Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/12212#discussion_r58769039
--- Diff:
sql/core/src/test/java/test/org/apache/spark/sql/sources/JavaDatasetAggregatorSuiteBase.java
---
@@ -0,0 +1,81 @@
+/*
+ * 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 test.org.apache.spark.sql.sources;
+
+import java.io.Serializable;
+import java.util.Arrays;
+import java.util.List;
+
+import scala.Tuple2;
+
+import org.junit.After;
+import org.junit.Before;
+
+import org.apache.spark.SparkContext;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.api.java.function.MapFunction;
+import org.apache.spark.sql.Dataset;
+import org.apache.spark.sql.Encoder;
+import org.apache.spark.sql.Encoders;
+import org.apache.spark.sql.KeyValueGroupedDataset;
+import org.apache.spark.sql.test.TestSQLContext;
+
+/**
+ * Common test base shared across this and Java8DatasetAggregatorSuite.
+ */
+public class JavaDatasetAggregatorSuiteBase implements Serializable {
+ protected transient JavaSparkContext jsc;
+ protected transient TestSQLContext context;
+
+ @Before
+ public void setUp() {
+ // Trigger static initializer of TestData
+ SparkContext sc = new SparkContext("local[*]", "testing");
+ jsc = new JavaSparkContext(sc);
+ context = new TestSQLContext(sc);
+ context.loadTestData();
+ }
+
+ @After
+ public void tearDown() {
+ context.sparkContext().stop();
+ context = null;
+ jsc = null;
+ }
+
+ protected <T1, T2> Tuple2<T1, T2> tuple2(T1 t1, T2 t2) {
+ return new Tuple2<>(t1, t2);
+ }
+
+ protected KeyValueGroupedDataset<String, Tuple2<String, Integer>>
generateGroupedDataset() {
+ Encoder<Tuple2<String, Integer>> encoder =
Encoders.tuple(Encoders.STRING(), Encoders.INT());
+ List<Tuple2<String, Integer>> data =
+ Arrays.asList(tuple2("a", 1), tuple2("a", 2), tuple2("b", 3));
+ Dataset<Tuple2<String, Integer>> ds = context.createDataset(data,
encoder);
+
+ return ds.groupByKey(
+ new MapFunction<Tuple2<String, Integer>, String>() {
+ @Override
+ public String call(Tuple2<String, Integer> value) throws Exception
{
--- End diff --
Although you can remove "throws Exception" here while you're at it, it is
not important. LGTM as is
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