public function testDaysOfTheWeek()
 {
     $this->assertInstanceOf($this->schedulerClass, $this->scheduler->daysOfTheWeek(Day::SUNDAY));
     $this->assertEquals($this->scheduler->getSchedule(), Scheduler::ANY . ' ' . Scheduler::NONE . ' ' . Scheduler::ANY . ' ' . Day::SUNDAY . ' ' . Scheduler::ANY . ' ' . Scheduler::ANY);
     $array = [Day::FRIDAY, Day::THURSDAY, Day::TUESDAY];
     $this->scheduler->daysOfTheWeek($array);
     $this->assertEquals(implode(',', $array), $this->scheduler->getScheduleDayOfWeek());
 }