--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/lang/module/ModuleFinderTest.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,828 @@
+/*
+ * Copyright (c) 2015, 2016, 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
+ * @modules java.base/jdk.internal.module
+ * @build ModuleFinderTest
+ * @run testng ModuleFinderTest
+ * @summary Basic tests for java.lang.module.ModuleFinder
+ */
+
+import java.io.File;
+import java.io.OutputStream;
+import java.lang.module.FindException;
+import java.lang.module.InvalidModuleDescriptorException;
+import java.lang.module.ModuleDescriptor;
+import java.lang.module.ModuleFinder;
+import java.lang.module.ModuleReference;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Optional;
+import java.util.Set;
+import java.util.jar.JarEntry;
+import java.util.jar.JarOutputStream;
+import java.util.stream.Collectors;
+
+import jdk.internal.module.ModuleInfoWriter;
+
+import org.testng.annotations.Test;
+import static org.testng.Assert.*;
+
+@Test
+public class ModuleFinderTest {
+
+ private static final Path USER_DIR
+ = Paths.get(System.getProperty("user.dir"));
+
+
+ /**
+ * Test ModuleFinder.ofSystem
+ */
+ public void testOfSystem() {
+ ModuleFinder finder = ModuleFinder.ofSystem();
+
+ assertTrue(finder.find("java.se").isPresent());
+ assertTrue(finder.find("java.base").isPresent());
+ assertFalse(finder.find("java.rhubarb").isPresent());
+
+ Set<String> names = finder.findAll().stream()
+ .map(ModuleReference::descriptor)
+ .map(ModuleDescriptor::name)
+ .collect(Collectors.toSet());
+ assertTrue(names.contains("java.se"));
+ assertTrue(names.contains("java.base"));
+ assertFalse(names.contains("java.rhubarb"));
+ }
+
+
+ /**
+ * Test ModuleFinder.of with no entries
+ */
+ public void testOfNoEntries() {
+ ModuleFinder finder = ModuleFinder.of();
+ assertTrue(finder.findAll().isEmpty());
+ assertFalse(finder.find("java.rhubarb").isPresent());
+ }
+
+
+ /**
+ * Test ModuleFinder.of with one directory of modules
+ */
+ public void testOfOneDirectory() throws Exception {
+ Path dir = Files.createTempDirectory(USER_DIR, "mods");
+ createExplodedModule(dir.resolve("m1"), "m1");
+ createModularJar(dir.resolve("m2.jar"), "m2");
+
+ ModuleFinder finder = ModuleFinder.of(dir);
+ assertTrue(finder.findAll().size() == 2);
+ assertTrue(finder.find("m1").isPresent());
+ assertTrue(finder.find("m2").isPresent());
+ assertFalse(finder.find("java.rhubarb").isPresent());
+ }
+
+
+ /**
+ * Test ModuleFinder.of with two directories
+ */
+ public void testOfTwoDirectories() throws Exception {
+ Path dir1 = Files.createTempDirectory(USER_DIR, "mods1");
+ createExplodedModule(dir1.resolve("m1"), "m1@1.0");
+ createModularJar(dir1.resolve("m2.jar"), "m2@1.0");
+
+ Path dir2 = Files.createTempDirectory(USER_DIR, "mods2");
+ createExplodedModule(dir2.resolve("m1"), "m1@2.0");
+ createModularJar(dir2.resolve("m2.jar"), "m2@2.0");
+ createExplodedModule(dir2.resolve("m3"), "m3");
+ createModularJar(dir2.resolve("m4.jar"), "m4");
+
+ ModuleFinder finder = ModuleFinder.of(dir1, dir2);
+ assertTrue(finder.findAll().size() == 4);
+ assertTrue(finder.find("m1").isPresent());
+ assertTrue(finder.find("m2").isPresent());
+ assertTrue(finder.find("m3").isPresent());
+ assertTrue(finder.find("m4").isPresent());
+ assertFalse(finder.find("java.rhubarb").isPresent());
