alamb commented on code in PR #4818:
URL: https://github.com/apache/arrow-datafusion/pull/4818#discussion_r1069112547


##########
datafusion/core/src/physical_plan/file_format/csv.rs:
##########
@@ -444,24 +444,11 @@ mod tests {
         assert_eq!(14, csv.schema().fields().len());
 
         let mut it = csv.execute(0, task_ctx)?;
-        let batch = it.next().await.unwrap()?;
-        assert_eq!(14, batch.num_columns());
-        assert_eq!(5, batch.num_rows());
-
-        let expected = vec![
-            
"+----+----+-----+--------+------------+----------------------+-----+-------+------------+----------------------+-------------+---------------------+--------------------------------+-------------+",
-            "| c1 | c2 | c3  | c4     | c5         | c6                   | c7 
 | c8    | c9         | c10                  | c11         | c12                
 | c13                            | missing_col |",
-            
"+----+----+-----+--------+------------+----------------------+-----+-------+------------+----------------------+-------------+---------------------+--------------------------------+-------------+",
-            "| c  | 2  | 1   | 18109  | 2033001162 | -6513304855495910254 | 25 
 | 43062 | 1491205016 | 5863949479783605708  | 0.110830784 | 0.9294097332465232 
 | 6WfVFBVGJSQb7FhA7E0lBwdvjfZnSW |             |",
-            "| d  | 5  | -40 | 22614  | 706441268  | -7542719935673075327 | 
155 | 14337 | 3373581039 | 11720144131976083864 | 0.69632107  | 
0.3114712539863804  | C2GT5KVyOPZpgKVl110TyZO0NcJ434 |             |",
-            "| b  | 1  | 29  | -18218 | 994303988  | 5983957848665088916  | 
204 | 9489  | 3275293996 | 14857091259186476033 | 0.53840446  | 
0.17909035118828576 | AyYVExXK6AR2qUTxNZ7qRHQOVGMLcz |             |",
-            "| a  | 1  | -85 | -15154 | 1171968280 | 1919439543497968449  | 77 
 | 52286 | 774637006  | 12101411955859039553 | 0.12285209  | 0.6864391962767343 
 | 0keZ5G8BffGwgF2RwQD59TFzMStxCB |             |",
-            "| b  | 5  | -82 | 22080  | 1824882165 | 7373730676428214987  | 
208 | 34331 | 3342719438 | 3330177516592499461  | 0.82634634  | 
0.40975383525297016 | Ig1QcuKsjHXkproePdERo2w0mYzIqd |             |",
-            
"+----+----+-----+--------+------------+----------------------+-----+-------+------------+----------------------+-------------+---------------------+--------------------------------+-------------+",
-        ];
-
-        crate::assert_batches_eq!(expected, &[batch]);
-
+        let err = it.next().await.unwrap().unwrap_err().to_string();

Review Comment:
   I guess I am wondering if this test should then be updated:
   1. Removed entirely (testing the csv reader error doesn't sound useful)
   2. Updated to use a non broken CSV reader
   
   I can try and look at it more carefully later today 



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