[SPARK-7558] Demarcate tests in unit-tests.log

Right now `unit-tests.log` are not of much value because we can't tell where the test boundaries are easily. This patch adds log statements before and after each test to outline the test boundaries, e.g.:

```
===== TEST OUTPUT FOR o.a.s.serializer.KryoSerializerSuite: 'kryo with parallelize for primitive arrays' =====

15/05/27 12:36:39.596 pool-1-thread-1-ScalaTest-running-KryoSerializerSuite INFO SparkContext: Starting job: count at KryoSerializerSuite.scala:230
15/05/27 12:36:39.596 dag-scheduler-event-loop INFO DAGScheduler: Got job 3 (count at KryoSerializerSuite.scala:230) with 4 output partitions (allowLocal=false)
15/05/27 12:36:39.596 dag-scheduler-event-loop INFO DAGScheduler: Final stage: ResultStage 3(count at KryoSerializerSuite.scala:230)
15/05/27 12:36:39.596 dag-scheduler-event-loop INFO DAGScheduler: Parents of final stage: List()
15/05/27 12:36:39.597 dag-scheduler-event-loop INFO DAGScheduler: Missing parents: List()
15/05/27 12:36:39.597 dag-scheduler-event-loop INFO DAGScheduler: Submitting ResultStage 3 (ParallelCollectionRDD[5] at parallelize at KryoSerializerSuite.scala:230), which has no missing parents

...

15/05/27 12:36:39.624 pool-1-thread-1-ScalaTest-running-KryoSerializerSuite INFO DAGScheduler: Job 3 finished: count at KryoSerializerSuite.scala:230, took 0.028563 s
15/05/27 12:36:39.625 pool-1-thread-1-ScalaTest-running-KryoSerializerSuite INFO KryoSerializerSuite:

***** FINISHED o.a.s.serializer.KryoSerializerSuite: 'kryo with parallelize for primitive arrays' *****

...
```

Author: Andrew Or <[email protected]>

Closes #6441 from andrewor14/demarcate-tests and squashes the following commits:

879b060 [Andrew Or] Fix compile after rebase
d622af7 [Andrew Or] Merge branch 'master' of github.com:apache/spark into demarcate-tests
017c8ba [Andrew Or] Merge branch 'master' of github.com:apache/spark into demarcate-tests
7790b6c [Andrew Or] Fix tests after logical merge conflict
c7460c0 [Andrew Or] Merge branch 'master' of github.com:apache/spark into demarcate-tests
c43ffc4 [Andrew Or] Fix tests?
8882581 [Andrew Or] Fix tests
ee22cda [Andrew Or] Fix log message
fa9450e [Andrew Or] Merge branch 'master' of github.com:apache/spark into demarcate-tests
12d1e1b [Andrew Or] Various whitespace changes (minor)
69cbb24 [Andrew Or] Make all test suites extend SparkFunSuite instead of FunSuite
bbce12e [Andrew Or] Fix manual things that cannot be covered through automation
da0b12f [Andrew Or] Add core tests as dependencies in all modules
f7d29ce [Andrew Or] Introduce base abstract class for all test suites

Author: Andrew Or

bagel/pom.xml

@@ -40,6 +40,13 @@
       <artifactId>spark-core_${scala.binary.version}</artifactId>
       <version>${project.version}</version>
     </dependency>
+    <dependency>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-core_${scala.binary.version}</artifactId>
+      <version>${project.version}</version>
+      <type>test-jar</type>
+      <scope>test</scope>
+    </dependency>
     <dependency>
       <groupId>org.scalacheck</groupId>
       <artifactId>scalacheck_${scala.binary.version}</artifactId>

bagel/src/test/scala/org/apache/spark/bagel/BagelSuite.scala

@@ -17,7 +17,7 @@
 
 package org.apache.spark.bagel
 
-import org.scalatest.{BeforeAndAfter, FunSuite, Assertions}
+import org.scalatest.{BeforeAndAfter, Assertions}
 import org.scalatest.concurrent.Timeouts
 import org.scalatest.time.SpanSugar._
 
@@ -27,7 +27,7 @@ import org.apache.spark.storage.StorageLevel
 class TestVertex(val active: Boolean, val age: Int) extends Vertex with Serializable
 class TestMessage(val targetId: String) extends Message[String] with Serializable
 
-class BagelSuite extends FunSuite with Assertions with BeforeAndAfter with Timeouts {
+class BagelSuite extends SparkFunSuite with Assertions with BeforeAndAfter with Timeouts {
 
   var sc: SparkContext = _
 

core/pom.xml

@@ -338,6 +338,12 @@
     <dependency>
       <groupId>org.seleniumhq.selenium</groupId>
       <artifactId>selenium-java</artifactId>
+      <exclusions>
+        <exclusion>
+          <groupId>com.google.guava</groupId>
+          <artifactId>guava</artifactId>
+        </exclusion>
+      </exclusions>
       <scope>test</scope>
     </dependency>
     <!-- Added for selenium: -->

core/src/test/scala/org/apache/spark/AccumulatorSuite.scala

@@ -20,11 +20,10 @@ package org.apache.spark
 import scala.collection.mutable
 import scala.ref.WeakReference
 
