Github user mgaido91 commented on a diff in the pull request:
https://github.com/apache/spark/pull/20649#discussion_r170256385
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/StructTypeSuite.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
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.sql.types.StructType
+
+class StructTypeSuite extends SparkFunSuite {
+
+ test("SPARK-23462 lookup a single missing field should output existing
fields") {
+ val s = StructType.fromDDL("a INT, b STRING")
+ val e = intercept[IllegalArgumentException](s("c")).getMessage
+ assert(e.contains("Available fields: a,b"))
+ }
+
+ test("SPARK-23462 lookup a set of missing fields should output existing
fields") {
+ val s = StructType.fromDDL("a INT, b STRING")
+ val e = intercept[IllegalArgumentException](s(Set("a",
"c"))).getMessage
+ assert(e.contains("Available fields: a,b"))
+ }
+
+ test("SPARK-23462 lookup fieldIndex for missing field should output
existing fields") {
+ val s = StructType.fromDDL("a INT, b STRING")
+ val e =
intercept[IllegalArgumentException](s.fieldIndex("c")).getMessage
+ assert(e.contains("Available fields: a,b"))
+ }
+
--- End diff --
nit: this empty line should be removed
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