JavaFilterTest.java

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 * Pentaho Data Integration
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 * Copyright (C) 2002-2015 by Pentaho : http://www.pentaho.com
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 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with
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 *    http://www.apache.org/licenses/LICENSE-2.0
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package org.pentaho.di.trans.steps.javafilter;

import java.util.ArrayList;
import java.util.List;

import org.junit.BeforeClass;
import org.junit.Test;
import org.pentaho.di.core.KettleEnvironment;
import org.pentaho.di.core.RowMetaAndData;
import org.pentaho.di.core.exception.KettleException;
import org.pentaho.di.core.row.RowMeta;
import org.pentaho.di.core.row.value.ValueMetaString;
import org.pentaho.di.core.variables.Variables;
import org.pentaho.di.trans.TransMeta;
import org.pentaho.di.trans.TransTestFactory;

import static org.junit.Assert.assertTrue;

public class JavaFilterTest {

  private static final String realCondition = "VehicleType.equals(\"Car\")";
  private static final String stepName = "MyJavaFilter Step";
  private static final String fieldName = "VehicleType";

  @BeforeClass
  public static void before() throws KettleException {
    KettleEnvironment.init();
  }

  private static List<RowMetaAndData> getInputData() {
    List<RowMetaAndData> input = new ArrayList<RowMetaAndData>();
    RowMeta rm = new RowMeta();
    rm.addValueMeta( new ValueMetaString( fieldName ) );
    input.add( new RowMetaAndData( rm, new Object[]{ "Car" } ) );
    input.add( new RowMetaAndData( rm, new Object[]{ "Bus" } ) );

    return input;
  }

  @Test
  public void testCondition() throws KettleException {
    JavaFilterMeta meta = new JavaFilterMeta();
    meta.setCondition( realCondition );

    TransMeta trans = TransTestFactory.generateTestTransformation( null, meta, stepName );
    List<RowMetaAndData> input = getInputData();

    List<RowMetaAndData> result = TransTestFactory.executeTestTransformation( trans,
      TransTestFactory.INJECTOR_STEPNAME, stepName, TransTestFactory.DUMMY_STEPNAME, input );

    //Only the "Car" row should be returned, based upon the Java Filter condition
    assertTrue( result.size() == 1 );
    assertTrue( result.get( 0 ).getString( fieldName, null ).equals( "Car" ) );
  }

  @Test
  public void testVariableCondition() throws KettleException {
    Variables varSpace = new Variables();
    varSpace.setVariable( "myVarCondition", realCondition );

    JavaFilterMeta meta = new JavaFilterMeta();
    meta.setCondition( "${myVarCondition}" );

    TransMeta trans = TransTestFactory.generateTestTransformation( varSpace, meta, stepName );
    List<RowMetaAndData> input = getInputData();

    List<RowMetaAndData> result = TransTestFactory.executeTestTransformation( trans,
      TransTestFactory.INJECTOR_STEPNAME, stepName, TransTestFactory.DUMMY_STEPNAME, input );

    //Only the "Car" row should be returned, based upon the Java Filter condition
    assertTrue( result.size() == 1 );
    assertTrue( result.get( 0 ).getString( fieldName, null ).equals( "Car" ) );
  }
}