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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.provision.node;
import com.google.common.collect.ImmutableMap;
import com.yahoo.vespa.hosted.provision.node.History.Event;
import org.junit.Test;
import java.time.Instant;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;
import static org.junit.Assert.assertEquals;
/**
* @author mpolden
*/
public class HistoryTest {
@Test
public void truncate_log() {
assertEquals(0, new History(List.of(), List.of()).log().size());
assertEquals(1, new History(ImmutableMap.of(), shuffledEvents(1), 2).log().size());
assertEquals(2, new History(ImmutableMap.of(), shuffledEvents(2), 2).log().size());
History history = new History(ImmutableMap.of(), shuffledEvents(5), 3);
assertEquals(3, history.log().size());
assertEquals("Most recent events are kept",
List.of(2L, 3L, 4L),
history.log().stream().map(e -> e.at().toEpochMilli()).toList());
}
private static List<Event> shuffledEvents(int count) {
Instant start = Instant.ofEpochMilli(0);
List<Event> events = new ArrayList<>();
for (int i = 0; i < count; i++) {
events.add(new Event(Event.Type.values()[i], Agent.system, start.plusMillis(i)));
}
Collections.shuffle(events);
return events;
}
}
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