public void testQueueStats() {
List<ClusterState> states = randomStates(scaledRandomIntBetween(10, 100), "master");
PendingClusterStatesQueue queue = createQueueWithStates(states);
assertThat(queue.stats().getTotal(), equalTo(states.size()));
assertThat(queue.stats().getPending(), equalTo(states.size()));
assertThat(queue.stats().getCommitted(), equalTo(0));
List<ClusterStateContext> committedContexts = randomCommitStates(queue);
assertThat(queue.stats().getTotal(), equalTo(states.size()));
assertThat(queue.stats().getPending(), equalTo(states.size() - committedContexts.size()));
assertThat(queue.stats().getCommitted(), equalTo(committedContexts.size()));
ClusterState highestCommitted = null;
for (ClusterStateContext context : committedContexts) {
if (highestCommitted == null || context.state.supersedes(highestCommitted)) {
highestCommitted = context.state;
}
}
assert highestCommitted != null;
queue.markAsProcessed(highestCommitted);
assertThat(
(long) queue.stats().getTotal(), equalTo(states.size() - (1 + highestCommitted.version())));
assertThat(
(long) queue.stats().getPending(),
equalTo(states.size() - (1 + highestCommitted.version())));
assertThat(queue.stats().getCommitted(), equalTo(0));
}
