[Transform] fix sporadic race condition in TransformUsageIT (#52946)

relax the test for trigger count

fixes #52931

x-pack/plugin/transform/qa/single-node-tests/src/test/java/org/elasticsearch/xpack/transform/integration/TransformUsageIT.java

@@ -22,6 +22,8 @@ import java.util.concurrent.TimeUnit;
 
 import static org.elasticsearch.xpack.core.transform.TransformField.INDEX_DOC_TYPE;
 import static org.elasticsearch.xpack.transform.TransformInfoTransportAction.PROVIDED_STATS;
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.greaterThanOrEqualTo;
 
 public class TransformUsageIT extends TransformRestTestCase {
 
@@ -102,12 +104,21 @@ public class TransformUsageIT extends TransformRestTestCase {
                     || statName.equals(TransformIndexerStats.SEARCH_TIME_IN_MS.getPreferredName())) {
                     continue;
                 }
-                assertEquals(
-                    "Incorrect stat " + statName,
-                    expectedStats.get(statName).doubleValue(),
-                    extractStatsAsDouble(XContentMapValues.extractValue("transform.stats." + statName, statsMap)),
-                    0.0001
-                );
+
+                // the trigger count can be higher if the scheduler kicked before usage has been called, therefore check for gte
+                if (statName.equals(TransformIndexerStats.NUM_INVOCATIONS.getPreferredName())) {
+                    assertThat(
+                        "Incorrect stat " + statName,
+                        extractStatsAsDouble(XContentMapValues.extractValue("transform.stats." + statName, statsMap)),
+                        greaterThanOrEqualTo(expectedStats.get(statName).doubleValue())
+                    );
+                } else {
+                    assertThat(
+                        "Incorrect stat " + statName,
+                        extractStatsAsDouble(XContentMapValues.extractValue("transform.stats." + statName, statsMap)),
+                        equalTo(expectedStats.get(statName).doubleValue())
+                    );
+                }
             }
             // Refresh the index so that statistics are searchable
             refreshIndex(TransformInternalIndexConstants.LATEST_INDEX_VERSIONED_NAME);