+
+ // check that m1@1.0 (and not m1@2.0) is found
+ ModuleDescriptor m1 = finder.find("m1").get().descriptor();
+ assertEquals(m1.version().get().toString(), "1.0");
+
+ // check that m2@1.0 (and not m2@2.0) is found
+ ModuleDescriptor m2 = finder.find("m2").get().descriptor();
+ assertEquals(m2.version().get().toString(), "1.0");
+ }
+
+
+ /**
+ * Test ModuleFinder.of with one JAR file
+ */
+ public void testOfOneJarFile() throws Exception {
+ Path dir = Files.createTempDirectory(USER_DIR, "mods");
+ Path jar1 = createModularJar(dir.resolve("m1.jar"), "m1");
+
+ ModuleFinder finder = ModuleFinder.of(jar1);
+ assertTrue(finder.findAll().size() == 1);
+ assertTrue(finder.find("m1").isPresent());
+ assertFalse(finder.find("java.rhubarb").isPresent());
+ }
+
+
+ /**
+ * Test ModuleFinder.of with two JAR files
+ */
+ public void testOfTwoJarFiles() throws Exception {
+ Path dir = Files.createTempDirectory(USER_DIR, "mods");
+
+ Path jar1 = createModularJar(dir.resolve("m1.jar"), "m1");
+ Path jar2 = createModularJar(dir.resolve("m2.jar"), "m2");
+
+ ModuleFinder finder = ModuleFinder.of(jar1, jar2);
+ assertTrue(finder.findAll().size() == 2);
+ assertTrue(finder.find("m1").isPresent());
+ assertTrue(finder.find("m2").isPresent());
+ assertFalse(finder.find("java.rhubarb").isPresent());
+ }
+
+
+ /**
+ * Test ModuleFinder.of with many JAR files
+ */
+ public void testOfManyJarFiles() throws Exception {
+ Path dir = Files.createTempDirectory(USER_DIR, "mods");
+
+ Path jar1 = createModularJar(dir.resolve("m1@1.0.jar"), "m1@1.0");
+ Path jar2 = createModularJar(dir.resolve("m2@1.0.jar"), "m2");
+ Path jar3 = createModularJar(dir.resolve("m1@2.0.jar"), "m1@2.0"); // shadowed
+ Path jar4 = createModularJar(dir.resolve("m3@1.0.jar"), "m3");
+
+ ModuleFinder finder = ModuleFinder.of(jar1, jar2, jar3, jar4);
+ assertTrue(finder.findAll().size() == 3);
+ assertTrue(finder.find("m1").isPresent());
+ assertTrue(finder.find("m2").isPresent());
+ assertTrue(finder.find("m3").isPresent());
+ assertFalse(finder.find("java.rhubarb").isPresent());
+
+ // check that m1@1.0 (and not m1@2.0) is found
+ ModuleDescriptor m1 = finder.find("m1").get().descriptor();
+ assertEquals(m1.version().get().toString(), "1.0");
+ }
+
+
+ /**
+ * Test ModuleFinder.of with one exploded module.
+ */
+ public void testOfOneExplodedModule() throws Exception {
+ Path dir = Files.createTempDirectory(USER_DIR, "mods");
+ Path m1_dir = createExplodedModule(dir.resolve("m1"), "m1");
+
+ ModuleFinder finder = ModuleFinder.of(m1_dir);
+ assertTrue(finder.findAll().size() == 1);
+ assertTrue(finder.find("m1").isPresent());
+ assertFalse(finder.find("java.rhubarb").isPresent());
+ }
+
+
+ /**
+ * Test ModuleFinder.of with two exploded modules.
+ */
+ public void testOfTwoExplodedModules() throws Exception {
+ Path dir = Files.createTempDirectory(USER_DIR, "mods");
+ Path m1_dir = createExplodedModule(dir.resolve("m1"), "m1");
+ Path m2_dir = createExplodedModule(dir.resolve("m2"), "m2");
+
+ ModuleFinder finder = ModuleFinder.of(m1_dir, m2_dir);
+ assertTrue(finder.findAll().size() == 2);
+ assertTrue(finder.find("m1").isPresent());
+ assertTrue(finder.find("m2").isPresent());
+ assertFalse(finder.find("java.rhubarb").isPresent());
+ }
+
+
+ /**
+ * Test ModuleFinder.of with a mix of module directories and JAR files.
