Github user adamjshook commented on a diff in the pull request:
https://github.com/apache/incubator-hawq/pull/302#discussion_r52078650
--- 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;
--- End diff --
I took some inspiration from MRUnit and wanted to mock the execution
framework of PXF. I imagine it could use some work, but I think it would be
very beneficial in the long run for developers to do some testing of their
extensions without having to install it on a HAWQ system.
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