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[Minor][ML]Minor correction in the powerIterationSuite #21689

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[Minor][ML]Minor correction in the powerIterationSuite #21689

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7b52f1e
Minor correction in the powerIterationSuite
shahidki31 Jul 1, 2018
a591e4f
Modifications: Minor correction in the powerIterationSuite
shahidki31 Jul 4, 2018
6cee6f0
Minor correction in the powerIterationSuite
shahidki31 Jul 4, 2018
b02cae5
[Modifications]Minor correction in the powerIterationSuite
shahidki31 Jul 4, 2018
79447fa
checkStyle: Minor correction in the powerIterationSuite
shahidki31 Jul 4, 2018
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30 changes: 20 additions & 10 deletions mllib/src/test/scala/org/apache/spark/ml/clustering/PowerIterationClusteringSuite.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,8 @@

package org.apache.spark.ml.clustering

import scala.collection.mutable

import org.apache.spark.{SparkException, SparkFunSuite}
import org.apache.spark.ml.util.DefaultReadWriteTest
import org.apache.spark.mllib.util.MLlibTestSparkContext
Expand Down Expand Up @@ -76,23 +78,31 @@ class PowerIterationClusteringSuite extends SparkFunSuite
.setMaxIter(40)
.setWeightCol("weight")
.assignClusters(data)
val localAssignments = assignments
.select('id, 'cluster)
.as[(Long, Int)].collect().toSet
val expectedResult = (0 until n1).map(x => (x, 1)).toSet ++
(n1 until n).map(x => (x, 0)).toSet
assert(localAssignments === expectedResult)
.select("id", "cluster")
.as[(Long, Int)]
.collect()

val predictions = Array.fill(2)(mutable.Set.empty[Long])
assignments.foreach {
case (id, cluster) => predictions(cluster) += id
}
assert(predictions.toSet === Set((0 until n1).toSet, (n1 until n).toSet))

val assignments2 = new PowerIterationClustering()
.setK(2)
.setMaxIter(10)
.setInitMode("degree")
.setWeightCol("weight")
.assignClusters(data)
val localAssignments2 = assignments2
.select('id, 'cluster)
.as[(Long, Int)].collect().toSet
assert(localAssignments2 === expectedResult)
.select("id", "cluster")
.as[(Long, Int)]
.collect()

val predictions2 = Array.fill(2)(mutable.Set.empty[Long])
assignments2.foreach {
case (id, cluster) => predictions2(cluster) += id
}
assert(predictions2.toSet === Set((0 until n1).toSet, (n1 until n).toSet))
}

test("supported input types") {
Expand Down