<?php namespace PhpOffice\PhpSpreadsheetTests\Shared; use PhpOffice\PhpSpreadsheet\Shared\TimeZone; use PHPUnit\Framework\TestCase; class TimeZoneTest extends TestCase { public function testSetTimezone() { $timezoneValues = [ 'Europe/Prague', 'Asia/Tokyo', 'America/Indiana/Indianapolis', 'Pacific/Honolulu', 'Atlantic/St_Helena', ]; foreach ($timezoneValues as $timezoneValue) { $result = TimeZone::setTimezone($timezoneValue); self::assertTrue($result); } } public function testSetTimezoneWithInvalidValue() { $unsupportedTimezone = 'Etc/GMT+10'; $result = TimeZone::setTimezone($unsupportedTimezone); self::assertFalse($result); } }