Test: Added test that uses an agg in a trigger.

Original commit: elastic/x-pack-elasticsearch@ad87b18aa5

src/test/java/org/elasticsearch/alerts/AbstractAlertingTests.java

@@ -122,6 +122,24 @@ public abstract class AbstractAlertingTests extends ElasticsearchIntegrationTest
         return internalTestCluster().getInstance(AlertsClient.class);
     }
 
+    protected void assertAlertTriggeredExact(final String alertName, final long expectedAlertActionsWithActionPerformed) throws Exception {
+        assertBusy(new Runnable() {
+            @Override
+            public void run() {
+                ClusterState state = client().admin().cluster().prepareState().get().getState();
+                String[] alertHistoryIndices = state.metaData().concreteIndices(IndicesOptions.lenientExpandOpen(), AlertActionManager.ALERT_HISTORY_INDEX_PREFIX + "*");
+                assertThat(alertHistoryIndices, not(emptyArray()));
+                for (String index : alertHistoryIndices) {
+                    IndexRoutingTable routingTable = state.getRoutingTable().index(index);
+                    assertThat(routingTable, notNullValue());
+                    assertThat(routingTable.allPrimaryShardsActive(), is(true));
+                }
+
+                assertThat(findNumberOfPerformedActions(alertName), equalTo(expectedAlertActionsWithActionPerformed));
+            }
+        });
+    }
+
     protected void assertAlertTriggered(final String alertName, final long minimumExpectedAlertActionsWithActionPerformed) throws Exception {
         assertAlertTriggered(alertName, minimumExpectedAlertActionsWithActionPerformed, true);
     }

src/test/java/org/elasticsearch/alerts/BasicAlertingTest.java

@@ -13,7 +13,12 @@ import org.elasticsearch.alerts.transport.actions.delete.DeleteAlertRequest;
 import org.elasticsearch.alerts.transport.actions.delete.DeleteAlertResponse;
 import org.elasticsearch.alerts.transport.actions.put.PutAlertResponse;
 import org.elasticsearch.common.bytes.BytesReference;
+import org.elasticsearch.index.query.FilterBuilders;
+import org.elasticsearch.index.query.QueryBuilders;
 import org.elasticsearch.script.ScriptService;
+import org.elasticsearch.search.aggregations.AggregationBuilders;
+import org.elasticsearch.search.aggregations.bucket.histogram.DateHistogram;
+import org.elasticsearch.search.aggregations.bucket.histogram.Histogram;
 import org.elasticsearch.search.builder.SearchSourceBuilder;
 import org.junit.Test;
 
@@ -158,6 +163,55 @@ public class BasicAlertingTest extends AbstractAlertingTests {
         assertThat(triggered, equalTo(findNumberOfPerformedActions("1")));
     }
 
+    @Test
+    public void testAggregations() throws Exception {
+        class R implements Runnable {
+
+            private final long sleepTime;
+            private final long totalTime;
+
+            R(long sleepTime, long totalTime) {
+                this.sleepTime = sleepTime;
+                this.totalTime = totalTime;
+            }
+
+            @Override
+            public void run() {
+                long startTime = System.currentTimeMillis();
+                while ((System.currentTimeMillis() - startTime) < totalTime) {
+                    client().prepareIndex("my-index", "my-type").setCreate(true).setSource("{}").get();
+                    try {
+                        Thread.sleep(sleepTime);
+                    } catch (InterruptedException e) {
+                        Thread.currentThread().interrupt();
+                        return;
+                    }
+                }
+            }
+        }
+
+        assertAcked(prepareCreate("my-index").addMapping("my-type", "_timestamp", "enabled=true"));
+        SearchRequest searchRequest = createTriggerSearchRequest("my-index").source(
+                searchSource()
+                        .query(QueryBuilders.constantScoreQuery(FilterBuilders.rangeFilter("_timestamp").from("{{SCHEDULED_FIRE_TIME}}||-1m").to("{{SCHEDULED_FIRE_TIME}}")))
+                        .aggregation(AggregationBuilders.dateHistogram("rate").field("_timestamp").interval(DateHistogram.Interval.SECOND).order(Histogram.Order.COUNT_DESC))
+        );
+        BytesReference reference = createAlertSource("* 0/1 * * * ? *", searchRequest, "aggregations.rate.buckets[0]?.doc_count > 5");
+        alertClient().preparePutAlert("rate-alert").setAlertSource(reference).get();
+
+        Thread indexThread = new Thread(new R(500, 60000));
+        indexThread.start();
+        indexThread.join();
+
+        assertAlertTriggeredExact("rate-alert", 0);
+        assertNoAlertTrigger("rate-alert", 1);
+
+        indexThread = new Thread(new R(100, 60000));
+        indexThread.start();
+        indexThread.join();
+        assertAlertTriggered("rate-alert", 1);
+    }
+
     private final SearchSourceBuilder searchSourceBuilder = searchSource().query(
             filteredQuery(matchQuery("event_type", "a"), rangeFilter("_timestamp").from("{{SCHEDULED_FIRE_TIME}}||-30s").to("{{SCHEDULED_FIRE_TIME}}"))
     );