test/org/apache/pig/test/TestUDFWithoutParameter.java

/*
 * 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.
 */
package org.apache.pig.test;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Iterator;

import junit.framework.TestCase;

import org.apache.pig.ExecType;
import org.apache.pig.PigServer;
import org.apache.pig.data.Tuple;

public class TestUDFWithoutParameter extends TestCase {

	static String[] ScriptStatement = { "A = LOAD 'test/org/apache/pig/test/data/passwd' USING PigStorage();",
			"B = FOREACH A GENERATE org.apache.pig.test.utils.MyUDFWithoutParameter();" };

	static File TempScriptFile = null;

	@Override
	protected void setUp() throws Exception {
		TempScriptFile = File.createTempFile("temp_jira_753", ".pig");
		FileWriter writer=new FileWriter(TempScriptFile);
		for (String line:ScriptStatement){
			writer.write(line+"\n");
		}
		writer.close();
	}

	public void testUDFWithoutParameter() {
		try {
			PigServer pig = new PigServer(ExecType.LOCAL);
			pig.registerScript(TempScriptFile.getAbsolutePath());
			
			Iterator<Tuple> iterator=pig.openIterator("B");
			int index=0;
			while(iterator.hasNext()){
				Tuple tuple=iterator.next();
				index++;
				int result=(Integer)tuple.get(0);
				assertEquals(result, index);
			}
		} catch (IOException e) {
			e.printStackTrace();
			fail();
		}
	}
	
	@Override
	protected void tearDown() throws Exception {
		TempScriptFile.delete();
	}
}