def test_compare_priorities(self):
"""
Test that function compare priorities returns 1, -1 and 0 for each respective case
"""
p1 = pm.SystemProcess(1, 'low')
p2 = pm.SystemProcess(2, 'medium')
self.assertEqual(pm.compare_priorities(p1, p2), -1)
self.assertEqual(pm.compare_priorities(p2, p1), 1)
self.assertEqual(pm.compare_priorities(p1, p1), 0)
def test_create_different_priorities(self):
"""
Test that process can be created with priority low, medium and high
"""
lowProcess = pm.SystemProcess(1, 'low')
mediumProcess = pm.SystemProcess(2, 'medium')
highProcess = pm.SystemProcess(3, 'high')
self.assertEqual(lowProcess.priority, 'low')
self.assertEqual(mediumProcess.priority, 'medium')
self.assertEqual(highProcess.priority, 'high')
def test_add_by_capacity(self):
"""
Test that adding by capacity works
"""
pm.add_process_by_capacity(pm.SystemProcess(1, 'low'))
pm.add_process_by_capacity(pm.SystemProcess(2, 'low'))
pm.add_process_by_capacity(pm.SystemProcess(3, 'low'))
response, message = pm.add_process_by_capacity(
pm.SystemProcess(4, 'low'))
self.assertEqual(response, False)
self.assertEqual(message, 'Max capacity exceeded')
def test_add_by_fifo(self):
"""
Test adding by fifo, the oldest process should be removed
"""
pm.add_process_by_fifo(pm.SystemProcess(1, 'low'))
pm.add_process_by_fifo(pm.SystemProcess(2, 'low'))
pm.add_process_by_fifo(pm.SystemProcess(3, 'low'))
response, message = pm.add_process_by_fifo(pm.SystemProcess(4, 'low'))
self.assertEqual(response, True)
self.assertEqual(message, 'Removed process pid 1')
for i in range(3):
self.assertNotEqual(pm.get_process(index=i).pid, 1)
def test_create_process_pid_string(self):
"""
Test that pid passed as string is also recognized
"""
pid = '1'
priority = 'low'
newProcess = pm.SystemProcess(pid, priority)
self.assertIsInstance(newProcess.pid, int)
def test_add_by_priority(self):
"""
Test that adding by priority work
"""
pm.add_process_by_priority(pm.SystemProcess(00, 'medium'))
pm.add_process_by_priority(pm.SystemProcess(10, 'medium'))
pm.add_process_by_priority(pm.SystemProcess(20, 'low'))
response, message = pm.add_process_by_priority(
pm.SystemProcess(30, 'medium'))
self.assertEqual(response, True)
self.assertEqual(message, 'Removed process pid 20')
for i in range(2):
self.assertNotEqual(pm.get_process(index=i).pid, 20)
response, message = pm.add_process_by_priority(
pm.SystemProcess(40, 'low'))
self.assertEqual(response, False)
self.assertEqual(message,
'No lower priority process to be removed was found')
def test_process_list_add__remove(self):
"""
Test that new process can be added and removed from the process list
"""
plist = pm.get_process_list()
plist._add(pm.SystemProcess(1, 'low'))
self.assertEqual(plist._get_capacity(), 1)
plist._remove(0)
self.assertEqual(plist._get_capacity(), 0)
def test_create_process(self):
"""
Test that process object can be created
"""
pid = 1
priority = 'low'
newProcess = pm.SystemProcess(pid, priority)
self.assertEqual(newProcess.priority, priority)
self.assertEqual(newProcess.pid, pid)
self.assertIsInstance(newProcess.createdOn, dt.datetime)
def createProcess(pid, priority):
return p.SystemProcess(pid, priority)