trunk/src/testcases/org/apache/poi/ss/formula/atp/TestWorkdayFunction.java

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   this work for additional information regarding copyright ownership.
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package org.apache.poi.ss.formula.atp;


import static org.apache.poi.ss.formula.eval.ErrorEval.VALUE_INVALID;
import static org.junit.Assert.assertEquals;

import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

import org.apache.poi.ss.formula.OperationEvaluationContext;
import org.apache.poi.ss.formula.TwoDEval;
import org.apache.poi.ss.formula.eval.AreaEval;
import org.apache.poi.ss.formula.eval.AreaEvalBase;
import org.apache.poi.ss.formula.eval.NumberEval;
import org.apache.poi.ss.formula.eval.StringEval;
import org.apache.poi.ss.formula.eval.ValueEval;
import org.apache.poi.ss.usermodel.DateUtil;
import org.apache.poi.util.LocaleUtil;
import org.junit.Test;

public class TestWorkdayFunction {

    private static final String STARTING_DATE      = "2008/10/01";
    private static final String FIRST_HOLIDAY      = "2008/11/26";
    private static final String SECOND_HOLIDAY     = "2008/12/04";
    private static final String THIRD_HOLIDAY      = "2009/01/21";
    private static final String RETROATIVE_HOLIDAY = "2008/09/29";

    private static final OperationEvaluationContext EC = new OperationEvaluationContext(null, null, 1, 1, 1, null);

    @Test
    public void testFailWhenNoArguments() {
        ValueEval ve[] = new ValueEval[0];
        assertEquals(VALUE_INVALID, WorkdayFunction.instance.evaluate(ve, null));
    }

    @Test
    public void testFailWhenLessThan2Arguments() {
        ValueEval ve[] = new ValueEval[1];
        assertEquals(VALUE_INVALID, WorkdayFunction.instance.evaluate(ve, null));
    }

    @Test
    public void testFailWhenMoreThan3Arguments() {
        ValueEval ve[] = new ValueEval[4];
        assertEquals(VALUE_INVALID, WorkdayFunction.instance.evaluate(ve, null));
    }

    @Test
    public void testFailWhenArgumentsAreNotDatesNorNumbers() {
        ValueEval ve[] = { new StringEval("Potato"), new StringEval("Cucumber") };
        assertEquals(VALUE_INVALID, WorkdayFunction.instance.evaluate(ve, EC));
    }

    @Test
    public void testReturnWorkdays() {
        Calendar expCal = LocaleUtil.getLocaleCalendar(2009, 3, 30);
        Date expDate = expCal.getTime();
        ValueEval ve[] = { new StringEval(STARTING_DATE), new NumberEval(151) };
        Date actDate = DateUtil.getJavaDate(((NumberEval) WorkdayFunction.instance.evaluate(ve, EC)).getNumberValue());
        assertEquals(expDate, actDate);
    }

    @Test
    public void testReturnWorkdaysSpanningAWeekendSubtractingDays() {
        Calendar expCal = LocaleUtil.getLocaleCalendar(2013, 8, 27);
        Date expDate = expCal.getTime();

    	ValueEval ve[] = { new StringEval("2013/09/30"), new NumberEval(-1) };
		double numberValue = ((NumberEval) WorkdayFunction.instance.evaluate(ve, EC)).getNumberValue();
		assertEquals(41544.0, numberValue, 0);
		
		Date actDate = DateUtil.getJavaDate(numberValue);
        assertEquals(expDate, actDate);
    }

    @Test
    public void testReturnWorkdaysSpanningAWeekendAddingDays() {
        Calendar expCal = LocaleUtil.getLocaleCalendar(2013, 8, 30);
        Date expDate = expCal.getTime();
        
        ValueEval ve[] = { new StringEval("2013/09/27"), new NumberEval(1) };
        double numberValue = ((NumberEval) WorkdayFunction.instance.evaluate(ve, EC)).getNumberValue();
        assertEquals(41547.0, numberValue, 0);

        Date actDate = DateUtil.getJavaDate(numberValue);
        assertEquals(expDate, actDate);
    }

