fix test

Author: limotova

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/optimizer/rules/logical/TranslateTimeSeriesAggregate.java

@@ -16,6 +16,7 @@
 import org.elasticsearch.xpack.esql.core.expression.Literal;
 import org.elasticsearch.xpack.esql.core.expression.MetadataAttribute;
 import org.elasticsearch.xpack.esql.core.expression.NamedExpression;
+import org.elasticsearch.xpack.esql.core.tree.Node;
 import org.elasticsearch.xpack.esql.core.type.DataType;
 import org.elasticsearch.xpack.esql.core.util.CollectionUtils;
 import org.elasticsearch.xpack.esql.core.util.Holder;
@@ -245,7 +246,8 @@ protected LogicalPlan rule(TimeSeriesAggregate aggregate, LogicalOptimizerContex
             var timestampAwareFunctions = timeSeriesAggs.keySet()
                 .stream()
                 .filter(ts -> ts instanceof TimestampAware)
-                .map(ts -> ts.sourceText())
+                .map(Node::sourceText)
+                .sorted()
                 .toList();
             if (timestampAwareFunctions.isEmpty() == false) {
                 int size = timestampAwareFunctions.size();

x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/optimizer/LogicalPlanOptimizerTests.java

@@ -9675,7 +9675,6 @@ public void testFullTextFunctionOnEvalNull() {
         assertEquals("test", relation.indexPattern());
     }
 
-
     /*
      * Renaming or shadowing the @timestamp field prior to running stats with TS command is not allowed.
      */
@@ -9690,7 +9689,7 @@ STATS max(network.cost), count(network.eth0.rx)
                     """)))
             ).getMessage(),
             containsString("""
-                Functions [max(network.cost), count(network.eth0.rx)] requires a @timestamp field of type date \
+                Functions [count(network.eth0.rx), max(network.cost)] requires a @timestamp field of type date \
                 to be present when run with the TS command, but it was not present.""")
         );