Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/22213#discussion_r216094096
--- Diff: core/src/test/scala/org/apache/spark/util/UtilsSuite.scala ---
@@ -1205,6 +1205,39 @@ class UtilsSuite extends SparkFunSuite with
ResetSystemProperties with Logging {
assert(Utils.stringHalfWidth("\u0967\u0968\u0969") == 3)
// scalastyle:on nonascii
}
+
+ test("trimExceptCRLF standalone") {
+ val crlfSet = Set("\r", "\n")
+ val nonPrintableButCRLF =
+ (0 to 32).map(_.toChar.toString).toSet -- crlfSet
+
+ // identity for CRLF
+ crlfSet
+ .foreach(s => Utils.trimExceptCRLF(s) === s)
+
+ // empty for other non-printables
+ nonPrintableButCRLF
+ .foreach(s => assert(Utils.trimExceptCRLF(s) === ""))
+
+ // identity for a printable string
+ assert(Utils.trimExceptCRLF("a") === "a")
+
+ // identity for strings with CRLF
+ crlfSet
+ .foreach { s =>
--- End diff --
nit: keep in previous line (also below).
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