    @Test
    public void testReturnWorkdaysWhenStartIsWeekendAddingDays() {
        Calendar expCal = LocaleUtil.getLocaleCalendar(2013, 9, 7);
        Date expDate = expCal.getTime();
        
        ValueEval ve[] = { new StringEval("2013/10/06"), new NumberEval(1) };
        double numberValue = ((NumberEval) WorkdayFunction.instance.evaluate(ve, EC)).getNumberValue();
        assertEquals(41554.0, numberValue, 0);

        Date actDate = DateUtil.getJavaDate(numberValue);
        assertEquals(expDate, actDate);
    }

    @Test
    public void testReturnWorkdaysWhenStartIsWeekendSubtractingDays() {
        Calendar expCal = LocaleUtil.getLocaleCalendar(2013, 9, 4);
        Date expDate = expCal.getTime();
        
        ValueEval ve[] = { new StringEval("2013/10/06"), new NumberEval(-1) };
        double numberValue = ((NumberEval) WorkdayFunction.instance.evaluate(ve, EC)).getNumberValue();
        assertEquals(41551.0, numberValue, 0);

        Date actDate = DateUtil.getJavaDate(numberValue);
        assertEquals(expDate, actDate);
    }

    @Test
    public void testReturnWorkdaysWithDaysTruncated() {
        Calendar expCal = LocaleUtil.getLocaleCalendar(2009, 3, 30);
        Date expDate = expCal.getTime();
        
        ValueEval ve[] = { new StringEval(STARTING_DATE), new NumberEval(151.99999) };
        double numberValue = ((NumberEval) WorkdayFunction.instance.evaluate(ve, EC)).getNumberValue();
        
        Date actDate = DateUtil.getJavaDate(numberValue);
        assertEquals(expDate, actDate);
    }

    @Test
    public void testReturnRetroativeWorkday() {
        Calendar expCal = LocaleUtil.getLocaleCalendar(2008, 8, 23);
        Date expDate = expCal.getTime();
        
        ValueEval ve[] = { new StringEval(STARTING_DATE), new NumberEval(-5), new StringEval(RETROATIVE_HOLIDAY) };
        double numberValue = ((NumberEval) WorkdayFunction.instance.evaluate(ve, EC)).getNumberValue();
        
        Date actDate = DateUtil.getJavaDate(numberValue);
        assertEquals(expDate, actDate);
    }

    @Test
    public void testReturnNetworkdaysWithManyHolidays() {
        Calendar expCal = LocaleUtil.getLocaleCalendar(2009, 4, 5);
        Date expDate = expCal.getTime();
        
        ValueEval ve[] = {
            new StringEval(STARTING_DATE), new NumberEval(151),
            new MockAreaEval(FIRST_HOLIDAY, SECOND_HOLIDAY, THIRD_HOLIDAY) };
        double numberValue = ((NumberEval) WorkdayFunction.instance.evaluate(ve, EC)).getNumberValue();
        
        Date actDate = DateUtil.getJavaDate(numberValue);
        assertEquals(expDate, actDate);
    }

    private class MockAreaEval extends AreaEvalBase {

        private List<ValueEval> holidays;

        public MockAreaEval(String... holidays) {
            this(0, 0, 0, holidays.length - 1);
            this.holidays = new ArrayList<ValueEval>();
            for (String holiday : holidays) {
                this.holidays.add(new StringEval(holiday));
            }
        }

        protected MockAreaEval(int firstRow, int firstColumn, int lastRow, int lastColumn) {
            super(firstRow, firstColumn, lastRow, lastColumn);
        }

        @Override
        public ValueEval getRelativeValue(int sheetIndex, int relativeRowIndex, int relativeColumnIndex) {
            return this.holidays.get(relativeColumnIndex);
        }
        @Override
        public ValueEval getRelativeValue(int relativeRowIndex, int relativeColumnIndex) {
            return getRelativeValue(-1, relativeRowIndex, relativeColumnIndex);
        }

        @Override
        public AreaEval offset(int relFirstRowIx, int relLastRowIx, int relFirstColIx, int relLastColIx) {
            return null;
        }

        @Override
        public TwoDEval getColumn(int columnIndex) {
            return null;
        }

        @Override
        public TwoDEval getRow(int rowIndex) {
            return null;
        }

    }
}