net.sf.reportengine.core.calc.TestCalculators.java Source code

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Here is the source code for net.sf.reportengine.core.calc.TestCalculators.java

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/**
 * Copyright (C) 2006 Dragos Balan (dragos.balan@gmail.com)
 *
 * Licensed 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 net.sf.reportengine.core.calc;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;

import java.math.BigDecimal;

import org.apache.commons.lang.math.NumberUtils;
import org.junit.Test;

/**
 * @author dragos balan
 *
 */
public class TestCalculators {

    @Test
    public void testCountCalculator() {
        CountGroupCalculator calculator = new CountGroupCalculator();
        assertTrue(calculator.init() instanceof DefaultCalcIntermResult);
        assertTrue(calculator.init().getResult() instanceof Integer);
        assertEquals(calculator.init().getResult(), NumberUtils.INTEGER_ZERO);

        DefaultCalcIntermResult<Integer> testIntermResult = new DefaultCalcIntermResult<Integer>(0);
        DefaultCalcIntermResult<Integer> newResult = calculator.compute(testIntermResult, "first object");

        assertNotNull(newResult);
        assertNotNull(newResult.getResult());
        assertEquals(newResult.getResult(), NumberUtils.INTEGER_ONE);

        testIntermResult = new DefaultCalcIntermResult<Integer>(Integer.valueOf(7));
        newResult = calculator.compute(testIntermResult, "another object here");

        assertNotNull(newResult);
        assertNotNull(newResult.getResult());
        assertEquals(newResult.getResult(), Integer.valueOf(8));

    }

    @Test
    public void testUniversalSumCalculator() {
        SumGroupCalculator calculator = new SumGroupCalculator();
        assertTrue(calculator.init() instanceof DefaultCalcIntermResult);
        assertTrue(calculator.init().getResult() instanceof BigDecimal);
        assertEquals(calculator.init().getResult(), BigDecimal.ZERO);

        DefaultCalcIntermResult<BigDecimal> testIntermResult = new DefaultCalcIntermResult<BigDecimal>(
                BigDecimal.ZERO);
        DefaultCalcIntermResult<BigDecimal> newResult = calculator.compute(testIntermResult, "1");

        assertNotNull(newResult);
        assertNotNull(newResult.getResult());
        assertEquals(newResult.getResult(), new BigDecimal(1));

        testIntermResult = newResult;
        newResult = calculator.compute(testIntermResult, Integer.valueOf(7));

        assertNotNull(newResult);
        assertNotNull(newResult.getResult());
        assertEquals(newResult.getResult(), new BigDecimal(8));

        testIntermResult = new DefaultCalcIntermResult<BigDecimal>(BigDecimal.ZERO);
        newResult = calculator.compute(testIntermResult, new BigDecimal(1.18907));

        assertNotNull(newResult);
        assertNotNull(newResult.getResult());
        assertTrue(newResult.getResult().doubleValue() == 1.18907D);

        testIntermResult = new DefaultCalcIntermResult<BigDecimal>(new BigDecimal(1.18907));
        newResult = calculator.compute(testIntermResult, new Double(2.3));

        assertNotNull(newResult);
        assertNotNull(newResult.getResult());
        assertTrue(newResult.getResult().doubleValue() == 3.48907);
    }

    @Test
    public void testUniversalAvgCalculator() {
        AvgGroupCalculator calculator = new AvgGroupCalculator();
        assertTrue(calculator.init() instanceof AvgCalcIntermResult);
        assertTrue(calculator.init().getResult() instanceof BigDecimal);
        assertEquals(calculator.init().getResult(), BigDecimal.ZERO);
        assertEquals(calculator.init().getCount(), 0);

        AvgCalcIntermResult<BigDecimal> testIntermResult = new AvgCalcIntermResult<BigDecimal>(BigDecimal.ZERO, 0);
        AvgCalcIntermResult<BigDecimal> newResult = calculator.compute(testIntermResult, "1");

        assertNotNull(newResult);
        assertNotNull(newResult.getResult());
        assertEquals(newResult.getResult(), new BigDecimal(1));
        assertEquals(newResult.getCount(), 1);

        testIntermResult = newResult; //ie. result=1, count=1
        newResult = calculator.compute(testIntermResult, Integer.valueOf(7));

        assertNotNull(newResult);
        assertNotNull(newResult.getResult());
        assertEquals(newResult.getResult(), new BigDecimal(4));
        assertEquals(newResult.getCount(), 2);

        //reset
        testIntermResult = new AvgCalcIntermResult<BigDecimal>(BigDecimal.ZERO, 0);
        newResult = calculator.compute(testIntermResult, "1.1890");

        assertNotNull(newResult);
        assertNotNull(newResult.getResult());
        assertTrue(newResult.getResult().doubleValue() == 1.1890);

        testIntermResult = newResult;
        newResult = calculator.compute(testIntermResult, new Double(2.3));

        assertNotNull(newResult);
        assertNotNull(newResult.getResult());
        assertEquals(newResult.getResult().doubleValue(), 1.7445D, 0/*delta*/);
        assertEquals(newResult.getCount(), 2);

        testIntermResult = newResult;
        newResult = calculator.compute(testIntermResult, new Double(2.511));

        assertNotNull(newResult);
        assertNotNull(newResult.getResult());
        assertEquals(newResult.getResult().doubleValue(), 2.0, 0/*delta*/);
    }
}