Define list of Nodes that have minimum two children in tests (#52957)…

… (#52994)

(cherry picked from commit c1e43e694f02edf3e197abbab7c21008c022b516)

x-pack/plugin/ql/src/test/java/org/elasticsearch/xpack/ql/tree/NodeSubclassTests.java

@@ -24,6 +24,8 @@
 import org.elasticsearch.xpack.ql.expression.gen.processor.ConstantProcessor;
 import org.elasticsearch.xpack.ql.expression.gen.processor.Processor;
 import org.elasticsearch.xpack.ql.expression.predicate.fulltext.FullTextPredicate;
+import org.elasticsearch.xpack.ql.expression.predicate.operator.comparison.In;
+import org.elasticsearch.xpack.ql.expression.predicate.operator.comparison.InPipe;
 import org.elasticsearch.xpack.ql.expression.predicate.regex.Like;
 import org.elasticsearch.xpack.ql.expression.predicate.regex.LikePattern;
 import org.elasticsearch.xpack.ql.tree.NodeTests.ChildrenAreAProperty;
@@ -56,6 +58,7 @@
 import java.util.jar.JarEntry;
 import java.util.jar.JarInputStream;
 
+import static java.util.Arrays.asList;
 import static java.util.Collections.emptyList;
 import static java.util.stream.Collectors.toList;
 import static org.mockito.Mockito.mock;
@@ -85,6 +88,8 @@
  * </ul>
  */
 public class NodeSubclassTests<T extends B, B extends Node<B>> extends ESTestCase {
+
+    private static final List<Class<?>> CLASSES_WITH_MIN_TWO_CHILDREN = asList(In.class, InPipe.class);
 
     private final Class<T> subclass;
 
@@ -153,7 +158,6 @@ public void testTransform() throws Exception {
     /**
      * Test {@link Node#replaceChildren} implementation on {@link #subclass}.
      */
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/52951")
     public void testReplaceChildren() throws Exception {
         Constructor<T> ctor = longestCtor(subclass);
         Object[] nodeCtorArgs = ctorArgs(ctor);
@@ -564,7 +568,7 @@ private int randomSizeForCollection(Class<? extends Node<?>> toBuildClass) {
     }
 
     protected boolean hasAtLeastTwoChildren(Class<? extends Node<?>> toBuildClass) {
-        return false;
+        return CLASSES_WITH_MIN_TWO_CHILDREN.stream().anyMatch(toBuildClass::equals);
     }
 
     private List<?> makeListOfSameSizeOtherThan(Type listType, List<?> original) throws Exception {