| /* ==================================================================== |
| 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.poi.ss.formula.atp; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| import java.util.Calendar; |
| |
| import org.apache.poi.ss.formula.eval.EvaluationException; |
| import org.apache.poi.ss.usermodel.DateUtil; |
| import org.apache.poi.util.LocaleUtil; |
| import org.junit.Test; |
| |
| /** |
| * Specific test cases for YearFracCalculator |
| */ |
| public final class TestYearFracCalculator { |
| |
| @Test |
| public void testBasis1() { |
| confirm(md(1999, 1, 1), md(1999, 4, 5), 1, 0.257534247); |
| confirm(md(1999, 4, 1), md(1999, 4, 5), 1, 0.010958904); |
| confirm(md(1999, 4, 1), md(1999, 4, 4), 1, 0.008219178); |
| confirm(md(1999, 4, 2), md(1999, 4, 5), 1, 0.008219178); |
| confirm(md(1999, 3, 31), md(1999, 4, 3), 1, 0.008219178); |
| confirm(md(1999, 4, 5), md(1999, 4, 8), 1, 0.008219178); |
| confirm(md(1999, 4, 4), md(1999, 4, 7), 1, 0.008219178); |
| confirm(md(2000, 2, 5), md(2000, 6, 1), 0, 0.322222222); |
| } |
| |
| private void confirm(double startDate, double endDate, int basis, double expectedValue) { |
| double actualValue; |
| try { |
| actualValue = YearFracCalculator.calculate(startDate, endDate, basis); |
| } catch (EvaluationException e) { |
| throw new RuntimeException(e); |
| } |
| double diff = actualValue - expectedValue; |
| if (Math.abs(diff) > 0.000000001) { |
| double hours = diff * 365 * 24; |
| System.out.println(startDate + " " + endDate + " off by " + hours + " hours"); |
| assertEquals(expectedValue, actualValue, 0.000000001); |
| } |
| |
| } |
| |
| private static double md(int year, int month, int day) { |
| Calendar c = LocaleUtil.getLocaleCalendar(year, month-1, day); |
| return DateUtil.getExcelDate(c.getTime()); |
| } |
| } |