maropu commented on a change in pull request #31449:
URL: https://github.com/apache/spark/pull/31449#discussion_r569201299
##########
File path:
sql/core/src/test/scala/org/apache/spark/sql/execution/DataSourceScanExecRedactionSuite.scala
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@@ -122,24 +123,45 @@ class DataSourceScanExecRedactionSuite extends
DataSourceScanRedactionTest {
test("SPARK-31793: FileSourceScanExec metadata should contain limited file
paths") {
withTempPath { path =>
val dir = path.getCanonicalPath
+
+ // create a sub-directory with long name so that each root path will
always exceed the limit
+ // this is to ensure we always test the case for the path truncation
+ // 110 = limit 100 + margin 10 to clearly avoid edge case
+ val dataDir = if (dir.length >= 110) {
Review comment:
nit comment; for test simplicity, how about always creating a new dir
with fixed-length long name (e.g., 110?) instead of checking the length (`if
(dir.length >= 110)`)?
```
val tooLongDirName = Random.alphanumeric.take(110).toList.mkString
val f = new File(path, tooLongDirName)
f.mkdir()
```
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