<?php class Sabre_CardDAV_VersionTest extends PHPUnit_Framework_TestCase { function testString() { $v = Sabre_CardDAV_Version::VERSION; $this->assertEquals(-1, version_compare('0.1',$v)); $s = Sabre_CardDAV_Version::STABILITY; $this->assertTrue($s == 'alpha' || $s == 'beta' || $s =='stable'); } }