[Tests] Harden InternalExtendedStatsTests (#24934)

The order in which double values are added in Java can give different results,
so in testing the sum and sumOfSquares we need to allow some delta for testing
equality. The difference can be larger for large sum values, so we should
account for this by making the delta in the assertion depend on the values
magnitude.

Closes #24931

1 files changed, 5 insertions, 2 deletions

diff --git a/core/src/test/java/org/elasticsearch/search/aggregations/metrics/InternalExtendedStatsTests.java b/core/src/test/java/org/elasticsearch/search/aggregations/metrics/InternalExtendedStatsTests.java
index a6ccce6fbe..2ea386ebb2 100644
--- a/core/src/test/java/org/elasticsearch/search/aggregations/metrics/InternalExtendedStatsTests.java
+++ b/core/src/test/java/org/elasticsearch/search/aggregations/metrics/InternalExtendedStatsTests.java
@@ -79,10 +79,13 @@ public class InternalExtendedStatsTests extends InternalAggregationTestCase<Inte
         }
         assertEquals(sigma, reduced.getSigma(), 0);
         assertEquals(expectedCount, reduced.getCount());
-        assertEquals(expectedSum, reduced.getSum(), 1e-07);
+        // The order in which you add double values in java can give different results. The difference can
+        // be larger for large sum values, so we make the delta in the assertion depend on the values magnitude
+        assertEquals(expectedSum, reduced.getSum(), Math.abs(expectedSum) * 1e-12);
         assertEquals(expectedMin, reduced.getMin(), 0d);
         assertEquals(expectedMax, reduced.getMax(), 0d);
-        assertEquals(expectedSumOfSquare, reduced.getSumOfSquares(), 1e-07);
+        // summing squared values, see reason for delta above
+        assertEquals(expectedSumOfSquare, reduced.getSumOfSquares(), expectedSumOfSquare * 1e-14);
     }
 
     @Override