force merge in CachingEnableFilterQueryTests (elastic#135148)

Author: john-wagster

muted-tests.yml

@@ -531,9 +531,6 @@ tests:
 - class: org.elasticsearch.xpack.esql.expression.function.scalar.score.DecayTests
   method: "testEvaluateBlockWithNulls {TestCase=<integer>, <integer>, <integer>, <_source> #2}"
   issue: https://github.com/elastic/elasticsearch/issues/134679
-- class: org.elasticsearch.search.vectors.CachingEnableFilterQueryTests
-  method: testTermQuery
-  issue: https://github.com/elastic/elasticsearch/issues/134723
 - class: org.elasticsearch.discovery.DiscoveryDisruptionIT
   method: testElectMasterWithLatestVersion
   issue: https://github.com/elastic/elasticsearch/issues/134748
@@ -597,9 +594,6 @@ tests:
 - class: org.elasticsearch.cluster.routing.allocation.allocator.DesiredBalanceComputerTests
   method: testDesiredBalanceShouldConvergeInABigCluster
   issue: https://github.com/elastic/elasticsearch/issues/135123
-- class: org.elasticsearch.search.vectors.CachingEnableFilterQueryTests
-  method: testBooleanQuery
-  issue: https://github.com/elastic/elasticsearch/issues/135124
 - class: org.elasticsearch.xpack.test.rest.XPackRestIT
   method: test {p0=transform/transforms_start_stop/Test stop transform with force and wait_for_checkpoint true}
   issue: https://github.com/elastic/elasticsearch/issues/135135

server/src/test/java/org/elasticsearch/search/vectors/CachingEnableFilterQueryTests.java

@@ -54,6 +54,7 @@ public void testTermQuery() throws IOException {
                 }
                 iw.addDocument(doc);
             }
+            iw.forceMerge(1);
 
             try (IndexReader reader = iw.getReader()) {
                 assertTrue(reader.leaves().size() == 1 && reader.hasDeletions() == false);
@@ -89,6 +90,7 @@ public void testBooleanQuery() throws IOException {
                 doc.add(newStringField("f2", "bar", Field.Store.YES));
                 iw.addDocument(doc);
             }
+            iw.forceMerge(1);
 
             try (IndexReader reader = iw.getReader()) {
                 assertTrue(reader.leaves().size() == 1 && reader.hasDeletions() == false);