--- /dev/null 2018-06-17 23:18:20.806999507 +0800 +++ new/test/jdk/jfr/api/consumer/TestSingleRecordedEvent.java 2019-01-29 11:00:44.462664225 +0800 @@ -0,0 +1,68 @@ +/* + * 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.consumer; + +import java.util.List; + +import jdk.jfr.Description; +import jdk.jfr.Event; +import jdk.jfr.Recording; +import jdk.jfr.consumer.RecordedEvent; +import jdk.testlibrary.Asserts; +import jdk.testlibrary.jfr.Events; + +/* + * @test + * @summary Verifies that a single JFR event is recorded as expected + * @key jfr + * @library /lib/testlibrary + * @run main/othervm jdk.jfr.api.consumer.TestSingleRecordedEvent + */ +public class TestSingleRecordedEvent { + + @Description("MyDescription") + private static class MyEvent extends Event { + } + + public static void main(String[] args) throws Throwable { + Recording r = new Recording(); + r.start(); + // Commit a single event to the recording + MyEvent event = new MyEvent(); + event.commit(); + r.stop(); + List events = Events.fromRecording(r); + Events.hasEvents(events); + + // Should be 1 event only + Asserts.assertEquals(events.size(), 1); + + RecordedEvent recordedEvent = events.get(0); + + // Event description should be the same + Asserts.assertEquals(recordedEvent.getEventType().getDescription(), "MyDescription"); + } +}