wiki.techinc.nl/tests/phpunit/includes/TimeAdjustTest.php

<?php

class TimeAdjustTest extends MediaWikiLangTestCase {
	protected function setUp() {
		parent::setUp();

		$this->iniSet( 'precision', 15 );
	}

	/**
	 * Test offset usage for a given Language::userAdjust
	 * @dataProvider dataUserAdjust
	 * @covers Language::userAdjust
	 */
	public function testUserAdjust( $date, $localTZoffset, $expected ) {
		global $wgContLang;

		$this->setMwGlobals( 'wgLocalTZoffset', $localTZoffset );

		$this->assertEquals(
			strval( $expected ),
			strval( $wgContLang->userAdjust( $date, '' ) ),
			"User adjust {$date} by {$localTZoffset} minutes should give {$expected}"
		);
	}

	public static function dataUserAdjust() {
		return array(
			array( 20061231235959, 0, 20061231235959 ),
			array( 20061231235959, 5, 20070101000459 ),
			array( 20061231235959, 15, 20070101001459 ),
			array( 20061231235959, 60, 20070101005959 ),
			array( 20061231235959, 90, 20070101012959 ),
			array( 20061231235959, 120, 20070101015959 ),
			array( 20061231235959, 540, 20070101085959 ),
			array( 20061231235959, -5, 20061231235459 ),
			array( 20061231235959, -30, 20061231232959 ),
			array( 20061231235959, -60, 20061231225959 ),
		);
	}
}