Github user mallman commented on a diff in the pull request:
https://github.com/apache/spark/pull/16578#discussion_r148725482
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/execution/FileSchemaPruningTest.scala
---
@@ -0,0 +1,53 @@
+/*
+ * 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
+
+import org.scalactic.Equality
+import org.scalatest.Assertions
+
+import org.apache.spark.sql.DataFrame
+import org.apache.spark.sql.catalyst.parser.CatalystSqlParser
+import org.apache.spark.sql.types.StructType
+
+private[sql] trait FileSchemaPruningTest {
+ _: Assertions =>
+
+ private val schemaEquality = new Equality[StructType] {
+ override def areEqual(a: StructType, b: Any) =
+ b match {
+ case otherType: StructType => a sameType otherType
+ case _ => false
+ }
+ }
+
+ protected def checkScanSchemata(df: DataFrame,
expectedSchemaCatalogStrings: String*): Unit = {
+ val fileSourceScanSchemata =
--- End diff --
`fileSourceScanSchemata` is a `Seq[StructType]`, so I made it plural.
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