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add test case for IRR function 

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1894109 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
PJ Fanning 2021-10-10 13:09:09 +00:00
parent 5bcf3c3d73
commit 8ed95f7970
1 changed files with 24 additions and 0 deletions
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24
poi/src/test/java/org/apache/poi/ss/formula/functions/TestIrr.java
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@ -17,6 +17,8 @@
package org.apache.poi.ss.formula.functions;
import static org.apache.poi.ss.util.Utils.addRow;
import static org.apache.poi.ss.util.Utils.assertDouble;
import static org.junit.jupiter.api.Assertions.assertEquals;
import org.apache.poi.hssf.HSSFTestDataSamples;
@ -29,6 +31,8 @@ import org.apache.poi.ss.usermodel.CellType;
import org.apache.poi.ss.usermodel.CellValue;
import org.junit.jupiter.api.Test;
import java.io.IOException;
/**
* Tests for {@link Irr}
*/
@ -119,6 +123,26 @@ final class TestIrr {
assertEquals(0, failures.length(), "IRR assertions failed");
}
@Test
void testMicrosoftExample() throws IOException {
https://support.microsoft.com/en-us/office/irr-function-64925eaa-9988-495b-b290-3ad0c163c1bc
try (HSSFWorkbook wb = new HSSFWorkbook()) {
HSSFSheet sheet = wb.createSheet();
addRow(sheet, 0, "Data", "Description");
addRow(sheet, 1, -70000, "Initial cost of a business");
addRow(sheet, 2, 12000, "Net income for the first year");
addRow(sheet, 3, 15000, "Net income for the second year");
addRow(sheet, 4, 18000, "Net income for the third year");
addRow(sheet, 5, 21000, "Net income for the fourth year");
addRow(sheet, 6, 26000, "Net income for the fifth year");
HSSFFormulaEvaluator fe = new HSSFFormulaEvaluator(wb);
HSSFCell cell = wb.getSheetAt(0).getRow(0).createCell(100);
assertDouble(fe, cell, "IRR(A2:A6)", -0.02124484827341093);
assertDouble(fe, cell, "IRR(A2:A7)", 0.08663094803653162);
assertDouble(fe, cell, "IRR(A2:A4,-0.1)", -0.44350694133474067);
}
}
private static void assertFormulaResult(CellValue cv, HSSFCell cell){
double actualValue = cv.getNumberValue();
double expectedValue = cell.getNumericCellValue(); // cached formula result calculated by Excel