/*
 ***************************************************************************************
 *  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.regression.resultset;

import com.espertech.esper.client.*;
import com.espertech.esper.client.scopetest.EPAssertionUtil;
import com.espertech.esper.client.scopetest.SupportUpdateListener;
import com.espertech.esper.client.soda.EPStatementObjectModel;
import com.espertech.esper.metrics.instrumentation.InstrumentationHelper;
import com.espertech.esper.supportregression.bean.SupportBean;
import com.espertech.esper.supportregression.client.SupportConfigFactory;
import com.espertech.esper.supportregression.util.SupportMessageAssertUtil;
import junit.framework.TestCase;

public class TestAggregateExtLeaving extends TestCase {

    private EPServiceProvider epService;
    private SupportUpdateListener listener;

    public void setUp()
    {
        listener = new SupportUpdateListener();
        Configuration config = SupportConfigFactory.getConfiguration();
        config.addEventType("SupportBean", SupportBean.class);
        epService = EPServiceProviderManager.getDefaultProvider(config);
        epService.initialize();
        if (InstrumentationHelper.ENABLED) { InstrumentationHelper.startTest(epService, this.getClass(), getName());}
    }

    protected void tearDown() throws Exception {
        if (InstrumentationHelper.ENABLED) { InstrumentationHelper.endTest();}
        listener = null;
    }

    public void testLeaving()
    {
        String epl = "select leaving() as val from SupportBean#length(3)";
        EPStatement stmt = epService.getEPAdministrator().createEPL(epl);
        stmt.addListener(listener);

        runAssertion();

        stmt.destroy();
        EPStatementObjectModel model = epService.getEPAdministrator().compileEPL(epl);
        stmt = epService.getEPAdministrator().create(model);
        stmt.addListener(listener);
        assertEquals(epl, model.toEPL());

        runAssertion();

        tryInvalid("select leaving(1) from SupportBean",
                "Error starting statement: Failed to validate select-clause expression 'leaving(1)': The 'leaving' function expects no parameters");
    }

    private void runAssertion() {
        String[] fields = "val".split(",");

        epService.getEPRuntime().sendEvent(new SupportBean("E1", 1));
        EPAssertionUtil.assertProps(listener.assertOneGetNewAndReset(), fields, new Object[]{false});

        epService.getEPRuntime().sendEvent(new SupportBean("E2", 2));
        EPAssertionUtil.assertProps(listener.assertOneGetNewAndReset(), fields, new Object[]{false});

        epService.getEPRuntime().sendEvent(new SupportBean("E3", 3));
        EPAssertionUtil.assertProps(listener.assertOneGetNewAndReset(), fields, new Object[]{false});

        epService.getEPRuntime().sendEvent(new SupportBean("E4", 4));
        EPAssertionUtil.assertProps(listener.assertOneGetNewAndReset(), fields, new Object[]{true});
    }

    private void tryInvalid(String epl, String message) {
        try
        {
            epService.getEPAdministrator().createEPL(epl);
            fail();
        }
        catch (EPStatementException ex) {
            SupportMessageAssertUtil.assertMessage(ex, ex.getMessage());
        }
    }
}