Github user yinxusen commented on a diff in the pull request:
https://github.com/apache/spark/pull/7842#discussion_r43216191
--- Diff:
mllib/src/test/scala/org/apache/spark/mllib/pmml/export/DecisionTreePMMLModelExportSuite.scala
---
@@ -0,0 +1,431 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.mllib.pmml.export
+
+import scala.collection.JavaConverters._
+
+import org.dmg.pmml._
+import org.dmg.pmml.CompoundPredicate.BooleanOperator
+import org.scalatest.PrivateMethodTester
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.mllib.tree.configuration.{Algo, FeatureType}
+import org.apache.spark.mllib.tree.model.{DecisionTreeModel, Node,
Predict, Split}
+import org.apache.spark.mllib.util.MLlibTestSparkContext
+
+class DecisionTreePMMLModelExportSuite extends SparkFunSuite
+with MLlibTestSparkContext
+with PrivateMethodTester {
+
+ test("PMML export should work as expected for DecisionTree model with
regressor") {
+
+ // instantiate a MLLib DecisionTreeModel with Regression and with 3
nodes with continuous
+ // feature type
+ val mlLeftNode = new Node(2, new Predict(0.5, 0.5), 0.2, true, None,
None, None, None)
+ val mlRightNode = new Node(3, new Predict(1.0, 0.5), 0.2, true, None,
None, None, None)
+ val split = new Split(100, 10.00, FeatureType.Continuous, Nil)
+ val mlTopNode = new Node(1, new Predict(0.0, 0.1), 0.2, false,
+ Some(split), Some(mlLeftNode), Some(mlRightNode), None)
+
+ val decisionTreeModel = new DecisionTreeModel(mlTopNode,
Algo.Regression)
+
+ // get the pmml exporter for the DT and verify its the right exporter
+ val pmmlExporterForDT =
PMMLModelExportFactory.createPMMLModelExport(decisionTreeModel)
+ assert(pmmlExporterForDT.isInstanceOf[DecisionTreePMMLModelExport])
+
+ // get the pmmlwrapper object for DT and verify the inner model is of
type TreeModel
+ // and basic fields are populated as expected
+ val pmmlWrapperForDT = pmmlExporterForDT.getPmml
+ assert(pmmlWrapperForDT.getHeader.getDescription == "decision tree")
+ assert(!pmmlWrapperForDT.getModels.isEmpty)
+ assert(pmmlWrapperForDT.getModels.size() == 1)
+ val pmmlModelForDT = pmmlWrapperForDT.getModels.get(0)
+ assert(pmmlModelForDT.isInstanceOf[TreeModel])
+
+ // validate the inner tree model fields are populated as expected
+ val pmmlTreeModel = pmmlModelForDT.asInstanceOf[TreeModel]
+ assert(pmmlTreeModel.getFunctionName == MiningFunctionType.REGRESSION)
+
+ // validate the root PMML node is populated as expected
+ val pmmlRootNode = pmmlTreeModel.getNode
+ assert(pmmlRootNode != null)
+ assert(pmmlRootNode.getNodes != null && pmmlRootNode.getNodes.size()
== 2)
+ assert(pmmlRootNode.getId === "1")
+ // validate the root node predicate is populated as expected
+ val predicate = pmmlRootNode.getPredicate()
+ assert(predicate != null)
+ assert(predicate.isInstanceOf[True])
+
+ // validate the left node is populated as expected
+ val pmmlLeftNode = pmmlRootNode.getNodes.get(0)
+ assert(pmmlLeftNode != null)
+ assert(!pmmlLeftNode.hasNodes)
+ assert(pmmlLeftNode.getId === "2")
+ assert(pmmlLeftNode.getScore == "0.5")
+ val predicate1 = pmmlLeftNode.getPredicate
+ assert(predicate1 != null)
+ assert(predicate1.isInstanceOf[SimplePredicate])
+ assert(predicate1.asInstanceOf[SimplePredicate].getField.getValue ===
"field_100")
+ assert(predicate1.asInstanceOf[SimplePredicate].getValue === "10.0")
+ assert(predicate1.asInstanceOf[SimplePredicate].getOperator ==
SimplePredicate.Operator
+ .LESS_OR_EQUAL)
--- End diff --
the indent should be 2 spaces.
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