Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/7250#discussion_r34420008
--- Diff:
streaming/src/test/scala/org/apache/spark/streaming/StreamingContextSuite.scala
---
@@ -21,17 +21,23 @@ import java.io.{File, NotSerializableException}
import java.util.concurrent.atomic.AtomicInteger
import org.apache.commons.io.FileUtils
+import org.apache.spark.metrics.MetricsSystem
+import org.apache.spark.metrics.source.Source
import org.scalatest.concurrent.Eventually._
import org.scalatest.concurrent.Timeouts
import org.scalatest.exceptions.TestFailedDueToTimeoutException
import org.scalatest.time.SpanSugar._
-import org.scalatest.{Assertions, BeforeAndAfter}
+import org.scalatest.{PrivateMethodTester, Assertions, BeforeAndAfter}
import org.apache.spark.storage.StorageLevel
import org.apache.spark.streaming.dstream.DStream
import org.apache.spark.streaming.receiver.Receiver
import org.apache.spark.util.Utils
-import org.apache.spark.{Logging, SparkConf, SparkContext, SparkException,
SparkFunSuite}
+
+import org.apache.spark._
--- End diff --
I wouldn't make this a _ import. Leave it as it was. ALso I think the
collection imports become unnecessary; see below
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