/*
 * 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
 *
 *   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 org.onlab.graph;

import org.junit.Test;

import static com.google.common.collect.ImmutableSet.of;
import static org.junit.Assert.assertEquals;

/**
 * Base for all graph search tests.
 */
public abstract class AbstractGraphPathSearchTest extends GraphTest {

    /**
     * Creates a test-specific graph search to exercise.
     *
     * @return graph search
     */
    protected abstract AbstractGraphPathSearch<TestVertex, TestEdge> graphSearch();

    @Test(expected = IllegalArgumentException.class)
    public void noSuchSourceArgument() {
        graphSearch().search(new AdjacencyListsGraph<>(of(B, C),
                                                       of(new TestEdge(B, C, 1))),
                             A, H, weight);
    }

    @Test(expected = NullPointerException.class)
    public void nullGraphArgument() {
        graphSearch().search(null, A, H, weight);
    }

    @Test(expected = NullPointerException.class)
    public void nullSourceArgument() {
        graphSearch().search(new AdjacencyListsGraph<>(of(B, C),
                                                       of(new TestEdge(B, C, 1))),
                             null, H, weight);
    }

    @Test
    public void samenessThreshold() {
        AbstractGraphPathSearch<TestVertex, TestEdge> search = graphSearch();
        search.setSamenessThreshold(0.3);
        assertEquals("incorrect threshold", 0.3, search.samenessThreshold(), 0.01);
    }

}