/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch 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.elasticsearch.search.rescore;

import org.elasticsearch.test.ESTestCase;

import java.io.IOException;

/**
 * Test fixing the ordinals and names in {@link QueryRescoreMode}. These should not be changed since we
 * use the names in the parser and the ordinals in serialization.
 */
public class QueryRescoreModeTests extends ESTestCase {

    /**
     * Test @link {@link QueryRescoreMode} enum ordinals and names, since serialization relies on it
     */
    public void testQueryRescoreMode() throws IOException {
        float primary = randomFloat();
        float secondary = randomFloat();
        assertEquals(0, QueryRescoreMode.Avg.ordinal());
        assertEquals("avg", QueryRescoreMode.Avg.toString());
        assertEquals((primary + secondary)/2.0f, QueryRescoreMode.Avg.combine(primary, secondary), Float.MIN_VALUE);

        assertEquals(1, QueryRescoreMode.Max.ordinal());
        assertEquals("max", QueryRescoreMode.Max.toString());
        assertEquals(Math.max(primary, secondary), QueryRescoreMode.Max.combine(primary, secondary), Float.MIN_VALUE);

        assertEquals(2, QueryRescoreMode.Min.ordinal());
        assertEquals("min", QueryRescoreMode.Min.toString());
        assertEquals(Math.min(primary, secondary), QueryRescoreMode.Min.combine(primary, secondary), Float.MIN_VALUE);

        assertEquals(3, QueryRescoreMode.Total.ordinal());
        assertEquals("sum", QueryRescoreMode.Total.toString());
        assertEquals(primary + secondary, QueryRescoreMode.Total.combine(primary, secondary), Float.MIN_VALUE);

        assertEquals(4, QueryRescoreMode.Multiply.ordinal());
        assertEquals("product", QueryRescoreMode.Multiply.toString());
        assertEquals(primary * secondary, QueryRescoreMode.Multiply.combine(primary, secondary), Float.MIN_VALUE);
    }
}