Fix test error

Author: wangyum

sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala

@@ -2701,11 +2701,13 @@ class SQLConf extends Serializable with Logging {
 
   def cacheVectorizedReaderEnabled: Boolean = getConf(CACHE_VECTORIZED_READER_ENABLED)
 
+  def defaultNumShufflePartitions: Int = getConf(SHUFFLE_PARTITIONS)
+
   def numShufflePartitions: Int = {
     if (adaptiveExecutionEnabled && coalesceShufflePartitionsEnabled) {
-      getConf(COALESCE_PARTITIONS_INITIAL_PARTITION_NUM).getOrElse(getConf(SHUFFLE_PARTITIONS))
+      getConf(COALESCE_PARTITIONS_INITIAL_PARTITION_NUM).getOrElse(defaultNumShufflePartitions)
     } else {
-      getConf(SHUFFLE_PARTITIONS)
+      defaultNumShufflePartitions
     }
   }
 

sql/core/src/main/scala/org/apache/spark/sql/execution/exchange/EnsureRequirements.scala

@@ -89,7 +89,7 @@ case class EnsureRequirements(conf: SQLConf) extends Rule[SparkPlan] {
         // expected number of shuffle partitions. However, if it's smaller than
         // `conf.numShufflePartitions`, we pick `conf.numShufflePartitions` as the
         // expected number of shuffle partitions.
-        math.max(nonShuffleChildrenNumPartitions.max, conf.numShufflePartitions)
+        math.max(nonShuffleChildrenNumPartitions.max, conf.defaultNumShufflePartitions)
       } else {
         childrenNumPartitions.max
       }