TestPriorEventBufferMulti.java

/*
 ***************************************************************************************
 *  Copyright (C) 2006 EsperTech, Inc. All rights reserved.                            *
 *  http://www.espertech.com/esper                                                     *
 *  http://www.espertech.com                                                           *
 *  ---------------------------------------------------------------------------------- *
 *  The software in this package is published under the terms of the GPL license       *
 *  a copy of which has been included with this distribution in the license.txt file.  *
 ***************************************************************************************
 */
package com.espertech.esper.view.internal;

import com.espertech.esper.client.EventBean;
import com.espertech.esper.supportunit.bean.SupportBean_S0;
import com.espertech.esper.supportunit.event.SupportEventBeanFactory;
import junit.framework.TestCase;

public class TestPriorEventBufferMulti extends TestCase {
    private PriorEventBufferMulti buffer;
    private EventBean[] events;

    public void setUp() {
        int[] indexes = new int[]{1, 3};
        buffer = new PriorEventBufferMulti(indexes);

        events = new EventBean[100];
        for (int i = 0; i < events.length; i++) {
            SupportBean_S0 bean = new SupportBean_S0(i);
            events[i] = SupportEventBeanFactory.createObject(bean);
        }
    }

    public void testFlow() {
        buffer.update(new EventBean[]{events[0], events[1]}, null);
        assertEvents0And1();

        buffer.update(new EventBean[]{events[2]}, null);
        assertEvents0And1();
        assertEvents2();

        buffer.update(new EventBean[]{events[3], events[4]}, null);
        assertEvents0And1();
        assertEvents2();
        assertEvents3And4();

        buffer.update(null, new EventBean[]{events[0]});
        assertEvents0And1();
        assertEvents2();
        assertEvents3And4();

        buffer.update(null, new EventBean[]{events[1], events[3]});
        tryInvalid(events[0], 0);
        tryInvalid(events[0], 1);
        assertEquals(events[0], buffer.getRelativeToEvent(events[1], 0));
        assertNull(buffer.getRelativeToEvent(events[1], 1));
        assertEvents2();
        assertEvents3And4();

        buffer.update(new EventBean[]{events[5]}, null);
        tryInvalid(events[0], 0);
        tryInvalid(events[1], 0);
        tryInvalid(events[3], 0);
        assertEvents2();
        assertEquals(events[3], buffer.getRelativeToEvent(events[4], 0));
        assertEquals(events[1], buffer.getRelativeToEvent(events[4], 1));
        assertEquals(events[4], buffer.getRelativeToEvent(events[5], 0));
        assertEquals(events[2], buffer.getRelativeToEvent(events[5], 1));
    }

    private void assertEvents0And1() {
        assertNull(buffer.getRelativeToEvent(events[0], 0));     // getting 0 is getting prior 1 (see indexes)
        assertNull(buffer.getRelativeToEvent(events[0], 1));     // getting 1 is getting prior 3 (see indexes)
        assertEquals(events[0], buffer.getRelativeToEvent(events[1], 0));
        assertNull(buffer.getRelativeToEvent(events[1], 1));
    }

    private void assertEvents2() {
        assertEquals(events[1], buffer.getRelativeToEvent(events[2], 0));
        assertNull(buffer.getRelativeToEvent(events[2], 1));
    }

    private void assertEvents3And4() {
        assertEquals(events[2], buffer.getRelativeToEvent(events[3], 0));
        assertEquals(events[0], buffer.getRelativeToEvent(events[3], 1));
        assertEquals(events[3], buffer.getRelativeToEvent(events[4], 0));
        assertEquals(events[1], buffer.getRelativeToEvent(events[4], 1));
    }

    public void tryInvalid(EventBean theEvent, int index) {
        try {
            buffer.getRelativeToEvent(theEvent, index);
            fail();
        } catch (IllegalStateException ex) {
            // expected
        }
    }

    public void testInvalid() {
        try {
            buffer.getRelativeToEvent(events[1], 2);
            fail();
        } catch (IllegalArgumentException ex) {
            // expected
        }
    }
}