function test_day_getDateStart3() { // create the period $period = new Piwik_Period_Day(Piwik_Date::factory("2007-12-31")); // start date $startDate = $period->getDateStart(); // expected string $this->assertEqual($startDate->toString(), "2007-12-31"); // check that for a day, getDateStart = getStartEnd $this->assertEqual($startDate, $period->getDateEnd()); }