--- /dev/null 2018-06-17 23:18:20.806999507 +0800 +++ new/test/jdk/jfr/api/metadata/eventtype/TestGetSettings.java 2019-01-29 11:01:28.143392225 +0800 @@ -0,0 +1,57 @@ +/* + * Copyright (c) 2018, 2019, 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. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * 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. + */ + +package jdk.jfr.api.metadata.eventtype; + +import java.util.List; + +import jdk.jfr.EventType; +import jdk.jfr.SettingDescriptor; +import jdk.testlibrary.Asserts; + +/* + * @test + * @summary Test getSettings() + * @key jfr + * @library /lib/testlibrary + * @build jdk.jfr.api.metadata.eventtype.EventWithCustomSettings + * @run main/othervm jdk.jfr.api.metadata.eventtype.TestGetSettings + */ +public class TestGetSettings { + + public static void main(String[] args) throws Throwable { + EventType eventType = EventType.getEventType(EventWithCustomSettings.class); + List settings = eventType.getSettingDescriptors(); + Asserts.assertEquals(settings.size(), 5, "Wrong number of settings"); + + // test immutability + try { + settings.add(settings.get(0)); + Asserts.fail("Should not be able to modify list returned by getSettings()"); + } catch (UnsupportedOperationException uoe) { + // OK, as expected + } + } +}