trunk/src/testcases/org/apache/poi/ss/formula/functions/TestSumproduct.java

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   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
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       http://www.apache.org/licenses/LICENSE-2.0

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   distributed under the License is distributed on an "AS IS" BASIS,
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   See the License for the specific language governing permissions and
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package org.apache.poi.ss.formula.functions;

import junit.framework.TestCase;

import org.apache.poi.ss.formula.eval.AreaEval;
import org.apache.poi.ss.formula.eval.ErrorEval;
import org.apache.poi.ss.formula.eval.NumberEval;
import org.apache.poi.ss.formula.eval.NumericValueEval;
import org.apache.poi.ss.formula.eval.RefEval;
import org.apache.poi.ss.formula.eval.ValueEval;

/**
 * Test cases for SUMPRODUCT()
 *
 * @author Josh Micich
 */
public final class TestSumproduct extends TestCase {

	private static ValueEval invokeSumproduct(ValueEval[] args) {
		// srcCellRow and srcCellColumn are ignored by SUMPRODUCT
		return new Sumproduct().evaluate(args, -1, (short)-1);
	}
	private static void confirmDouble(double expected, ValueEval actualEval) {
		if(!(actualEval instanceof NumericValueEval)) {
			fail("Expected numeric result");
		}
		NumericValueEval nve = (NumericValueEval)actualEval;
		assertEquals(expected, nve.getNumberValue(), 0);
	}

	public void testScalarSimple() {

		RefEval refEval = EvalFactory.createRefEval("A1", new NumberEval(3));
		ValueEval[] args = {
			refEval,
			new NumberEval(2),
		};
		ValueEval result = invokeSumproduct(args);
		confirmDouble(6D, result);
	}

	public void testAreaSimple() {
		ValueEval[] aValues = {
			new NumberEval(2),
			new NumberEval(4),
			new NumberEval(5),
		};
		ValueEval[] bValues = {
			new NumberEval(3),
			new NumberEval(6),
			new NumberEval(7),
		};
		AreaEval aeA = EvalFactory.createAreaEval("A1:A3", aValues);
		AreaEval aeB = EvalFactory.createAreaEval("B1:B3", bValues);

		ValueEval[] args = { aeA, aeB, };
		ValueEval result = invokeSumproduct(args);
		confirmDouble(65D, result);
	}

	/**
	 * For scalar products, the terms may be 1x1 area refs
	 */
	public void testOneByOneArea() {

		AreaEval ae = EvalFactory.createAreaEval("A1:A1", new ValueEval[] { new NumberEval(7), });

		ValueEval[] args = {
				ae,
				new NumberEval(2),
			};
		ValueEval result = invokeSumproduct(args);
		confirmDouble(14D, result);
	}

	public void testMismatchAreaDimensions() {

		AreaEval aeA = EvalFactory.createAreaEval("A1:A3", new ValueEval[3]);
		AreaEval aeB = EvalFactory.createAreaEval("B1:D1", new ValueEval[3]);

		ValueEval[] args;
		args = new ValueEval[] { aeA, aeB, };
		assertEquals(ErrorEval.VALUE_INVALID, invokeSumproduct(args));

		args = new ValueEval[] { aeA, new NumberEval(5), };
		assertEquals(ErrorEval.VALUE_INVALID, invokeSumproduct(args));
	}

	public void testAreaWithErrorCell() {
		ValueEval[] aValues = {
			ErrorEval.REF_INVALID,
			null,
		};
		AreaEval aeA = EvalFactory.createAreaEval("A1:A2", aValues);
		AreaEval aeB = EvalFactory.createAreaEval("B1:B2", new ValueEval[2]);

		ValueEval[] args = { aeA, aeB, };
		assertEquals(ErrorEval.REF_INVALID, invokeSumproduct(args));
	}
}