Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3330#discussion_r101765235
--- Diff:
flink-libraries/flink-table/src/test/scala/org/apache/flink/table/runtime/dataset/DataSetUserDefinedFunctionITCase.scala
---
@@ -0,0 +1,75 @@
+/*
+ * 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.flink.table.runtime.dataset
+
+import org.apache.flink.api.scala._
+import org.apache.flink.types.Row
+import
org.apache.flink.table.api.scala.batch.utils.TableProgramsClusterTestBase
+import
org.apache.flink.table.api.scala.batch.utils.TableProgramsTestBase.TableConfigMode
+import org.apache.flink.table.api.scala._
+import org.apache.flink.table.api.TableEnvironment
+import org.apache.flink.table.utils._
+import org.apache.flink.test.util.TestBaseUtils
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.Parameterized
+
+import scala.collection.JavaConverters._
+import scala.collection.mutable
+
+@RunWith(classOf[Parameterized])
+class DataSetUserDefinedFunctionITCase (
--- End diff --
The problem with many `TableProgramsClusterTestBase` ITCases classes is
that each class adds significant testing overhead. For each class, a Flink
testing cluster is started which is shared across all tests in the file. So
having a single ITCase with many tests is less of a problem than having many
classes with one test method each.
I think it makes sense to move this test to `DataSetCorrelateITCase`.
Alternatively, we can extend `TableProgramsCollectionTestBase` which does not
start a cluster but runs the program on Java collections. That should be fine
for this test.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