+ */
+ public void testOfMixDirectoriesAndJars() throws Exception {
+
+ // directory with m1@1.0 and m2@1.0
+ Path dir1 = Files.createTempDirectory(USER_DIR, "mods1");
+ createExplodedModule(dir1.resolve("m1"), "m1@1.0");
+ createModularJar(dir1.resolve("m2.jar"), "m2@1.0");
+
+ // JAR files: m1@2.0, m2@2.0, m3@2.0, m4@2.0
+ Path dir2 = Files.createTempDirectory(USER_DIR, "mods2");
+ Path jar1 = createModularJar(dir2.resolve("m1.jar"), "m1@2.0");
+ Path jar2 = createModularJar(dir2.resolve("m2.jar"), "m2@2.0");
+ Path jar3 = createModularJar(dir2.resolve("m3.jar"), "m3@2.0");
+ Path jar4 = createModularJar(dir2.resolve("m4.jar"), "m4@2.0");
+
+ // directory with m3@3.0 and m4@3.0
+ Path dir3 = Files.createTempDirectory(USER_DIR, "mods3");
+ createExplodedModule(dir3.resolve("m3"), "m3@3.0");
+ createModularJar(dir3.resolve("m4.jar"), "m4@3.0");
+
+ // JAR files: m5 and m6
+ Path dir4 = Files.createTempDirectory(USER_DIR, "mods4");
+ Path jar5 = createModularJar(dir4.resolve("m5.jar"), "m5@4.0");
+ Path jar6 = createModularJar(dir4.resolve("m6.jar"), "m6@4.0");
+
+
+ ModuleFinder finder
+ = ModuleFinder.of(dir1, jar1, jar2, jar3, jar4, dir3, jar5, jar6);
+ assertTrue(finder.findAll().size() == 6);
+ assertTrue(finder.find("m1").isPresent());
+ assertTrue(finder.find("m2").isPresent());
+ assertTrue(finder.find("m3").isPresent());
+ assertTrue(finder.find("m4").isPresent());
+ assertTrue(finder.find("m5").isPresent());
+ assertTrue(finder.find("m6").isPresent());
+ assertFalse(finder.find("java.rhubarb").isPresent());
+
+ // m1 and m2 should be located in dir1
+ ModuleDescriptor m1 = finder.find("m1").get().descriptor();
+ assertEquals(m1.version().get().toString(), "1.0");
+ ModuleDescriptor m2 = finder.find("m2").get().descriptor();
+ assertEquals(m2.version().get().toString(), "1.0");
+
+ // m3 and m4 should be located in JAR files
+ ModuleDescriptor m3 = finder.find("m3").get().descriptor();
+ assertEquals(m3.version().get().toString(), "2.0");
+ ModuleDescriptor m4 = finder.find("m4").get().descriptor();
+ assertEquals(m4.version().get().toString(), "2.0");
+
+ // m5 and m6 should be located in JAR files
+ ModuleDescriptor m5 = finder.find("m5").get().descriptor();
+ assertEquals(m5.version().get().toString(), "4.0");
+ ModuleDescriptor m6 = finder.find("m6").get().descriptor();
+ assertEquals(m6.version().get().toString(), "4.0");
+ }
+
+
+ /**
+ * Test ModuleFinder.of with a mix of module directories and exploded
+ * modules.
