WeichenXu123 commented on code in PR #55763:
URL: https://github.com/apache/spark/pull/55763#discussion_r3217672463
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mllib/src/test/scala/org/apache/spark/ml/tree/impl/RandomForestSuite.scala:
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@@ -682,18 +797,45 @@ class RandomForestSuite extends SparkFunSuite with
MLlibTestSparkContext {
val rdd = sc.parallelize(arr.toImmutableArraySeq)
val numClasses = 2
- val strategy = new OldStrategy(algo = OldAlgo.Classification, impurity =
Gini, maxDepth = 4,
- numClasses = numClasses, maxBins = 32)
-
- val prunedTree = RandomForest.run(rdd, strategy, numTrees = 1,
featureSubsetStrategy = "auto",
- seed = 42, instr = None).head
-
- val unprunedTree = RandomForest.run(rdd, strategy, numTrees = 1,
featureSubsetStrategy = "auto",
- seed = 42, instr = None, prune = false).head
+ val strategy = new OldStrategy(
+ algo = OldAlgo.Classification,
+ impurity = Gini,
+ maxDepth = 4,
+ numClasses = numClasses,
+ maxBins = 32)
+
+ strategy.pruneTree = true
+ val prunedTree = RandomForest
+ .run(
+ rdd,
+ strategy,
+ numTrees = 1,
+ featureSubsetStrategy = "auto",
+ seed = 42,
+ instr = None)
+ .head
+
+ strategy.pruneTree = false
+ val unprunedTree = RandomForest
+ .run(
+ rdd,
+ strategy,
+ numTrees = 1,
+ featureSubsetStrategy = "auto",
+ seed = 42,
+ instr = None)
+ .head
+
+ strategy.pruneTree = true
+ val defaultBehaviorTree = RandomForest
+ .run(rdd, strategy, numTrees = 1, featureSubsetStrategy = "auto", seed =
42, instr = None)
+ .head
assert(prunedTree.numNodes === 5)
assert(unprunedTree.numNodes === 7)
+ assert(defaultBehaviorTree.numNodes == prunedTree.numNodes)
+
Review Comment:
no need.
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