org.apache.solr.client.solrj.io.stream.eval.ConversionEvaluatorsTest.java Source code

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/*
 * 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.solr.client.solrj.io.stream.eval;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.collections.map.HashedMap;
import org.apache.solr.client.solrj.io.Tuple;
import org.apache.solr.client.solrj.io.eval.ConversionEvaluator;
import org.apache.solr.client.solrj.io.eval.RawValueEvaluator;
import org.apache.solr.client.solrj.io.eval.StreamEvaluator;
import org.apache.solr.client.solrj.io.stream.StreamContext;
import org.apache.solr.client.solrj.io.stream.expr.StreamFactory;
import org.junit.Test;

import static junit.framework.Assert.assertEquals;
import static junit.framework.Assert.assertTrue;

/**
 * Test ConversionEvaluators
 */
public class ConversionEvaluatorsTest {

    StreamFactory factory;
    Map<String, Object> values;

    public ConversionEvaluatorsTest() {
        super();

        factory = new StreamFactory();
        factory.withFunctionName("convert", ConversionEvaluator.class).withFunctionName("raw",
                RawValueEvaluator.class);

        values = new HashedMap();
    }

    @Test
    public void testInvalidExpression() throws Exception {

        StreamEvaluator evaluator;

        try {
            evaluator = factory.constructEvaluator("convert(inches)");
            StreamContext streamContext = new StreamContext();
            evaluator.setStreamContext(streamContext);
            assertTrue(false);
        } catch (IOException e) {
            assertTrue(e.getCause().getCause().getMessage()
                    .contains("Invalid expression convert(inches) - expecting 3 value but found 1"));
        }

        try {
            evaluator = factory.constructEvaluator("convert(inches, yards, 3)");
            StreamContext streamContext = new StreamContext();
            evaluator.setStreamContext(streamContext);
            Tuple tuple = new Tuple(new HashMap());
            evaluator.evaluate(tuple);
            assertTrue(false);
        } catch (IOException e) {
            assertTrue(
                    e.getCause().getCause().getMessage().contains("No conversion available from INCHES to YARDS"));
        }
    }

    @Test
    public void testInches() throws Exception {
        testFunction("convert(inches, centimeters, 2)", (double) (2 * 2.54));
        testFunction("convert(inches, meters, 2)", (double) (2 * 0.0254));
        testFunction("convert(inches, millimeters, 2)", (double) (2 * 25.40));
    }

    @Test
    public void testYards() throws Exception {
        testFunction("convert(yards, meters, 2)", (double) (2 * .91));
        testFunction("convert(yards, kilometers, 2)", (double) (2 * .00091));
    }

    @Test
    public void testMiles() throws Exception {
        testFunction("convert(miles, kilometers, 2)", (double) (2 * 1.61));
    }

    @Test
    public void testMillimeters() throws Exception {
        testFunction("convert(millimeters, inches, 2)", (double) (2 * .039));
    }

    @Test
    public void testCentimeters() throws Exception {
        testFunction("convert(centimeters, inches, 2)", (double) (2 * .39));
    }

    @Test
    public void testMeters() throws Exception {
        testFunction("convert(meters, feet, 2)", (double) (2 * 3.28));
    }

    @Test
    public void testKiloMeters() throws Exception {
        testFunction("convert(kilometers, feet, 2)", (double) (2 * 3280.8));
        testFunction("convert(kilometers, miles, 2)", (double) (2 * .62));
    }

    public void testFunction(String expression, Number expected) throws Exception {
        StreamEvaluator evaluator = factory.constructEvaluator(expression);
        StreamContext streamContext = new StreamContext();
        evaluator.setStreamContext(streamContext);
        Object result = evaluator.evaluate(new Tuple(values));
        assertTrue(result instanceof Number);
        assertEquals(expected, result);
    }

}