+ */
+ public void testOfMixDirectoriesAndExplodedModules() throws Exception {
+ // directory with m1@1.0 and m2@1.0
+ Path dir1 = Files.createTempDirectory(USER_DIR, "mods1");
+ createExplodedModule(dir1.resolve("m1"), "m1@1.0");
+ createModularJar(dir1.resolve("m2.jar"), "m2@1.0");
+
+ // exploded modules: m1@2.0, m2@2.0, m3@2.0, m4@2.0
+ Path dir2 = Files.createTempDirectory(USER_DIR, "mods2");
+ Path m1_dir = createExplodedModule(dir2.resolve("m1"), "m1@2.0");
+ Path m2_dir = createExplodedModule(dir2.resolve("m2"), "m2@2.0");
+ Path m3_dir = createExplodedModule(dir2.resolve("m3"), "m3@2.0");
+ Path m4_dir = createExplodedModule(dir2.resolve("m4"), "m4@2.0");
+
+ ModuleFinder finder = ModuleFinder.of(dir1, m1_dir, m2_dir, m3_dir, m4_dir);
+ assertTrue(finder.findAll().size() == 4);
+ assertTrue(finder.find("m1").isPresent());
+ assertTrue(finder.find("m2").isPresent());
+ assertTrue(finder.find("m3").isPresent());
+ assertTrue(finder.find("m4").isPresent());
+ assertFalse(finder.find("java.rhubarb").isPresent());
+
+ // m1 and m2 should be located in dir1
+ ModuleDescriptor m1 = finder.find("m1").get().descriptor();
+ assertEquals(m1.version().get().toString(), "1.0");
+ ModuleDescriptor m2 = finder.find("m2").get().descriptor();
+ assertEquals(m2.version().get().toString(), "1.0");
+
+ // m3 and m4 should be located in dir2
+ ModuleDescriptor m3 = finder.find("m3").get().descriptor();
+ assertEquals(m3.version().get().toString(), "2.0");
+ ModuleDescriptor m4 = finder.find("m4").get().descriptor();
+ assertEquals(m4.version().get().toString(), "2.0");
+ }
+
+
+ /**
+ * Test ModuleFinder with a JAR file containing a mix of class and
+ * non-class resources.
+ */
+ public void testOfOneJarFileWithResources() throws Exception {
+ Path dir = Files.createTempDirectory(USER_DIR, "mods");
+ Path jar = createModularJar(dir.resolve("m.jar"), "m",
+ "LICENSE",
+ "README",
+ "WEB-INF/tags",
+ "p/Type.class",
+ "p/resources/m.properties",
+ "q-/Type.class", // not a legal package name
+ "q-/resources/m/properties");
+
+ ModuleFinder finder = ModuleFinder.of(jar);
+ Optional<ModuleReference> mref = finder.find("m");
+ assertTrue(mref.isPresent(), "m1 not found");
+
+ ModuleDescriptor descriptor = mref.get().descriptor();
+
+ assertTrue(descriptor.packages().size() == 2);
+ assertTrue(descriptor.packages().contains("p"));
+ assertTrue(descriptor.packages().contains("p.resources"));
+ }
+
+
+ /**
+ * Test ModuleFinder with an exploded module containing a mix of class
+ * and non-class resources
+ */
+ public void testOfOneExplodedModuleWithResources() throws Exception {
+ Path dir = Files.createTempDirectory(USER_DIR, "mods");
+ Path m_dir = createExplodedModule(dir.resolve("m"), "m",
+ "LICENSE",
+ "README",
+ "WEB-INF/tags",
+ "p/Type.class",
+ "p/resources/m.properties",
+ "q-/Type.class", // not a legal package name
+ "q-/resources/m/properties");
+
+ ModuleFinder finder = ModuleFinder.of(m_dir);
+ Optional<ModuleReference> mref = finder.find("m");
+ assertTrue(mref.isPresent(), "m not found");
+
+ ModuleDescriptor descriptor = mref.get().descriptor();
+
+ assertTrue(descriptor.packages().size() == 2);
+ assertTrue(descriptor.packages().contains("p"));
+ assertTrue(descriptor.packages().contains("p.resources"));
+ }
+
+
+ /**
+ * Test ModuleFinder with a JAR file containing a .class file in the top
+ * level directory.
