Github user goldmedal commented on a diff in the pull request:
https://github.com/apache/spark/pull/18875#discussion_r137977153
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/json/JacksonGeneratorSuite.scala
---
@@ -0,0 +1,106 @@
+/*
+ * 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.catalyst.json
+
+import java.io.CharArrayWriter
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.util.{ArrayBasedMapData,
DateTimeUtils, GenericArrayData}
+import org.apache.spark.sql.types._
+import org.apache.spark.unsafe.types.UTF8String
+
+class JacksonGeneratorSuite extends SparkFunSuite {
+
+ val gmtId = DateTimeUtils.TimeZoneGMT.getID
+ val option = new JSONOptions(Map.empty, gmtId)
+ val writer = new CharArrayWriter()
+ def getAndReset(gen: JacksonGenerator): UTF8String = {
+ gen.flush()
+ val json = writer.toString
+ writer.reset()
+ UTF8String.fromString(json)
+ }
+
+ test("initial with StructType and write out a row") {
+ val dataType = StructType(StructField("a", IntegerType) :: Nil)
+ val input = InternalRow(1)
+ val gen = new JacksonGenerator(dataType, writer, option)
+ gen.write(input)
+ assert(getAndReset(gen) === UTF8String.fromString("""{"a":1}"""))
--- End diff --
Yes, maybe we can just `writer.toString` and assert it with the normal
string.
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