public function testToDateTime()
 {
     CopixI18N::setLang('fr');
     $this->assertEquals('25/12/1976', CopixDateTime::timestampToDate(220316400));
     $this->assertEquals('25/12/1976', CopixDateTime::yyyymmddToDate('19761225'));
     $this->assertEquals('25/12/1976 15:00:00', CopixDateTime::yyyymmddhhiissToDateTime('19761225150000'));
     CopixI18N::setLang('en');
     $this->assertEquals('12/25/1976', CopixDateTime::YYYYMMDDToDate('19761225'));
     $this->assertNull(null);
     $this->assertFalse(CopixDateTime::YYYYMMDDToDate('1123761225'));
     $this->assertEquals('12/25/1976', CopixDateTime::timestampToDate(220316400));
     $this->assertEquals('12/25/1976 15:00:00', CopixDateTime::yyyymmddhhiissToDateTime('19761225150000'));
     $this->assertEquals('12/25/1976 10:00:00', CopixDateTime::yyyymmddhhiissToDateTime('19761225100000'));
 }