+ */
+ public void testOfOneJarFileWithTopLevelClass() throws Exception {
+ Path dir = Files.createTempDirectory(USER_DIR, "mods");
+ Path jar = createModularJar(dir.resolve("m.jar"), "m", "Mojo.class");
+
+ ModuleFinder finder = ModuleFinder.of(jar);
+ try {
+ finder.find("m");
+ assertTrue(false);
+ } catch (FindException e) {
+ assertTrue(e.getCause() instanceof InvalidModuleDescriptorException);
+ assertTrue(e.getCause().getMessage().contains("Mojo.class"));
+ }
+
+ finder = ModuleFinder.of(jar);
+ try {
+ finder.findAll();
+ assertTrue(false);
+ } catch (FindException e) {
+ assertTrue(e.getCause() instanceof InvalidModuleDescriptorException);
+ assertTrue(e.getCause().getMessage().contains("Mojo.class"));
+ }
+ }
+
+ /**
+ * Test ModuleFinder with a JAR file containing a .class file in the top
+ * level directory.
+ */
+ public void testOfOneExplodedModuleWithTopLevelClass() throws Exception {
+ Path dir = Files.createTempDirectory(USER_DIR, "mods");
+ Path m_dir = createExplodedModule(dir.resolve("m"), "m", "Mojo.class");
+
+ ModuleFinder finder = ModuleFinder.of(m_dir);
+ try {
+ finder.find("m");
+ assertTrue(false);
+ } catch (FindException e) {
+ assertTrue(e.getCause() instanceof InvalidModuleDescriptorException);
+ assertTrue(e.getCause().getMessage().contains("Mojo.class"));
+ }
+
+ finder = ModuleFinder.of(m_dir);
+ try {
+ finder.findAll();
+ assertTrue(false);
+ } catch (FindException e) {
+ assertTrue(e.getCause() instanceof InvalidModuleDescriptorException);
+ assertTrue(e.getCause().getMessage().contains("Mojo.class"));
+ }
+ }
+
+
+ /**
+ * Test ModuleFinder.of with a path to a file that does not exist.
+ */
+ public void testOfWithDoesNotExistEntry() throws Exception {
+ Path dir1 = Files.createTempDirectory(USER_DIR, "mods1");
+
+ Path dir2 = Files.createTempDirectory(USER_DIR, "mods2");
+ createModularJar(dir2.resolve("m2.jar"), "m2@1.0");
+
+ Files.delete(dir1);
+
+ ModuleFinder finder = ModuleFinder.of(dir1, dir2);
+
+ assertTrue(finder.find("m2").isPresent());
+ assertTrue(finder.findAll().size() == 1);
+ assertFalse(finder.find("java.rhubarb").isPresent());
+ }
+
+
+ /**
+ * Test ModuleFinder.of with a file path to an unrecognized file type.
+ */
+ public void testOfWithUnrecognizedEntry() throws Exception {
+ Path dir = Files.createTempDirectory(USER_DIR, "mods");
+ Path mod = Files.createTempFile(dir, "m", ".junk");
+
+ ModuleFinder finder = ModuleFinder.of(mod);
+ try {
+ finder.find("java.rhubarb");
+ assertTrue(false);
+ } catch (FindException e) {
+ // expected
+ }
+
+ finder = ModuleFinder.of(mod);
+ try {
+ finder.findAll();
+ assertTrue(false);
+ } catch (FindException e) {
+ // expected
+ }
+ }
+
+
+ /**
+ * Test ModuleFinder.of with a file path to a directory containing a file
+ * that will not be recognized as a module.
+ */
+ public void testOfWithUnrecognizedEntryInDirectory1() throws Exception {
+ Path dir = Files.createTempDirectory(USER_DIR, "mods");
+ Files.createTempFile(dir, "m", ".junk");
+
+ ModuleFinder finder = ModuleFinder.of(dir);
+ assertFalse(finder.find("java.rhubarb").isPresent());
+
+ finder = ModuleFinder.of(dir);
+ assertTrue(finder.findAll().isEmpty());
+ }
+
+
+ /**
+ * Test ModuleFinder.of with a file path to a directory containing a file
+ * that will not be recognized as a module.
