(cf1, finder2, "m2");
+ ClassLoader cl2 = new ClassLoader() { };
+ ModuleLayer layer2 = layer1.defineModules(cf2, mn -> cl2);
+ assertTrue(layer2.modules().size() == 1);
+
+ Module m1 = layer1.findModule("m1").get();
+ Module m2 = layer2.findModule("m2").get();
+
+ // check m2 does not export p to anyone
+ assertFalse(m2.isExported("p"));
+ assertFalse(m2.isExported("p", m1));
+ }
+
+ /**
+ * Attempt to use defineModules to create a layer with a module defined
+ * to a class loader that already has a module of the same name defined
+ * to the class loader.
+ */
+ @Test(expectedExceptions = { LayerInstantiationException.class })
+ public void testModuleAlreadyDefinedToLoader() {
+
+ ModuleDescriptor md = newBuilder("m")
+ .requires("java.base")
+ .build();
+
+ ModuleFinder finder = ModuleUtils.finderOf(md);
+
+ Configuration parent = ModuleLayer.boot().configuration();
+
+ Configuration cf = parent.resolve(finder, ModuleFinder.of(), Set.of("m"));
+
+ ClassLoader loader = new ClassLoader() { };
+
+ ModuleLayer.boot().defineModules(cf, mn -> loader);
+
+ // should throw LayerInstantiationException as m1 already defined to loader
+ ModuleLayer.boot().defineModules(cf, mn -> loader);
+
+ }
+
+
+ /**
+ * Attempt to use defineModules to create a layer with a module containing
+ * package {@code p} where the class loader already has a module defined
+ * to it containing package {@code p}.
+ */
+ @Test(expectedExceptions = { LayerInstantiationException.class })
+ public void testPackageAlreadyInNamedModule() {
+
+ ModuleDescriptor md1 = newBuilder("m1")
+ .packages(Set.of("p"))
+ .requires("java.base")
+ .build();
+
+ ModuleDescriptor md2 = newBuilder("m2")
+ .packages(Set.of("p"))
+ .requires("java.base")
+ .build();
+
+ ModuleFinder finder = ModuleUtils.finderOf(md1, md2);
+
+ ClassLoader loader = new ClassLoader() { };
+
+ // define m1 containing package p to class loader
+
+ Configuration parent = ModuleLayer.boot().configuration();
+
+ Configuration cf1 = parent.resolve(finder, ModuleFinder.of(), Set.of("m1"));
+
+ ModuleLayer layer1 = ModuleLayer.boot().defineModules(cf1, mn -> loader);
+
+ // attempt to define m2 containing package p to class loader
+
+ Configuration cf2 = parent.resolve(finder, ModuleFinder.of(), Set.of("m2"));
+
+ // should throw exception because p already in m1
+ ModuleLayer layer2 = ModuleLayer.boot().defineModules(cf2, mn -> loader);
+
+ }
+
+
+ /**
+ * Attempt to use defineModules to create a layer with a module
+ * containing a package in which a type is already loaded by the class
+ * loader.
+ */
+ @Test(expectedExceptions = { LayerInstantiationException.class })
+ public void testPackageAlreadyInUnnamedModule() throws Exception {
+
+ Class<?> c = layertest.Test.class;
+ assertFalse(c.getModule().isNamed()); // in unnamed module
+
+ ModuleDescriptor md = newBuilder("m")
+ .packages(Set.of(c.getPackageName()))
+ .requires("java.base")
+ .build();
+
+ ModuleFinder finder = ModuleUtils.finderOf(md);
+
+ Configuration parent = ModuleLayer.boot().configuration();
+ Configuration cf = parent.resolve(finder, ModuleFinder.of(), Set.of("m"));
+
+ ModuleLayer.boot().defineModules(cf, mn -> c.getClassLoader());
+ }
+
+
+ /**
+ * Attempt to create a layer with a module named "java.base".
+ */
+ public void testLayerWithJavaBase() {
+ ModuleDescriptor descriptor = newBuilder("java.base")
+ .exports("java.lang")
+ .build();
+
+ ModuleFinder finder = ModuleUtils.finderOf(descriptor);
+
+ Configuration cf = ModuleLayer.boot()
+ .configuration()
+ .resolve(finder, ModuleFinder.of(), Set.of("java.base"));
+ assertTrue(cf.modules().size() == 1);
+
+ ClassLoader scl = ClassLoader.getSystemClassLoader();
+
+ try {
+ ModuleLayer.boot().defineModules(cf, mn -> new ClassLoader() { });
+ assertTrue(false);
+ } catch (LayerInstantiationException e) { }
+
+ try {
+ ModuleLayer.boot().defineModulesWithOneLoader(cf, scl);
+ assertTrue(false);
+ } catch (LayerInstantiationException e) { }
+
+ try {
+ ModuleLayer.boot().defineModulesWithManyLoaders(cf, scl);
+ assertTrue(false);
+ } catch (LayerInstantiationException e) { }
+ }
+
+
+ @DataProvider(name = "javaPackages")
+ public Object[][] javaPackages() {
+ return new Object[][] { { "m1", "java" }, { "m2", "java.x" } };
+ }
+
+ /**
+ * Attempt to create a layer with a module containing a "java" package.
+ * This should only be allowed when the module is defined to the platform
+ * class loader.
