alamb commented on a change in pull request #1156:
URL: https://github.com/apache/arrow-rs/pull/1156#discussion_r782408341



##########
File path: parquet/src/arrow/arrow_reader.rs
##########
@@ -511,10 +547,7 @@ mod tests {
                 num_row_groups,
                 num_rows,
                 record_batch_size,
-                null_percent: None,
-                max_data_page_size: 1024 * 1024,
-                max_dict_page_size: 1024 * 1024,
-                writer_version: WriterVersion::PARQUET_1_0,
+                ..Default::default()

Review comment:
       I double checked that these are the same values as in `impl Default for 
TestOptions` 👍 

##########
File path: parquet/src/arrow/arrow_reader.rs
##########
@@ -382,21 +405,28 @@ mod tests {
 
     #[test]
     fn test_utf8_single_column_reader_test() {
+        let encodings = &[
+            Encoding::PLAIN,
+            Encoding::RLE_DICTIONARY,
+            //Encoding::DELTA_LENGTH_BYTE_ARRAY,

Review comment:
       
https://github.com/tustvold/arrow-rs/blob/fuzz-different-encoding/parquet/src/arrow/arrow_array_reader.rs#L543
   
   Looks like that came in with the original array reader in  #384 from 
@yordan-pavlov 
   
   Do you think it would be a good exercise to support DELTA_LENGTH_BYTE_ARRAY 
in the reader? If so, I can file a ticket and see if anyone else is interested 
in picking it up

##########
File path: parquet/src/arrow/arrow_reader.rs
##########
@@ -358,7 +369,13 @@ mod tests {
             FixedSizeBinaryArray,
             FixedSizeArrayConverter,
             RandFixedLenGen,
-        >(20, ConvertedType::NONE, None, &converter);
+        >(
+            20,
+            ConvertedType::NONE,
+            None,
+            &converter,
+            &[Encoding::PLAIN, Encoding::RLE_DICTIONARY],

Review comment:
       Is the reason not to include `DELTA_BINARY_PACKED` here that that 
encoding is not supported for `FixedLengthByteArrays`?




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