[GitHub] [spark] maropu commented on a change in pull request #27836: [SPARK-31009][SQL] Support json_object_keys function

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maropu commented on a change in pull request #27836: [SPARK-31009][SQL] Support json_object_keys function
URL: https://github.com/apache/spark/pull/27836#discussion_r396159062
 
 

 ##########
 File path: sql/core/src/test/scala/org/apache/spark/sql/JsonFunctionsSuite.scala
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 @@ -710,4 +710,10 @@ class JsonFunctionsSuite extends QueryTest with SharedSparkSession {
       Seq(Row("string")))
   }
 
+  test("json_object_keys") {
+    val df = Seq("""{"a": 1, "b": 2, "c": 3}""".stripMargin)
+      .toDF("json")
 
 Review comment:
   nit: you don't need the line break here.

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