contrib/src/test/java/com/datatorrent/contrib/jython/PythonOperatorTest.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 com.datatorrent.contrib.jython;

import java.util.HashMap;

import org.junit.Assert;
import org.junit.Test;
import org.python.core.PyInteger;

import com.datatorrent.lib.testbench.CollectorTestSink;

/**
 * Unit test for PythonOperator.
 *
 */
public class PythonOperatorTest
{
  @SuppressWarnings({"rawtypes", "unchecked"})
  @Test
  public void testJavaOperator()
  {
    PythonOperator oper = new PythonOperator();
    String setupScript = "import operator\n";
    setupScript += "def square():\n";
    setupScript += "  return val*val\n\n";
    oper.addSetupScript(setupScript);
    oper.setScript("square()");
    oper.setPassThru(true);

    CollectorTestSink sink = new CollectorTestSink();
    oper.result.setSink(sink);
    HashMap<String, Object> tuple = new HashMap<String, Object>();
    tuple.put("val", new Integer(2));
    oper.setup(null);
    oper.beginWindow(0);
    oper.inBindings.process(tuple);
    oper.endWindow();

    Assert.assertEquals("number emitted tuples", 1, sink.collectedTuples.size());
    for (Object o : sink.collectedTuples) {
      PyInteger val = (PyInteger)o;
      Assert.assertEquals("emitted should be 4", new Integer(4),
                          (Integer)val.__tojava__(Integer.class));
    }
  }

}