Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/8573#discussion_r39214047
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/execution/local/SampleNodeSuite.scala
---
@@ -0,0 +1,60 @@
+/*
+ * 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.sql.execution.local
+
+import org.apache.spark.sql.Column
+import org.apache.spark.sql.catalyst.expressions.{Ascending, Expression,
SortOrder}
+
+class SampleNodeSuite extends LocalNodeTest {
+
+ def columnToSortOrder(sortExprs: Column*): Seq[SortOrder] = {
+ val sortOrder: Seq[SortOrder] = sortExprs.map { col =>
+ col.expr match {
+ case expr: SortOrder =>
+ expr
+ case expr: Expression =>
+ SortOrder(expr, Ascending)
+ }
+ }
+ sortOrder
+ }
+
+ test("withReplacement: true") {
+ val seed = 0L
+ val input = sqlContext.sparkContext.
+ parallelize((1 to 10).map(i => (i, i.toString)), 1). // Should be
only 1 partition
+ toDF("key", "value")
+ checkAnswer(
+ input,
+ node => SampleNode(0.0, 0.3, true, seed, node),
+ input.sample(true, 0.3, seed).collect()
+ )
+ }
+
+ test("withReplacement: false") {
+ val seed = 0L
+ val input = sqlContext.sparkContext.
+ parallelize((1 to 10).map(i => (i, i.toString)), 1). // Should be
only 1 partition
+ toDF("key", "value")
+ checkAnswer(
+ input,
+ node => SampleNode(0.0, 0.3, false, seed, node),
+ input.sample(false, 0.3, seed).collect()
+ )
--- End diff --
this is largely duplicated. Can you put it in a `private def
testSample(withReplacement: Boolean): Unit`?
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