-import org.scalatest.FunSuite
 import org.scalatest.Matchers
 
 
-class AccumulatorSuite extends FunSuite with Matchers with LocalSparkContext {
+class AccumulatorSuite extends SparkFunSuite with Matchers with LocalSparkContext {
 
 
   implicit def setAccum[A]: AccumulableParam[mutable.Set[A], A] =

core/src/test/scala/org/apache/spark/CacheManagerSuite.scala

@@ -18,15 +18,15 @@
 package org.apache.spark
 
 import org.mockito.Mockito._
-import org.scalatest.{BeforeAndAfter, FunSuite}
+import org.scalatest.BeforeAndAfter
 import org.scalatest.mock.MockitoSugar
 
 import org.apache.spark.executor.DataReadMethod
 import org.apache.spark.rdd.RDD
 import org.apache.spark.storage._
 
 // TODO: Test the CacheManager's thread-safety aspects
-class CacheManagerSuite extends FunSuite with LocalSparkContext with BeforeAndAfter
+class CacheManagerSuite extends SparkFunSuite with LocalSparkContext with BeforeAndAfter
   with MockitoSugar {
 
   var blockManager: BlockManager = _

core/src/test/scala/org/apache/spark/CheckpointSuite.scala

@@ -21,13 +21,11 @@ import java.io.File
 
 import scala.reflect.ClassTag
 
-import org.scalatest.FunSuite
-
 import org.apache.spark.rdd._
 import org.apache.spark.storage.{BlockId, StorageLevel, TestBlockId}
 import org.apache.spark.util.Utils
 
-class CheckpointSuite extends FunSuite with LocalSparkContext with Logging {
+class CheckpointSuite extends SparkFunSuite with LocalSparkContext with Logging {
   var checkpointDir: File = _
   val partitioner = new HashPartitioner(2)
 

core/src/test/scala/org/apache/spark/ContextCleanerSuite.scala

@@ -23,7 +23,7 @@ import scala.collection.mutable.{HashSet, SynchronizedSet}
 import scala.language.existentials
 import scala.util.Random
 
-import org.scalatest.{BeforeAndAfter, FunSuite}
+import org.scalatest.BeforeAndAfter
 import org.scalatest.concurrent.{PatienceConfiguration, Eventually}
 import org.scalatest.concurrent.Eventually._
 import org.scalatest.time.SpanSugar._
@@ -44,7 +44,7 @@ import org.apache.spark.storage.ShuffleIndexBlockId
  * config options, in particular, a different shuffle manager class
  */
 abstract class ContextCleanerSuiteBase(val shuffleManager: Class[_] = classOf[HashShuffleManager])
-  extends FunSuite with BeforeAndAfter with LocalSparkContext
+  extends SparkFunSuite with BeforeAndAfter with LocalSparkContext
 {
   implicit val defaultTimeout = timeout(10000 millis)
   val conf = new SparkConf()

core/src/test/scala/org/apache/spark/DistributedSuite.scala

@@ -17,7 +17,6 @@
 
 package org.apache.spark
 
-import org.scalatest.FunSuite
 import org.scalatest.concurrent.Timeouts._
 import org.scalatest.Matchers
 import org.scalatest.time.{Millis, Span}
@@ -28,7 +27,7 @@ class NotSerializableClass
 class NotSerializableExn(val notSer: NotSerializableClass) extends Throwable() {}
 
 
-class DistributedSuite extends FunSuite with Matchers with LocalSparkContext {
+class DistributedSuite extends SparkFunSuite with Matchers with LocalSparkContext {
 
   val clusterUrl = "local-cluster[2,1,512]"
 

core/src/test/scala/org/apache/spark/DriverSuite.scala

@@ -19,14 +19,13 @@ package org.apache.spark
 
 import java.io.File
 
-import org.scalatest.FunSuite
 import org.scalatest.concurrent.Timeouts
 import org.scalatest.prop.TableDrivenPropertyChecks._
 import org.scalatest.time.SpanSugar._
 
 import org.apache.spark.util.Utils
 
-class DriverSuite extends FunSuite with Timeouts {
+class DriverSuite extends SparkFunSuite with Timeouts {
 
   ignore("driver should exit after finishing without cleanup (SPARK-530)") {
     val sparkHome = sys.props.getOrElse("spark.test.home", fail("spark.test.home is not set!"))

core/src/test/scala/org/apache/spark/ExecutorAllocationManagerSuite.scala

@@ -19,7 +19,7 @@ package org.apache.spark
 
 import scala.collection.mutable
 
-import org.scalatest.{BeforeAndAfter, FunSuite, PrivateMethodTester}
+import org.scalatest.{BeforeAndAfter, PrivateMethodTester}
 import org.apache.spark.executor.TaskMetrics
 import org.apache.spark.scheduler._
 import org.apache.spark.scheduler.cluster.ExecutorInfo
@@ -28,7 +28,11 @@ import org.apache.spark.util.ManualClock
 /**
  * Test add and remove behavior of ExecutorAllocationManager.
  */
-class ExecutorAllocationManagerSuite extends FunSuite with LocalSparkContext with BeforeAndAfter {
+class ExecutorAllocationManagerSuite
+  extends SparkFunSuite
+  with LocalSparkContext
+  with BeforeAndAfter {
+
   import ExecutorAllocationManager._
   import ExecutorAllocationManagerSuite._