+ */
+ @Test(dataProvider = "javaPackages")
+ public void testLayerWithJavaPackage(String mn, String pn) {
+ ModuleDescriptor descriptor = newBuilder(mn).packages(Set.of(pn)).build();
+ ModuleFinder finder = ModuleUtils.finderOf(descriptor);
+
+ Configuration cf = ModuleLayer.boot()
+ .configuration()
+ .resolve(finder, ModuleFinder.of(), Set.of(mn));
+ assertTrue(cf.modules().size() == 1);
+
+ ClassLoader pcl = ClassLoader.getPlatformClassLoader();
+ ClassLoader scl = ClassLoader.getSystemClassLoader();
+
+ try {
+ ModuleLayer.boot().defineModules(cf, _mn -> new ClassLoader() { });
+ assertTrue(false);
+ } catch (LayerInstantiationException e) { }
+
+ try {
+ ModuleLayer.boot().defineModulesWithOneLoader(cf, scl);
+ assertTrue(false);
+ } catch (LayerInstantiationException e) { }
+
+ try {
+ ModuleLayer.boot().defineModulesWithManyLoaders(cf, scl);
+ assertTrue(false);
+ } catch (LayerInstantiationException e) { }
+
+ // create layer with module defined to platform class loader
+ ModuleLayer layer = ModuleLayer.boot().defineModules(cf, _mn -> pcl);
+ Optional<Module> om = layer.findModule(mn);
+ assertTrue(om.isPresent());
+ Module foo = om.get();
+ assertTrue(foo.getClassLoader() == pcl);
+ assertTrue(foo.getPackages().size() == 1);
+ assertTrue(foo.getPackages().iterator().next().equals(pn));
+ }
+
+
+ /**
+ * Attempt to create a layer with a module defined to the boot loader
+ */
+ @Test(expectedExceptions = { LayerInstantiationException.class })
+ public void testLayerWithBootLoader() {
+ ModuleDescriptor descriptor = newBuilder("m1")
+ .build();
+
+ ModuleFinder finder = ModuleUtils.finderOf(descriptor);
+
+ Configuration cf = ModuleLayer.boot()
+ .configuration()
+ .resolve(finder, ModuleFinder.of(), Set.of("m1"));
+ assertTrue(cf.modules().size() == 1);
+
+ ModuleLayer.boot().defineModules(cf, mn -> null );
+ }
+
+
+ /**
+ * Parent of configuration != configuration of parent layer
+ */
+ @Test(expectedExceptions = { IllegalArgumentException.class })
+ public void testIncorrectParent1() {
+ ModuleDescriptor descriptor1 = newBuilder("m1")
+ .requires("java.base")
+ .build();
+
+ ModuleFinder finder = ModuleUtils.finderOf(descriptor1);
+
+ Configuration parent = ModuleLayer.boot().configuration();
+ Configuration cf = parent.resolve(finder, ModuleFinder.of(), Set.of("m1"));
+
+ ClassLoader loader = new ClassLoader() { };
+ ModuleLayer.empty().defineModules(cf, mn -> loader);
+ }
+
+
+ /**
+ * Parent of configuration != configuration of parent layer
+ */
+ @Test(expectedExceptions = { IllegalArgumentException.class })
+ public void testIncorrectParent2() {
+ ModuleDescriptor descriptor1 = newBuilder("m1").build();
+
+ ModuleFinder finder = ModuleUtils.finderOf(descriptor1);
+
+ Configuration cf = resolve(finder, "m1");
+
+ ClassLoader loader = new ClassLoader() { };
+ ModuleLayer.boot().defineModules(cf, mn -> loader);
+ }
+
+
+ // null handling
+
+ @Test(expectedExceptions = { NullPointerException.class })
+ public void testCreateWithNull1() {
+ ClassLoader loader = new ClassLoader() { };
+ ModuleLayer.empty().defineModules(null, mn -> loader);
+ }
+
+ @Test(expectedExceptions = { NullPointerException.class })
+ public void testCreateWithNull2() {
+ Configuration cf = resolve(ModuleLayer.boot().configuration(), ModuleFinder.of());
+ ModuleLayer.boot().defineModules(cf, null);
+ }
+
+ @Test(expectedExceptions = { NullPointerException.class })
+ public void testCreateWithNull3() {
+ ClassLoader scl = ClassLoader.getSystemClassLoader();
+ ModuleLayer.empty().defineModulesWithOneLoader(null, scl);
+ }
+
+ @Test(expectedExceptions = { NullPointerException.class })
+ public void testCreateWithNull4() {
+ ClassLoader scl = ClassLoader.getSystemClassLoader();
+ ModuleLayer.empty().defineModulesWithManyLoaders(null, scl);
+ }
+
+ @Test(expectedExceptions = { NullPointerException.class })
+ public void testFindModuleWithNull() {
+ ModuleLayer.boot().findModule(null);
+ }
+
+ @Test(expectedExceptions = { NullPointerException.class })
+ public void testFindLoaderWithNull() {
+ ModuleLayer.boot().findLoader(null);
+ }
+
+
+ // immutable sets
+
+ @Test(expectedExceptions = { UnsupportedOperationException.class })
+ public void testImmutableSet() {
+ Module base = Object.class.getModule();
+ ModuleLayer.boot().modules().add(base);
+ }
+
+
+ /**
+ * Resolve the given modules, by name, and returns the resulting
+ * Configuration.
+ */
+ private static Configuration resolve(Configuration cf,
+ ModuleFinder finder,
+ String... roots) {
+ return cf.resolve(finder, ModuleFinder.of(), Set.of(roots));
+ }
+
+ private static Configuration resolve(ModuleFinder finder,
+ String... roots) {
+ return resolve(Configuration.empty(), finder, roots);
+ }
+}