/*
 * Copyright (c) 2008-2021, Hazelcast, Inc. All Rights Reserved.
 *
 * Licensed 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.hazelcast.jet.retry.impl;

import com.hazelcast.jet.retry.IntervalFunction;
import org.junit.Test;

import static org.junit.Assert.assertEquals;

public class IntervalFunctionTest {

    @Test
    public void constant() {
        IntervalFunction fun = IntervalFunction.constant(1000L);
        assertEquals(1000L, fun.waitAfterAttempt(1));
        assertEquals(1000L, fun.waitAfterAttempt(2));
        assertEquals(1000L, fun.waitAfterAttempt(3));
    }

    @Test
    public void exponentialBackoff() {
        IntervalFunction fun = IntervalFunction.exponentialBackoff(1000L, 2.0);
        assertEquals(1000L, fun.waitAfterAttempt(1));
        assertEquals(2000L, fun.waitAfterAttempt(2));
        assertEquals(4000L, fun.waitAfterAttempt(3));
        assertEquals(8000L, fun.waitAfterAttempt(4));
    }

}
