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// Copyright 2020 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.provision.maintenance;
import com.yahoo.config.provision.HostName;
import org.junit.Test;
import java.time.Duration;
import java.time.Instant;
import java.util.Arrays;
import java.util.List;
import static org.junit.Assert.assertEquals;
/**
* @author freva
*/
public class MaintainerTest {
@Test
public void staggering() {
List<HostName> cluster = Arrays.asList(HostName.from("cfg1"), HostName.from("cfg2"), HostName.from("cfg3"));
Instant now = Instant.ofEpochMilli(1001);
Duration interval = Duration.ofMillis(300);
assertEquals(299, Maintainer.staggeredDelay(cluster, HostName.from("cfg1"), now, interval));
assertEquals(399, Maintainer.staggeredDelay(cluster, HostName.from("cfg2"), now, interval));
assertEquals(199, Maintainer.staggeredDelay(cluster, HostName.from("cfg3"), now, interval));
now = Instant.ofEpochMilli(1101);
assertEquals(199, Maintainer.staggeredDelay(cluster, HostName.from("cfg1"), now, interval));
assertEquals(299, Maintainer.staggeredDelay(cluster, HostName.from("cfg2"), now, interval));
assertEquals(399, Maintainer.staggeredDelay(cluster, HostName.from("cfg3"), now, interval));
assertEquals(300, Maintainer.staggeredDelay(cluster, HostName.from("cfg0"), now, interval));
}
}
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