rdblue commented on a change in pull request #843: [WIP] InputFormat support 
for Iceberg
URL: https://github.com/apache/incubator-iceberg/pull/843#discussion_r398054646

 File path: mr/src/test/java/org/apache/iceberg/mr/TestIcebergInputFormat.java
 @@ -0,0 +1,242 @@
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.iceberg.mr;
+import com.google.common.collect.FluentIterable;
+import com.google.common.collect.ImmutableMap;
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+import java.util.function.Function;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.mapreduce.InputSplit;
+import org.apache.hadoop.mapreduce.Job;
+import org.apache.hadoop.mapreduce.RecordReader;
+import org.apache.hadoop.mapreduce.TaskAttemptContext;
+import org.apache.hadoop.mapreduce.TaskAttemptID;
+import org.apache.hadoop.mapreduce.task.TaskAttemptContextImpl;
+import org.apache.iceberg.DataFile;
+import org.apache.iceberg.DataFiles;
+import org.apache.iceberg.FileFormat;
+import org.apache.iceberg.Files;
+import org.apache.iceberg.PartitionSpec;
+import org.apache.iceberg.Schema;
+import org.apache.iceberg.StructLike;
+import org.apache.iceberg.Table;
+import org.apache.iceberg.TableProperties;
+import org.apache.iceberg.TestHelpers.Row;
+import org.apache.iceberg.avro.Avro;
+import org.apache.iceberg.catalog.Catalog;
+import org.apache.iceberg.catalog.TableIdentifier;
+import org.apache.iceberg.data.RandomGenericData;
+import org.apache.iceberg.data.Record;
+import org.apache.iceberg.data.avro.DataWriter;
+import org.apache.iceberg.data.parquet.GenericParquetWriter;
+import org.apache.iceberg.hadoop.HadoopCatalog;
+import org.apache.iceberg.hadoop.HadoopTables;
+import org.apache.iceberg.io.FileAppender;
+import org.apache.iceberg.parquet.Parquet;
+import org.apache.iceberg.types.Types;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import static org.apache.iceberg.types.Types.NestedField.required;
+public class TestIcebergInputFormat {
 Review comment:
   We also need tests that use the MR framework, not just tests that 
independently use the input format API.
   You can use [this s3committer 
 as an example. That test uses a mock to test s3 that isn't needed, but it 
shows how to bring up a test DFS and MR cluster.

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