77 lines
3.4 KiB
Java
77 lines
3.4 KiB
Java
/*
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* Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import org.testng.annotations.Test;
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import java.io.IOException;
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import java.io.InputStream;
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import java.lang.module.ModuleDescriptor;
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import java.util.Set;
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import static org.testng.Assert.assertEquals;
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import static org.testng.Assert.assertNotSame;
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/**
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* @test
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* @bug 8275509
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* @run testng ModuleDescriptorHashCodeTest
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* @run testng/othervm -Xshare:off ModuleDescriptorHashCodeTest
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* @summary Tests the ModuleDescriptor.hashCode() for boot layer modules
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*/
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public class ModuleDescriptorHashCodeTest {
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/**
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* Verifies that the ModuleDescriptor.hashCode() returned by a boot layer module is
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* the same as that returned by a ModuleDescriptor constructed from the ModuleDescriptor.Builder
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* for the same module.
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*/
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@Test
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public void testBootModuleDescriptor() throws Exception {
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Set<Module> bootModules = ModuleLayer.boot().modules();
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for (Module bootModule : bootModules) {
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System.out.println("Testing module descriptor of boot module " + bootModule);
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ModuleDescriptor bootMD = bootModule.getDescriptor();
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ModuleDescriptor mdFromBuilder = fromModuleInfoClass(bootModule);
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// verify that this object is indeed a different object instance than the boot module descriptor
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// to prevent any artificial passing of the test
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assertNotSame(mdFromBuilder, bootMD, "ModuleDescriptor loaded from boot layer and " +
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"one created from module-info.class unexpectedly returned the same instance");
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assertEquals(mdFromBuilder.hashCode(), bootMD.hashCode(),
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"Unexpected ModuleDescriptor.hashCode() for " + mdFromBuilder);
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assertEquals(mdFromBuilder.compareTo(bootMD), 0,
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"Unexpected ModuleDescriptor.compareTo() for " + mdFromBuilder);
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}
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}
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// Returns a ModuleDescriptor parsed out of the module-info.class of the passed Module
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private static ModuleDescriptor fromModuleInfoClass(Module module) throws IOException {
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try (InputStream moduleInfo = module.getResourceAsStream("module-info.class")) {
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if (moduleInfo == null) {
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throw new RuntimeException("Could not locate module-info.class in " + module);
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}
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// internally calls ModuleDescriptor.Builder
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return ModuleDescriptor.read(moduleInfo);
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}
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}
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}
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