class FrameManagerTest(unittest.TestCase):
# Arrange
def setUp(self):
program = Program('Excel')
pageHolder = PageHolder(program)
self.frame1 = Frame(0, 9, -1)
self.frame2 = Frame(1, 9, -1)
self.frame3 = Frame(2, 9, -1)
self.frame4 = Frame(3, 9, -1)
self.frames = [self.frame1, self.frame2, self.frame3, self.frame4]
self.hdd = HDD(50)
self.frame_manager = FrameManager(self.frames, self.hdd)
self.page_creator = PageCreator()
self.pcb = PCB(0, 30, pageHolder)
self.page_creator.create(self.pcb, 5)
def test_whenIAssignAPCBTheFirstTime_ThenFrameManagerUsesTheFirstFrame(self):
# Pages
first_frame = self.frame_manager.get_frames()[0]
self.frame_manager.map_page_to_frame(self.pcb)
first_pcb_page = self.pcb.get_page_assigned_by_number(0)
self.assertEquals(first_frame.get_page(), first_pcb_page)
def test_whenTheFirstPCBPageIsUsedAndPCBIsAssigned_ThenFrameManagerUsesTheSecondFrame(self):
# Pages
first_pcb_page = self.pcb.get_page_assigned_by_number(0)
second_pcb_page =self.pcb.get_page_assigned_by_number(1)
self.frame_manager.map_page_to_frame(self.pcb)
first_pcb_page.set_used()
self.frame_manager.map_page_to_frame(self.pcb)
second_frame = self.frame_manager.get_frames()[1]
self.assertEquals(second_frame.get_page(), second_pcb_page)
def test_whenAllFramesAreUsedAndPCBAssignsOneMorePage_ThenTheYoungestFrameGetsEmpty(self):
# Pages
first_pcb_page = self.pcb.get_page_assigned_by_number(0)
second_pcb_page = self.pcb.get_page_assigned_by_number(1)
assert (second_pcb_page != None)
third_pcb_page = self.pcb.get_page_assigned_by_number(2)
forth_pcb_page = self.pcb.get_page_assigned_by_number(3)
fifth_pcb_page = self.pcb.get_page_assigned_by_number(4)
self.frame_manager.map_page_to_frame(self.pcb)
first_pcb_page.set_used()
self.frame_manager.map_page_to_frame(self.pcb)
second_pcb_page.set_used()
self.frame_manager.map_page_to_frame(self.pcb)
third_pcb_page.set_used()
self.frame_manager.map_page_to_frame(self.pcb)
forth_pcb_page.set_used()
forth_frame = self.frame_manager.get_frames()[3]
self.frame_manager.map_page_to_frame(self.pcb)
self.assertEqual(forth_frame.get_page(), fifth_pcb_page)
class PageCreatorTest(unittest.TestCase):
# Arrange
def setUp(self):
self.page_creator = PageCreator()
self.program = Program("Duke Nukem",20)
id = 0
cantidadDeInstrucciones = 20
self.pcb = PCB(id, cantidadDeInstrucciones,PageHolder(self.program))
def test_whenICreatePagesForPCB_ThenTheInfoHolderHasThemAsItShould(self):
self.page_creator.create(self.pcb, 5)
self.assertEqual(len(self.pcb.get_memory_policy_for_pcb().get_pages()), 4)
def test_whenICreatePagesForPCB_ThenTheInfoTheyHaveIsCorrect(self):
self.page_creator.create(self.pcb, 5)
page1 = self.pcb.get_page_assigned_by_number(0)
page2 = self.pcb.get_page_assigned_by_number(1)
page3 = self.pcb.get_page_assigned_by_number(2)
page4 = self.pcb.get_page_assigned_by_number(3)
self.assertEqual(page1.get_starting_index(), 0)
self.assertEqual(page1.get_ending_index(), 4)
self.assertEqual(page1.get_amount_of_instructions(), 5)
self.assertEqual(page2.get_starting_index(), 5)
self.assertEqual(page2.get_ending_index(), 9)
self.assertEqual(page2.get_amount_of_instructions(), 5)
self.assertEqual(page3.get_starting_index(), 10)
self.assertEqual(page3.get_ending_index(), 14)
self.assertEqual(page3.get_amount_of_instructions(), 5)
self.assertEqual(page4.get_starting_index(), 15)
self.assertEqual(page4.get_ending_index(), 19)
self.assertEqual(page4.get_amount_of_instructions(), 5)
