Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/19861#discussion_r156970195
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/sources/v2/DataSourceV2UtilsSuite.scala
---
@@ -0,0 +1,43 @@
+/*
+ * 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.sources.v2
+
+import org.apache.spark.sql.QueryTest
+import org.apache.spark.sql.execution.datasources.v2.DataSourceV2Utils
+import org.apache.spark.sql.internal.SQLConf
+import org.apache.spark.sql.test.SharedSQLContext
+
+class DataSourceV2UtilsSuite extends QueryTest with SharedSQLContext {
+
+ private val keyPrefix = "userDefinedDataSource"
+
+ test("method withSessionConfig() should propagate session configs
correctly") {
+ // Only match configs with keys start with
"spark.datasource.${keyPrefix}".
+ withSQLConf(s"spark.datasource.$keyPrefix.foo.bar" -> "false",
--- End diff --
We don't need this heavy `withConf` stuff, just
```
val conf = new SQLConf
conf.set(...)
...
```
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