def setUp(self):
self.pcb1 = PCB(5, 20, 4)
self.pcb2 = PCB(4, 21, 3)
self.a_kernel = Kernel(None)
self.scheduler = Scheduler(None)
self.a_kernel.set_scheduler(self.scheduler)
self.cpu = Cpu(self.a_kernel)
class TestSchedulerInteractions(unittest.TestCase):
'''
Testing Scheduler and CPU interactions...
'''
def setUp(self):
self.pcb1 = PCB(5, 20, 4)
self.pcb2 = PCB(4, 21, 3)
self.a_kernel = Kernel(None)
self.scheduler = Scheduler(None)
self.a_kernel.set_scheduler(self.scheduler)
self.cpu = Cpu(self.a_kernel)
def test_when_given_scheduler_with_priority_and_cpu_then_scheduler_sends_next_process_to_cpu(self):
queue = PriorityQueue()
scheduler_priority = Scheduler(None, ready_queue=queue)
self.a_kernel.set_scheduler(scheduler_priority)
scheduler_priority.set_cpu(self.cpu)
scheduler_priority.set_as_priority()
self.pcb1.set_priority(1)
scheduler_priority.push_to_queue(self.pcb1)
self.pcb2.set_priority(2)
scheduler_priority.push_to_queue(self.pcb2)
expected_pcb = scheduler_priority.next_process()
scheduler_priority.send_next_to_cpu()
self.assertEqual(self.pcb2, self.cpu.get_actual_pcb())
def test_when_given_scheduler_with_round_robin_and_a_cpu_then_scheduler_sends_next_process_to_cpu(self):
self.scheduler.set_cpu(self.cpu)
quantum = 1
self.scheduler.set_as_round_robin(quantum)
self.scheduler.push_to_queue(self.pcb1)
self.scheduler.send_next_to_cpu()
self.assertEqual(self.pcb1, self.cpu.get_actual_pcb())
def test_when_given_scheduler_with_fifo_and_a_cpu_then_scheduler_sends_next_process_to_cpu(self):
self.scheduler.set_cpu(self.cpu)
self.scheduler.set_as_fifo()
self.scheduler.push_to_queue(self.pcb1)
self.scheduler.send_next_to_cpu()
self.assertEqual(self.pcb1, self.cpu.get_actual_pcb())