steveloughran commented on code in PR #1139:
URL: https://github.com/apache/parquet-mr/pull/1139#discussion_r1329958167


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parquet-hadoop/src/test/java/org/apache/parquet/hadoop/TestParquetFileWriter.java:
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@@ -89,10 +89,13 @@
 
 import org.apache.parquet.hadoop.example.GroupWriteSupport;
 import org.junit.rules.TemporaryFolder;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
 import org.mockito.Mockito;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+@RunWith(Parameterized.class)
 public class TestParquetFileWriter {

Review Comment:
   1. because it does a read afterwards.
   2. and when getting the pr to pass all the tests with vector IO turned on 
for all of them, this was one which found a bug. Parameterization ensures it 
stays fixed and with better coverage.



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