/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 *   SPDX-License-Identifier: Apache-2.0
 */

package org.apache.jena.atlas.event;

import static org.junit.jupiter.api.Assertions.assertEquals;

import org.junit.jupiter.api.Test;

public class TestEvent {
    EventType ev1 = new EventType("1");
    EventType ev2 = new EventType("2");

    static class EventListenerLogger implements EventListener {
        public int eventCount = 0;
        public Object dest = null;
        public Event event = null;

        @Override
        public void event(Object dest, Event event) {
            eventCount++;
            this.dest = dest;
            this.event = event;
        }
    }

    @Test
    public void event1() {
        EventListenerLogger listener = new EventListenerLogger();
        Object obj = new Object();
        Object arg = new String("arg");

        assertEquals(0, listener.eventCount);
        EventManager.register(obj, ev1, listener);
        EventManager.send(obj, new Event(ev1, arg));

        assertEquals(1, listener.eventCount);
        assertEquals(ev1, listener.event.getType());
        assertEquals(arg, listener.event.getArgument());
    }

    @Test
    public void event2() {
        EventListenerLogger listener = new EventListenerLogger();
        Object obj = new Object();
        Object arg = new String("arg");

        assertEquals(0, listener.eventCount);
        EventManager.register(obj, ev1, listener);

        EventManager.send(obj, new Event(ev1, arg));
        assertEquals(1, listener.eventCount);

        EventManager.send(obj, new Event(ev2, arg));
        assertEquals(1, listener.eventCount);

        EventManager.send(obj, new Event(ev1, arg));
        assertEquals(2, listener.eventCount);

        assertEquals(ev1, listener.event.getType());
        assertEquals(arg, listener.event.getArgument());
    }

    @Test
    public void event3() {
        EventListenerLogger listener = new EventListenerLogger();
        Object obj = new Object();

        EventManager.send(obj, new Event(ev1, "foo"));
        assertEquals(0, listener.eventCount);

        EventManager.register(obj, ev1, listener);
        EventManager.send(obj, new Event(ev1, "foo"));
        assertEquals(1, listener.eventCount);

        EventManager.unregister(obj, ev1, listener);
        EventManager.send(obj, new Event(ev1, "foo"));
        assertEquals(1, listener.eventCount);
    }
}
