poi/src/test/java/org/apache/poi/ss/formula/functions/TestFloorPrecise.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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package org.apache.poi.ss.formula.functions;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFFormulaEvaluator;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.FormulaError;
import org.junit.jupiter.api.Test;

import java.io.IOException;

import static org.apache.poi.ss.util.Utils.assertDouble;
import static org.apache.poi.ss.util.Utils.assertError;

/**
 * Tests for {@link FloorPrecise}
 */
final class TestFloorPrecise {

    //https://support.microsoft.com/en-us/office/floor-precise-function-f769b468-1452-4617-8dc3-02f842a0702e
    @Test
    void testMicrosoftExamples() throws IOException {
        try (HSSFWorkbook wb = new HSSFWorkbook()) {
            HSSFSheet sheet = wb.createSheet();
            HSSFRow row = sheet.createRow(0);
            HSSFCell cell = row.createCell(0);
            HSSFFormulaEvaluator fe = new HSSFFormulaEvaluator(wb);
            assertDouble(fe, cell, "FLOOR.PRECISE(-3.2,-1)", -4, 0.00000000000001);
            assertDouble(fe, cell, "FLOOR.PRECISE(3.2,1)", 3, 0.00000000000001);
            assertDouble(fe, cell, "FLOOR.PRECISE(-3.2,1)", -4, 0.00000000000001);
            assertDouble(fe, cell, "FLOOR.PRECISE(3.2,-1)", 3, 0.00000000000001);
            assertDouble(fe, cell, "FLOOR.PRECISE(3.2)", 3, 0.00000000000001);
        }
    }

    @Test
    void testInvalid() throws IOException {
        try (HSSFWorkbook wb = new HSSFWorkbook()) {
            HSSFSheet sheet = wb.createSheet();
            HSSFRow row = sheet.createRow(0);
            HSSFCell cell = row.createCell(0);
            HSSFFormulaEvaluator fe = new HSSFFormulaEvaluator(wb);
            assertError(fe, cell, "FLOOR.PRECISE()", FormulaError.VALUE);
        }
    }

    @Test
    void testNumError() throws IOException {
        try (HSSFWorkbook wb = new HSSFWorkbook()) {
            HSSFSheet sheet = wb.createSheet();
            HSSFRow row = sheet.createRow(0);
            HSSFCell cell = row.createCell(0);
            HSSFFormulaEvaluator fe = new HSSFFormulaEvaluator(wb);
            assertError(fe, cell, "FLOOR.PRECISE(\"abc\")", FormulaError.VALUE);
        }
    }
}