Github user viirya commented on a diff in the pull request:

    https://github.com/apache/spark/pull/13909#discussion_r87685165
  
    --- Diff: 
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ExpressionEvalHelper.scala
 ---
    @@ -43,11 +43,38 @@ trait ExpressionEvalHelper extends 
GeneratorDrivenPropertyChecks {
     
       protected def checkEvaluation(
           expression: => Expression, expected: Any, inputRow: InternalRow = 
EmptyRow): Unit = {
    -    val catalystValue = CatalystTypeConverters.convertToCatalyst(expected)
    +    // No codegen version expects GenericArrayData
    +    val catalystValue = expected match {
    --- End diff --
    
    This is still looks weird to me.
    
    Actually you need this because you replace `Seq` with `Array` in 
`test("CreateArray")` at `ComplexTypeSuite.scala`.
    
    Can we not change `Seq` to `Array` in `ComplexTypeSuite`?  We actually can 
convert `Seq` to `Array` for unsafe version only in `convertToCatalystUnsafe` 
if we move `convertToCatalystUnsafe` to `ExpressionEvalHelper.scala`.
    
    No other place uses this `convertToCatalystUnsafe`, I think.


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