Github user yhuai commented on a diff in the pull request: https://github.com/apache/spark/pull/15285#discussion_r81200688 --- Diff: core/src/test/scala/org/apache/spark/util/FileAppenderSuite.scala --- @@ -292,8 +332,20 @@ class FileAppenderSuite extends SparkFunSuite with BeforeAndAfter with Logging { testFile.getParentFile.toString, testFile.getName) logInfo("Filtered files: \n" + generatedFiles.mkString("\n")) assert(generatedFiles.size > 1) + if (isCompressed) { + assert(generatedFiles.filter(_.getName.endsWith(".gz")).size > 0) + } val allText = generatedFiles.map { file => - Files.toString(file, StandardCharsets.UTF_8) + if (file.getName.endsWith(".gz")) { --- End diff -- same as https://github.com/apache/spark/pull/15285/files#r81200650
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