+ */
+ public void testOfWithUnrecognizedEntryInDirectory2() throws Exception {
+ Path dir = Files.createTempDirectory(USER_DIR, "mods");
+ createModularJar(dir.resolve("m1.jar"), "m1");
+ Files.createTempFile(dir, "m2", ".junk");
+
+ ModuleFinder finder = ModuleFinder.of(dir);
+ assertTrue(finder.find("m1").isPresent());
+ assertFalse(finder.find("m2").isPresent());
+
+ finder = ModuleFinder.of(dir);
+ assertTrue(finder.findAll().size() == 1);
+ }
+
+
+ /**
+ * Test ModuleFinder.of with a directory that contains two
+ * versions of the same module
+ */
+ public void testOfDuplicateModulesInDirectory() throws Exception {
+ Path dir = Files.createTempDirectory(USER_DIR, "mods");
+ createModularJar(dir.resolve("m1@1.0.jar"), "m1");
+ createModularJar(dir.resolve("m1@2.0.jar"), "m1");
+
+ ModuleFinder finder = ModuleFinder.of(dir);
+ try {
+ finder.find("m1");
+ assertTrue(false);
+ } catch (FindException expected) { }
+
+ finder = ModuleFinder.of(dir);
+ try {
+ finder.findAll();
+ assertTrue(false);
+ } catch (FindException expected) { }
+ }
+
+
+ /**
+ * Test ModuleFinder.of with a directory containing hidden files
+ */
+ public void testOfWithHiddenFiles() throws Exception {
+ Path dir = Files.createTempDirectory(USER_DIR, "mods");
+ createExplodedModule(dir.resolve("m"), "m",
+ "com/.ignore",
+ "com/foo/.ignore",
+ "com/foo/foo.properties");
+
+ ModuleFinder finder = ModuleFinder.of(dir);
+ ModuleReference mref = finder.find("m").orElse(null);
+ assertNotNull(mref);
+
+ Set<String> expectedPackages;
+ if (System.getProperty("os.name").startsWith("Windows")) {
+ expectedPackages = Set.of("com", "com.foo");
+ } else {
+ expectedPackages = Set.of("com.foo");
+ }
+ assertEquals(mref.descriptor().packages(), expectedPackages);
+ }
+
+
+ /**
+ * Test ModuleFinder.of with a truncated module-info.class
+ */
+ public void testOfWithTruncatedModuleInfo() throws Exception {
+ Path dir = Files.createTempDirectory(USER_DIR, "mods");
+
+ // create an empty <dir>/rhubarb/module-info.class
+ Path subdir = Files.createDirectory(dir.resolve("rhubarb"));
+ Files.createFile(subdir.resolve("module-info.class"));
+
+ ModuleFinder finder = ModuleFinder.of(dir);
+ try {
+ finder.find("rhubarb");
+ assertTrue(false);
+ } catch (FindException e) {
+ assertTrue(e.getCause() instanceof InvalidModuleDescriptorException);
+ }
+
+ finder = ModuleFinder.of(dir);
+ try {
+ finder.findAll();
+ assertTrue(false);
+ } catch (FindException e) {
+ assertTrue(e.getCause() instanceof InvalidModuleDescriptorException);
+ }
+ }
+
+
+ /**
+ * Test ModuleFinder.compose with no module finders
+ */
+ public void testComposeOfNone() throws Exception {
+ ModuleFinder finder = ModuleFinder.of();
+ assertTrue(finder.findAll().isEmpty());
+ assertFalse(finder.find("java.rhubarb").isPresent());
+ }
+
+
+ /**
+ * Test ModuleFinder.compose with one module finder
+ */
+ public void testComposeOfOne() throws Exception {
+ Path dir = Files.createTempDirectory(USER_DIR, "mods");
+ createModularJar(dir.resolve("m1.jar"), "m1");
+ createModularJar(dir.resolve("m2.jar"), "m2");
+
+ ModuleFinder finder1 = ModuleFinder.of(dir);
+
+ ModuleFinder finder = ModuleFinder.compose(finder1);
+ assertTrue(finder.findAll().size() == 2);
+ assertTrue(finder.find("m1").isPresent());
+ assertTrue(finder.find("m2").isPresent());
