[GitHub] [arrow] patrickpai commented on a change in pull request #7789: PARQUET-1878: [C++] lz4 codec is not compatible with Hadoop Lz4Codec

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patrickpai commented on a change in pull request #7789:
URL: https://github.com/apache/arrow/pull/7789#discussion_r456645709



##########
File path: cpp/src/parquet/reader_test.cc
##########
@@ -58,6 +58,63 @@ std::string nation_dict_truncated_data_page() {
   return data_file("nation.dict-malformed.parquet");
 }
 
+std::string hadoop_lz4_compressed() { return data_file("hadoop_lz4_compressed.parquet"); }
+
+// TODO: Assert on definition and repetition levels
+template <typename DType, typename ValueType>
+void ASSERT_BATCH_EQUAL(std::shared_ptr<TypedColumnReader<DType>> col, int64_t batch_size,

Review comment:
       Good point - changed to AssertColumnValues




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