Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/20761#discussion_r218477315
--- Diff:
resource-managers/yarn/src/test/scala/org/apache/spark/deploy/yarn/ClientSuite.scala
---
@@ -35,18 +36,22 @@ import org.apache.hadoop.yarn.conf.YarnConfiguration
import org.apache.hadoop.yarn.util.Records
import org.mockito.Matchers.{eq => meq, _}
import org.mockito.Mockito._
-import org.scalatest.Matchers
+import org.scalatest.{BeforeAndAfterAll, Matchers}
import org.apache.spark.{SparkConf, SparkFunSuite, TestUtils}
import org.apache.spark.deploy.yarn.config._
import org.apache.spark.util.{SparkConfWithEnv, Utils}
-class ClientSuite extends SparkFunSuite with Matchers {
+class ClientSuite extends SparkFunSuite with Matchers with
BeforeAndAfterAll {
import Client._
var oldSystemProperties: Properties = null
+ override def beforeAll(): Unit = {
+ super.beforeAll()
--- End diff --
This is a no-op if it just calls its super class method
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