test/jdk/jdk/jfr/api/metadata/eventtype/TestGetSettings.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
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 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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package jdk.jfr.api.metadata.eventtype;

import java.util.List;

import jdk.jfr.EventType;
import jdk.jfr.SettingDescriptor;
import jdk.test.lib.Asserts;

/*
 * @test
 * @summary Test getSettings()
 * @key jfr
 * @library /test/lib /test/jdk
 * @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<SettingDescriptor> 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
        }
    }
}