+ assertFalse(finder.find("java.rhubarb").isPresent());
+ }
+
+
+ /**
+ * Test ModuleFinder.compose with two module finders
+ */
+ public void testComposeOfTwo() throws Exception {
+ Path dir1 = Files.createTempDirectory(USER_DIR, "mods1");
+ createModularJar(dir1.resolve("m1.jar"), "m1@1.0");
+ createModularJar(dir1.resolve("m2.jar"), "m2@1.0");
+
+ Path dir2 = Files.createTempDirectory(USER_DIR, "mods2");
+ createModularJar(dir2.resolve("m1.jar"), "m1@2.0");
+ createModularJar(dir2.resolve("m2.jar"), "m2@2.0");
+ createModularJar(dir2.resolve("m3.jar"), "m3");
+ createModularJar(dir2.resolve("m4.jar"), "m4");
+
+ ModuleFinder finder1 = ModuleFinder.of(dir1);
+ ModuleFinder finder2 = ModuleFinder.of(dir2);
+
+ ModuleFinder finder = ModuleFinder.compose(finder1, finder2);
+ assertTrue(finder.findAll().size() == 4);
+ assertTrue(finder.find("m1").isPresent());
+ assertTrue(finder.find("m2").isPresent());
+ assertTrue(finder.find("m3").isPresent());
+ assertTrue(finder.find("m4").isPresent());
+ assertFalse(finder.find("java.rhubarb").isPresent());
+
+ // check that m1@1.0 is found
+ ModuleDescriptor m1 = finder.find("m1").get().descriptor();
+ assertEquals(m1.version().get().toString(), "1.0");
+
+ // check that m2@1.0 is found
+ ModuleDescriptor m2 = finder.find("m2").get().descriptor();
+ assertEquals(m2.version().get().toString(), "1.0");
+ }
+
+
+ /**
+ * Test ModuleFinder.compose with three module finders
+ */
+ public void testComposeOfThree() throws Exception {
+ Path dir1 = Files.createTempDirectory(USER_DIR, "mods1");
+ createModularJar(dir1.resolve("m1.jar"), "m1@1.0");
+ createModularJar(dir1.resolve("m2.jar"), "m2@1.0");
+
+ Path dir2 = Files.createTempDirectory(USER_DIR, "mods2");
+ createModularJar(dir2.resolve("m1.jar"), "m1@2.0");
+ createModularJar(dir2.resolve("m2.jar"), "m2@2.0");
+ createModularJar(dir2.resolve("m3.jar"), "m3@2.0");
+ createModularJar(dir2.resolve("m4.jar"), "m4@2.0");
+
+ Path dir3 = Files.createTempDirectory(USER_DIR, "mods3");
+ createModularJar(dir3.resolve("m3.jar"), "m3@3.0");
+ createModularJar(dir3.resolve("m4.jar"), "m4@3.0");
+ createModularJar(dir3.resolve("m5.jar"), "m5");
+ createModularJar(dir3.resolve("m6.jar"), "m6");
+
+ ModuleFinder finder1 = ModuleFinder.of(dir1);
+ ModuleFinder finder2 = ModuleFinder.of(dir2);
+ ModuleFinder finder3 = ModuleFinder.of(dir3);
+
+ ModuleFinder finder = ModuleFinder.compose(finder1, finder2, finder3);
+ assertTrue(finder.findAll().size() == 6);
+ assertTrue(finder.find("m1").isPresent());
+ assertTrue(finder.find("m2").isPresent());
+ assertTrue(finder.find("m3").isPresent());
+ assertTrue(finder.find("m4").isPresent());
+ assertTrue(finder.find("m5").isPresent());
+ assertTrue(finder.find("m6").isPresent());
+ assertFalse(finder.find("java.rhubarb").isPresent());
+
+ // check that m1@1.0 is found
+ ModuleDescriptor m1 = finder.find("m1").get().descriptor();
+ assertEquals(m1.version().get().toString(), "1.0");
+
+ // check that m2@1.0 is found
+ ModuleDescriptor m2 = finder.find("m2").get().descriptor();
+ assertEquals(m2.version().get().toString(), "1.0");
+
+ // check that m3@2.0 is found
+ ModuleDescriptor m3 = finder.find("m3").get().descriptor();
+ assertEquals(m3.version().get().toString(), "2.0");
+
+ // check that m4@2.0 is found
+ ModuleDescriptor m4 = finder.find("m4").get().descriptor();
