/*
 *  Licensed to GraphHopper and Peter Karich under one or more contributor
 *  license agreements. See the NOTICE file distributed with this work for 
 *  additional information regarding copyright ownership.
 *
 *  GraphHopper 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
 *
 *       http://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.
 */
package com.graphhopper.routing.util;

import com.graphhopper.util.EdgeIterator;
import com.graphhopper.util.GHUtility;
import org.junit.Test;
import static org.junit.Assert.*;

/**
 * @author Peter Karich
 */
public class FastestWeightingTest
{
    private final FlagEncoder encoder = new EncodingManager("CAR").getEncoder("CAR");

    @Test
    public void testMinWeightHasSameUnitAs_getWeight()
    {
        FastestWeighting instance = new FastestWeighting(encoder);
        long flags = encoder.setProperties(encoder.getMaxSpeed(), true, true);
        assertEquals(instance.getMinWeight(10), instance.calcWeight(createEdge(10, flags), false), 1e-8);
    }

    @Test
    public void testSpeed0()
    {
        FastestWeighting instance = new FastestWeighting(encoder);

        assertEquals(1.0 / 0, instance.calcWeight(createEdge(10, encoder.setProperties(0, true, true)), false), 1e-8);

        // 0 / 0 returns NaN but calcWeight should not return NaN!
        assertEquals(1.0 / 0, instance.calcWeight(createEdge(0, encoder.setProperties(0, true, true)), false), 1e-8);
    }

    EdgeIterator createEdge( final double distance, final long flags )
    {
        return new GHUtility.DisabledEdgeIterator()
        {
            @Override
            public double getDistance()
            {
                return distance;
            }

            @Override
            public long getFlags()
            {
                return flags;
            }
        };
    }
}
