/*
 * Licensed to Crate under one or more contributor license agreements.
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.  Crate 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.
 *
 * However, if you have executed another commercial license agreement
 * with Crate these terms will supersede the license and you may use the
 * software solely pursuant to the terms of the relevant commercial
 * agreement.
 */

package io.crate.action;

import io.crate.test.integration.CrateUnitTest;
import org.elasticsearch.action.bulk.BackoffPolicy;
import org.elasticsearch.common.unit.TimeValue;
import org.hamcrest.Matchers;
import org.junit.Test;

import java.util.Iterator;
import java.util.NoSuchElementException;


public class LimitedBackoffPolicyTest extends CrateUnitTest {

    @Test
    public void testNoNext() throws Exception {
        BackoffPolicy policy = new LimitedExponentialBackoff(0, 1, Integer.MAX_VALUE);
        Iterator<TimeValue> it = policy.iterator();
        it.next();
        expectedException.expect(NoSuchElementException.class);
        expectedException.expectMessage("Reached maximum amount of backoff iterations. Only 1 iterations allowed.");
        it.next();
    }

    @Test
    public void testStartValue() throws Exception {
        LimitedExponentialBackoff policy = new LimitedExponentialBackoff(100, 1, Integer.MAX_VALUE);
        Iterator<TimeValue> it = policy.iterator();
        assertEquals(TimeValue.timeValueMillis(100), it.next());
    }

    @Test
    public void testLimit() throws Exception {
        int maxDelay = 1000;
        LimitedExponentialBackoff policy = new LimitedExponentialBackoff(0, 1000, maxDelay);
        for (TimeValue val : policy) {
            assertThat(val.millis(), Matchers.lessThanOrEqualTo((long) maxDelay));
        }
    }
}