[GitHub] [spark] amaliujia commented on a diff in pull request #40466: [SPARK-42835][SQL][TESTS] Add test cases for `Column.explain`

["amaliujia (via GitHub)" <gi...@apache.org>]

amaliujia commented on code in PR #40466:
URL: https://github.com/apache/spark/pull/40466#discussion_r1141519677


##########
sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala:
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@@ -921,6 +922,132 @@ class ColumnExpressionSuite extends QueryTest with SharedSparkSession {
     }
   }
 
+  private def captureStdOut(block: => Unit): String = {
+    val capturedOut = new ByteArrayOutputStream()
+    Console.withOut(capturedOut)(block)
+    capturedOut.toString()
+  }
+
+  test("explain") {

Review Comment:
   yeah that was what I was wondering if this output is expected stable enough. If not then probably we should not add such tests.



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