def test_execute_history(self):
test_pcb = ProcessControlBlock(0, 0, 3, 1)
test_pcb.execute(0, 1)
test_pcb.execute(1, 1)
assert len(test_pcb.get_execution_history()) == 1
test_pcb.execute(3, 1)
assert len(test_pcb.get_execution_history()) == 2
execution_history = test_pcb.get_execution_history()
assert execution_history[0].get_start() == 0
assert execution_history[0].get_length() == 2
assert execution_history[0].get_end() == 2
assert execution_history[1].get_start() == 3
assert execution_history[1].get_length() == 1
assert execution_history[1].get_end() == 4
assert test_pcb.get_remaining_time() == 0
def test_no_history_recording(self):
test_pcb = ProcessControlBlock(0, 0, 1, 1)
test_pcb.execute(0, 1, record=False)
assert len(test_pcb.get_execution_history()) == 0
class TestProcessControlBlock:
@classmethod
def setup_class(self):
self.pcb = ProcessControlBlock(0, 12, 12, 1)
def test_pid(self):
assert self.pcb.get_pid() == 0
def test_arrival_time(self):
assert self.pcb.get_arrival_time() == 12
def test_burst_time(self):
assert self.pcb.get_burst_time() == 12
def test_remaining_time(self):
assert self.pcb.get_remaining_time() == 12
def test_priority(self):
assert self.pcb.get_priority() == 1
def test_execute_func(self):
# Test that we get the correct remaining time after executing
# the process starting at 12 for 6 units.
self.pcb.execute(12, 6)
assert self.pcb.get_remaining_time() == 6
# Test that we do not reduce the remaining time when the start
# time is less than the time when the process was last executed.
with pytest.raises(pcb.ExecutionRecordingException) as ee_info:
self.pcb.execute(11, 6)
with pytest.raises(pcb.ExecutionRecordingException) as ee_info:
self.pcb.execute(12, 6)
with pytest.raises(pcb.ExecutionRecordingException) as ee_info:
self.pcb.execute(13, 5)
assert self.pcb.get_remaining_time() == 6
execution_history_item = self.pcb.get_execution_history()[0]
assert execution_history_item.get_start() == 12
assert execution_history_item.get_length() == 6
assert execution_history_item.get_end() == 18
self.pcb.execute(20, 6)
assert len(self.pcb.get_execution_history()) == 2
with pytest.raises(pcb.ExecutionRecordingException) as ee_info:
self.pcb.execute(11, 6)
def test_execute_history(self):
test_pcb = ProcessControlBlock(0, 0, 3, 1)
test_pcb.execute(0, 1)
test_pcb.execute(1, 1)
assert len(test_pcb.get_execution_history()) == 1
test_pcb.execute(3, 1)
assert len(test_pcb.get_execution_history()) == 2
execution_history = test_pcb.get_execution_history()
assert execution_history[0].get_start() == 0
assert execution_history[0].get_length() == 2
assert execution_history[0].get_end() == 2
assert execution_history[1].get_start() == 3
assert execution_history[1].get_length() == 1
assert execution_history[1].get_end() == 4
assert test_pcb.get_remaining_time() == 0
def test_no_history_recording(self):
test_pcb = ProcessControlBlock(0, 0, 1, 1)
test_pcb.execute(0, 1, record=False)
assert len(test_pcb.get_execution_history()) == 0
def test_pcb_equality(self):
pcb1 = ProcessControlBlock(0, 0, 5, 0)
pcb1a = ProcessControlBlock(0, 0, 5, 0)
pcb2 = ProcessControlBlock(0, 1, 5, 0)
assert pcb1 == pcb1a
assert pcb1 != pcb2