+ assertEquals(m4.version().get().toString(), "2.0");
+ }
+
+
+ /**
+ * Test null handling
+ */
+ public void testNulls() {
+
+ // ofSystem
+ try {
+ ModuleFinder.ofSystem().find(null);
+ assertTrue(false);
+ } catch (NullPointerException expected) { }
+
+ // of
+ Path dir = Paths.get("d");
+ try {
+ ModuleFinder.of().find(null);
+ assertTrue(false);
+ } catch (NullPointerException expected) { }
+ try {
+ ModuleFinder.of((Path)null);
+ assertTrue(false);
+ } catch (NullPointerException expected) { }
+ try {
+ ModuleFinder.of((Path[])null);
+ assertTrue(false);
+ } catch (NullPointerException expected) { }
+ try {
+ ModuleFinder.of(dir, null);
+ assertTrue(false);
+ } catch (NullPointerException expected) { }
+ try {
+ ModuleFinder.of(null, dir);
+ assertTrue(false);
+ } catch (NullPointerException expected) { }
+
+ // compose
+ ModuleFinder finder = ModuleFinder.of();
+ try {
+ ModuleFinder.compose((ModuleFinder)null);
+ assertTrue(false);
+ } catch (NullPointerException expected) { }
+ try {
+ ModuleFinder.compose((ModuleFinder[])null);
+ assertTrue(false);
+ } catch (NullPointerException expected) { }
+ try {
+ ModuleFinder.compose(finder, null);
+ assertTrue(false);
+ } catch (NullPointerException expected) { }
+ try {
+ ModuleFinder.compose(null, finder);
+ assertTrue(false);
+ } catch (NullPointerException expected) { }
+
+ }
+
+
+ /**
+ * Parses a string of the form {@code name[@version]} and returns a
+ * ModuleDescriptor with that name and version. The ModuleDescriptor
+ * will have a requires on java.base.
+ */
+ static ModuleDescriptor newModuleDescriptor(String mid) {
+ String mn;
+ String vs;
+ int i = mid.indexOf("@");
+ if (i == -1) {
+ mn = mid;
+ vs = null;
+ } else {
+ mn = mid.substring(0, i);
+ vs = mid.substring(i+1);
+ }
+ ModuleDescriptor.Builder builder
+ = ModuleDescriptor.newModule(mn).requires("java.base");
+ if (vs != null)
+ builder.version(vs);
+ return builder.build();
+ }
+
+ /**
+ * Creates an exploded module in the given directory and containing a
+ * module descriptor with the given module name/version.
+ */
+ static Path createExplodedModule(Path dir, String mid, String... entries)
+ throws Exception
+ {
+ ModuleDescriptor descriptor = newModuleDescriptor(mid);
+ Files.createDirectories(dir);
+ Path mi = dir.resolve("module-info.class");
+ try (OutputStream out = Files.newOutputStream(mi)) {
+ ModuleInfoWriter.write(descriptor, out);
+ }
+
+ for (String entry : entries) {
+ Path file = dir.resolve(entry.replace('/', File.separatorChar));
+ Files.createDirectories(file.getParent());
+ Files.createFile(file);
+ }
+
+ return dir;
+ }
+
+ /**
+ * Creates a JAR file with the given file path and containing a module
+ * descriptor with the given module name/version.
+ */
+ static Path createModularJar(Path file, String mid, String ... entries)
+ throws Exception
+ {
+ ModuleDescriptor descriptor = newModuleDescriptor(mid);
+ try (OutputStream out = Files.newOutputStream(file)) {
+ try (JarOutputStream jos = new JarOutputStream(out)) {
+
+ JarEntry je = new JarEntry("module-info.class");
+ jos.putNextEntry(je);
+ ModuleInfoWriter.write(descriptor, jos);
+ jos.closeEntry();
+
+ for (String entry : entries) {
+ je = new JarEntry(entry);
+ jos.putNextEntry(je);
+ jos.closeEntry();
+ }
+ }
+
+ }
+ return file;
+ }
+
+}
+