/*
 * Copyright (c) 2014 Brocade Communications Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */

package org.opendaylight.openflowjava.protocol.impl.core;

import static org.mockito.Matchers.any;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import io.netty.channel.ChannelHandlerContext;

import java.util.concurrent.TimeUnit;

import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.system.rev130927.SwitchIdleEvent;

/**
 *
 * @author jameshall
 */
public class IdleHandlerTest {

    @Mock ChannelHandlerContext mockChHndlrCtx ;

    IdleHandler idleHandler ;

    /**
     * Sets up test environment
     *
     */
    @Before
    public void setUp() {
        MockitoAnnotations.initMocks(this);
        idleHandler = new IdleHandler(60L, TimeUnit.MINUTES ) ;
    }

    /**
     * Test message passing on channel read
     */
    @Test
    public void testChannelRead() {
        try {
            idleHandler.channelRead(mockChHndlrCtx, new Object() );
        } catch (Exception e) {
            Assert.fail();
        }

        // Verify that a read was fired for the next handler ...
        verify(mockChHndlrCtx, times(1)).fireChannelRead(any(SwitchIdleEvent.class)) ;
    }

    /**
     * Test channel read timeout
     */
    @Test
    public void testReadTimedOut() {
        try {
            idleHandler.readTimedOut( mockChHndlrCtx );
        } catch (Exception e) {
            Assert.fail();
        }

        // Verify a read was fired for the next handler to process ...
        verify(mockChHndlrCtx, times(1)).fireChannelRead(any(SwitchIdleEvent.class)) ;
    }

    /**
     * Test only one timeout notification
     */
    @Test
    public void testReadTimedOutNoOpNotFirst() {
        try {
            idleHandler.readTimedOut(mockChHndlrCtx);
            idleHandler.readTimedOut(mockChHndlrCtx);
        } catch (Exception e) {
            Assert.fail();
        }

        // Verify that only one notification was sent to the next handler ...
        verify(mockChHndlrCtx, times(1)).fireChannelRead(any(Object.class)) ;
    }

    /**
     * Test two timeout notifications
     */
    @Test
    public void testReadTimedOutTwice() {
        try {
            idleHandler.readTimedOut(mockChHndlrCtx);
            verify(mockChHndlrCtx, times(1)).fireChannelRead(any(Object.class)) ;

            idleHandler.channelRead(mockChHndlrCtx, new String() );
            verify(mockChHndlrCtx, times(2)).fireChannelRead(any(Object.class)) ;

            idleHandler.readTimedOut(mockChHndlrCtx);
            verify(mockChHndlrCtx, times(3)).fireChannelRead(any(Object.class)) ;
        } catch (Exception e) {
            Assert.fail();
        }
    }

}