Rename random ASCII helper methods

This commit renames the random ASCII helper methods in ESTestCase. This
is because this method ultimately uses the random ASCII methods from
randomized runner, but these methods actually only produce random
strings generated from [a-zA-Z].

Relates #23886

1 files changed, 3 insertions, 3 deletions

diff --git a/core/src/test/java/org/elasticsearch/search/aggregations/pipeline/DerivativeTests.java b/core/src/test/java/org/elasticsearch/search/aggregations/pipeline/DerivativeTests.java
index 678bb0b5c4..4b98e2ee6b 100644
--- a/core/src/test/java/org/elasticsearch/search/aggregations/pipeline/DerivativeTests.java
+++ b/core/src/test/java/org/elasticsearch/search/aggregations/pipeline/DerivativeTests.java
@@ -27,11 +27,11 @@ public class DerivativeTests extends BasePipelineAggregationTestCase<DerivativeP
 
     @Override
     protected DerivativePipelineAggregationBuilder createTestAggregatorFactory() {
-        String name = randomAsciiOfLengthBetween(3, 20);
-        String bucketsPath = randomAsciiOfLengthBetween(3, 20);
+        String name = randomAlphaOfLengthBetween(3, 20);
+        String bucketsPath = randomAlphaOfLengthBetween(3, 20);
         DerivativePipelineAggregationBuilder factory = new DerivativePipelineAggregationBuilder(name, bucketsPath);
         if (randomBoolean()) {
-            factory.format(randomAsciiOfLengthBetween(1, 10));
+            factory.format(randomAlphaOfLengthBetween(1, 10));
         }
         if (randomBoolean()) {
             factory.gapPolicy(randomFrom(GapPolicy.values()));