PhpSpreadsheet/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/EoMonthTest.php

<?php

namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\DateTime;

use PhpOffice\PhpSpreadsheet\Calculation\DateTimeExcel\EoMonth;

class EoMonthTest extends AllSetupTeardown
{
    /**
     * @dataProvider providerEOMONTH
     *
     * @param mixed $expectedResult
     */
    public function testEOMONTH($expectedResult, string $formula): void
    {
        $this->mightHaveException($expectedResult);
        $sheet = $this->sheet;
        $sheet->getCell('A1')->setValue("=EOMONTH($formula)");
        $sheet->getCell('B1')->setValue('1954-11-23');
        self::assertEquals($expectedResult, $sheet->getCell('A1')->getCalculatedValue());
    }

    public function providerEOMONTH(): array
    {
        return require 'tests/data/Calculation/DateTime/EOMONTH.php';
    }

    public function testEOMONTHtoUnixTimestamp(): void
    {
        self::setUnixReturn();

        $result = EoMonth::evaluate('2012-1-26', -1);
        self::assertEquals(1325289600, $result);
    }

    public function testEOMONTHtoDateTimeObject(): void
    {
        self::setObjectReturn();

        $result = EoMonth::evaluate('2012-1-26', -1);
        //    Must return an object...
        self::assertIsObject($result);
        //    ... of the correct type
        self::assertTrue(is_a($result, 'DateTimeInterface'));
        //    ... with the correct value
        self::assertSame($result->format('d-M-Y'), '31-Dec-2011');
    }
}