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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.clustercontroller.core;
import com.google.common.collect.Sets;
import org.junit.jupiter.api.Test;
import java.util.Set;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertTrue;
public class ClusterStatsChangeTrackerTest {
private static class StatsBuilder {
private final ContentClusterStatsBuilder builder = new ContentClusterStatsBuilder();
StatsBuilder bucketsPending(int contentNodeIndex) {
builder.add(contentNodeIndex, "global", 5, 1);
return this;
}
StatsBuilder inSync(int contentNodeIndex) {
builder.add(contentNodeIndex, "global", 5, 0);
return this;
}
ContentClusterStats build() {
return builder.build();
}
}
private static StatsBuilder stats() {
return new StatsBuilder();
}
private static class Fixture {
private final Set<Integer> contentNodeIndices;
private ClusterStatsAggregator aggregator;
private final ClusterStatsChangeTracker tracker;
private final double minMergeCompletionRatio;
private Fixture(Set<Integer> contentNodeIndices,
double minMergeCompletionRatio) {
this.contentNodeIndices = contentNodeIndices;
this.minMergeCompletionRatio = minMergeCompletionRatio;
aggregator = new ClusterStatsAggregator(Sets.newHashSet(1), this.contentNodeIndices);
tracker = new ClusterStatsChangeTracker(aggregator.getAggregatedStats(), minMergeCompletionRatio);
}
static Fixture empty() {
return new Fixture(Sets.newHashSet(0, 1), 1.0);
}
static Fixture fromStats(StatsBuilder builder) {
Fixture result = new Fixture(Sets.newHashSet(0, 1), 1.0);
result.updateStats(builder);
return result;
}
void newAggregatedStats(StatsBuilder builder) {
aggregator = new ClusterStatsAggregator(Sets.newHashSet(1), contentNodeIndices);
updateStats(builder);
tracker.updateAggregatedStats(aggregator.getAggregatedStats(), minMergeCompletionRatio);
}
private void updateStats(StatsBuilder builder) {
aggregator.updateForDistributor(1, builder.build());
}
boolean statsHaveChanged() {
return tracker.statsHaveChanged();
}
}
@Test
void stats_have_not_changed_if_not_all_distributors_are_updated() {
Fixture f = Fixture.empty();
assertFalse(f.statsHaveChanged());
}
@Test
void stats_have_changed_if_in_sync_node_not_found_in_previous_stats() {
Fixture f = Fixture.fromStats(stats().inSync(0));
assertTrue(f.statsHaveChanged());
}
@Test
void stats_have_changed_if_buckets_pending_node_not_found_in_previous_stats() {
Fixture f = Fixture.fromStats(stats().bucketsPending(0));
assertTrue(f.statsHaveChanged());
}
@Test
void stats_have_changed_if_one_node_has_in_sync_to_buckets_pending_transition() {
Fixture f = Fixture.fromStats(stats().bucketsPending(0).inSync(1));
f.newAggregatedStats(stats().bucketsPending(0).bucketsPending(1));
assertTrue(f.statsHaveChanged());
}
@Test
void stats_have_changed_if_one_node_has_buckets_pending_to_in_sync_transition() {
Fixture f = Fixture.fromStats(stats().bucketsPending(0).bucketsPending(1));
f.newAggregatedStats(stats().bucketsPending(0).inSync(1));
assertTrue(f.statsHaveChanged());
}
@Test
void stats_have_not_changed_if_no_nodes_have_changed_state() {
Fixture f = Fixture.fromStats(stats().bucketsPending(0).bucketsPending(1));
f.newAggregatedStats(stats().bucketsPending(0).bucketsPending(1));
assertFalse(f.statsHaveChanged());
}
}
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