Github user tzolov commented on a diff in the pull request:

    https://github.com/apache/incubator-hawq/pull/302#discussion_r51859883
  
    --- Diff: 
pxf/pxf-json/src/test/java/org/apache/hawq/pxf/plugins/json/PxfUnit.java ---
    @@ -0,0 +1,672 @@
    +package org.apache.hawq.pxf.plugins.json;
    +
    +/*
    + * 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
    + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    + * KIND, either express or implied.  See the License for the
    + * specific language governing permissions and limitations
    + * under the License.
    + */
    +
    +import java.io.BufferedReader;
    +import java.io.ByteArrayOutputStream;
    +import java.io.IOException;
    +import java.io.InputStreamReader;
    +import java.io.OutputStream;
    +import java.lang.reflect.Constructor;
    +import java.security.InvalidParameterException;
    +import java.util.ArrayList;
    +import java.util.HashMap;
    +import java.util.Iterator;
    +import java.util.List;
    +import java.util.Map;
    +
    +import org.apache.commons.logging.Log;
    +import org.apache.commons.logging.LogFactory;
    +import org.apache.hadoop.conf.Configuration;
    +import org.apache.hadoop.fs.FileSystem;
    +import org.apache.hadoop.fs.Path;
    +import org.apache.hawq.pxf.api.Fragment;
    +import org.apache.hawq.pxf.api.Fragmenter;
    +import org.apache.hawq.pxf.api.OneField;
    +import org.apache.hawq.pxf.api.OneRow;
    +import org.apache.hawq.pxf.api.ReadAccessor;
    +import org.apache.hawq.pxf.api.ReadResolver;
    +import org.apache.hawq.pxf.api.WriteAccessor;
    +import org.apache.hawq.pxf.api.WriteResolver;
    +import org.apache.hawq.pxf.api.io.DataType;
    +import org.apache.hawq.pxf.api.utilities.InputData;
    +import org.apache.hawq.pxf.service.FragmentsResponse;
    +import org.apache.hawq.pxf.service.FragmentsResponseFormatter;
    +import org.apache.hawq.pxf.service.utilities.ProtocolData;
    +import org.codehaus.jackson.JsonFactory;
    +import org.codehaus.jackson.JsonNode;
    +import org.codehaus.jackson.JsonParseException;
    +import org.codehaus.jackson.map.JsonMappingException;
    +import org.codehaus.jackson.map.ObjectMapper;
    +import org.junit.Assert;
    +
    +/**
    + * This abstract class contains a number of helpful utilities in 
developing a PXF extension for HAWQ. Extend this class
    + * and use the various <code>assert</code> methods to check given input 
against known output.
    + */
    +public abstract class PxfUnit {
    +
    +   private static final Log LOG = LogFactory.getLog(PxfUnit.class);
    +
    +   private static JsonFactory factory = new JsonFactory();
    +   private static ObjectMapper mapper = new ObjectMapper(factory);
    +
    +   protected static List<InputData> inputs = null;
    +
    +   /**
    +    * Uses the given input directory to run through the PXF unit testing 
framework. Uses the lines in the file for
    +    * output testing.
    +    * 
    +    * @param input
    +    *            Input records
    +    * @param expectedOutput
    +    *            File containing output to check
    +    * @throws Exception
    +    */
    +   public void assertOutput(Path input, Path expectedOutput) throws 
Exception {
    +
    +           BufferedReader rdr = new BufferedReader(new 
InputStreamReader(FileSystem.get(new Configuration()).open(
    +                           expectedOutput)));
    +
    +           List<String> outputLines = new ArrayList<String>();
    +
    +           String line;
    +           while ((line = rdr.readLine()) != null) {
    +                   outputLines.add(line);
    +           }
    +
    +           assertOutput(input, outputLines);
    +
    +           rdr.close();
    +   }
    +
    +   /**
    +    * Uses the given input directory to run through the PXF unit testing 
framework. Uses the lines in the given
    +    * parameter for output testing.
    +    * 
    +    * @param input
    +    *            Input records
    +    * @param expectedOutput
    +    *            File containing output to check
    +    * @throws Exception
    +    */
    +   public void assertOutput(Path input, List<String> expectedOutput) 
throws Exception {
    +
    +           setup(input);
    +           List<String> actualOutput = new ArrayList<String>();
    +           for (InputData data : inputs) {
    +                   ReadAccessor accessor = getReadAccessor(data);
    +                   ReadResolver resolver = getReadResolver(data);
    +
    +                   actualOutput.addAll(getAllOutput(accessor, resolver));
    +           }
    +
    +           Assert.assertFalse("Output did not match expected output", 
compareOutput(expectedOutput, actualOutput));
    +   }
    +
    +   /**
    +    * Uses the given input directory to run through the PXF unit testing 
framework. Uses the lines in the given
    +    * parameter for output testing.<br>
    +    * <br>
    +    * Ignores order of records.
    +    * 
    +    * @param input
    +    *            Input records
    +    * @param expectedOutput
    +    *            File containing output to check
    +    * @throws Exception
    +    */
    +   public void assertUnorderedOutput(Path input, Path expectedOutput) 
throws Exception {
    +           BufferedReader rdr = new BufferedReader(new 
InputStreamReader(FileSystem.get(new Configuration()).open(
    +                           expectedOutput)));
    +
    +           List<String> outputLines = new ArrayList<String>();
    +
    +           String line;
    +           while ((line = rdr.readLine()) != null) {
    +                   outputLines.add(line);
    +           }
    +
    +           assertUnorderedOutput(input, outputLines);
    +   }
    --- End diff --
    
    +1


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