LuciferYang commented on code in PR #41815:
URL: https://github.com/apache/spark/pull/41815#discussion_r1249336113
##########
streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala:
##########
@@ -476,7 +476,9 @@ class BatchedWriteAheadLogSuite extends
CommonWriteAheadLogTests(
val batchedWal = new BatchedWriteAheadLog(wal, sparkConf)
val e = intercept[SparkException] {
- val buffer = mock[ByteBuffer]
+ // SPARK-40731: Use a 0 size `ByteBuffer` instead of `mock[ByteBuffer]`
+ // due to mockito 4 can't mock/spy sealed class
+ val buffer = ByteBuffer.allocate(0)
Review Comment:
or should we
```
val buffer = if (SystemUtils.isJavaVersionAtMost(JavaVersion.JAVA_17))
{
mock[ByteBuffer]
} else {
ByteBuffer.allocate(0)
}
```
~but this need add commons-lang3 as test dependency for `steaming` module~
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