Github user yanboliang commented on a diff in the pull request:
https://github.com/apache/spark/pull/13981#discussion_r69410786
--- Diff:
mllib/src/test/scala/org/apache/spark/ml/regression/DecisionTreeRegressorSuite.scala
---
@@ -36,10 +37,21 @@ class DecisionTreeRegressorSuite
private var categoricalDataPointsRDD: RDD[LabeledPoint] = _
+ private var toyData: RDD[LabeledPoint] = _
+
override def beforeAll() {
super.beforeAll()
+
categoricalDataPointsRDD =
sc.parallelize(OldDecisionTreeSuite.generateCategoricalDataPoints().map(_.asML))
+ toyData = sc.parallelize(Seq(
--- End diff --
Move ```toyData``` to ```TreeTests```. You can refer [Feature importance
with toy
data](https://github.com/apache/spark/blob/master/mllib/src/test/scala/org/apache/spark/ml/regression/DecisionTreeRegressorSuite.scala#L108).
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