def test_select(self):
recorder = SQLiteProcessRecorder(SQLiteDatastore(":memory:"))
recorder.create_table()
# Construct notification log.
notification_log = LocalNotificationLog(recorder, section_size=5)
reader = NotificationLogReader(notification_log, section_size=5)
notifications = list(reader.select(start=1))
self.assertEqual(len(notifications), 0)
# Write 5 events.
originator_id = uuid4()
for i in range(5):
stored_event = StoredEvent(
originator_id=originator_id,
originator_version=i,
topic="topic",
state=b"state",
)
recorder.insert_events(
[stored_event],
)
notifications = list(reader.select(start=1))
self.assertEqual(len(notifications), 5)
# Write 4 events.
originator_id = uuid4()
for i in range(4):
stored_event = StoredEvent(
originator_id=originator_id,
originator_version=i,
topic="topic",
state=b"state",
)
recorder.insert_events([stored_event])
notifications = list(reader.select(start=1))
self.assertEqual(len(notifications), 9)
notifications = list(reader.select(start=2))
self.assertEqual(len(notifications), 8)
notifications = list(reader.select(start=3))
self.assertEqual(len(notifications), 7)
notifications = list(reader.select(start=4))
self.assertEqual(len(notifications), 6)
notifications = list(reader.select(start=8))
self.assertEqual(len(notifications), 2)
notifications = list(reader.select(start=9))
self.assertEqual(len(notifications), 1)
notifications = list(reader.select(start=10))
self.assertEqual(len(notifications), 0)
def test(self):
recorder = SQLiteApplicationRecorder(SQLiteDatastore(":memory:"))
recorder.create_table()
# Construct notification log.
notification_log = LocalNotificationLog(recorder, section_size=5)
# Get the "current" section of log.
section = notification_log["1,10"]
self.assertEqual(len(section.items), 0) # event notifications
self.assertEqual(section.id, None)
self.assertEqual(section.next_id, None)
# Write 5 events.
originator_id = uuid4()
for i in range(5):
stored_event = StoredEvent(
originator_id=originator_id,
originator_version=i,
topic="topic",
state=b"state",
)
recorder.insert_events([stored_event])
# Get the "head" section of log.
section = notification_log["1,10"]
self.assertEqual(len(section.items), 5) # event notifications
self.assertEqual(section.items[0].id, 1)
self.assertEqual(section.items[1].id, 2)
self.assertEqual(section.items[2].id, 3)
self.assertEqual(section.items[3].id, 4)
self.assertEqual(section.items[4].id, 5)
self.assertEqual(section.id, "1,5")
self.assertEqual(section.next_id, "6,10")
# Get the "1,5" section of log.
section = notification_log["1,5"]
self.assertEqual(len(section.items), 5) # event notifications
self.assertEqual(section.items[0].id, 1)
self.assertEqual(section.items[1].id, 2)
self.assertEqual(section.items[2].id, 3)
self.assertEqual(section.items[3].id, 4)
self.assertEqual(section.items[4].id, 5)
self.assertEqual(section.id, "1,5")
self.assertEqual(section.next_id, "6,10")
# Get the next section of log.
section = notification_log["6,10"]
self.assertEqual(len(section.items), 0) # event notifications
self.assertEqual(section.id, None)
self.assertEqual(section.next_id, None)
# Write 4 events.
originator_id = uuid4()
for i in range(4):
stored_event = StoredEvent(
originator_id=originator_id,
originator_version=i,
topic="topic",
state=b"state",
)
recorder.insert_events([stored_event])
# Get the next section of log.
section = notification_log["6,10"]
self.assertEqual(len(section.items), 4) # event notifications
self.assertEqual(section.items[0].id, 6)
self.assertEqual(section.items[1].id, 7)
self.assertEqual(section.items[2].id, 8)
self.assertEqual(section.items[3].id, 9)
self.assertEqual(section.id, "6,9")
self.assertEqual(section.next_id, None)
# Start at non-regular section start.
section = notification_log["3,7"]
self.assertEqual(len(section.items), 5) # event notifications
self.assertEqual(section.items[0].id, 3)
self.assertEqual(section.items[1].id, 4)
self.assertEqual(section.items[2].id, 5)
self.assertEqual(section.items[3].id, 6)
self.assertEqual(section.items[4].id, 7)
self.assertEqual(section.id, "3,7")
self.assertEqual(section.next_id, "8,12")
# Notification log limits section size.
section = notification_log["3,10"]
self.assertEqual(len(section.items), 5) # event notifications
self.assertEqual(section.items[0].id, 3)
self.assertEqual(section.items[1].id, 4)
self.assertEqual(section.items[2].id, 5)
self.assertEqual(section.items[3].id, 6)
self.assertEqual(section.items[4].id, 7)
self.assertEqual(section.id, "3,7")
self.assertEqual(section.next_id, "8,12")
# Reader limits section size.
section = notification_log["3,4"]
self.assertEqual(len(section.items), 2) # event notifications
self.assertEqual(section.items[0].id, 3)
self.assertEqual(section.items[1].id, 4)
self.assertEqual(section.id, "3,4")
self.assertEqual(section.next_id, "5,6")
# Meaningless section ID.
section = notification_log["3,2"]
self.assertEqual(len(section.items), 0) # event notifications
self.assertEqual(section.id, None)
self.assertEqual(section.next_id, None)
def test_select(self):
recorder = SQLiteApplicationRecorder(SQLiteDatastore(":memory:"))
recorder.create_table()
# Construct notification log.
notification_log = LocalNotificationLog(recorder, section_size=10)
# Select start 1, limit 10
notifications = notification_log.select(1, 10)
self.assertEqual(len(notifications), 0)
# Write 5 events.
originator_id = uuid4()
for i in range(5):
stored_event = StoredEvent(
originator_id=originator_id,
originator_version=i,
topic="topic",
state=b"state",
)
recorder.insert_events([stored_event])
# Select start 1, limit 10
notifications = notification_log.select(1, 5)
self.assertEqual(len(notifications), 5)
self.assertEqual(notifications[0].id, 1)
self.assertEqual(notifications[1].id, 2)
self.assertEqual(notifications[2].id, 3)
self.assertEqual(notifications[3].id, 4)
self.assertEqual(notifications[4].id, 5)
# Select start 1, limit 10
notifications = notification_log.select(1, 5)
self.assertEqual(len(notifications), 5)
self.assertEqual(notifications[0].id, 1)
self.assertEqual(notifications[1].id, 2)
self.assertEqual(notifications[2].id, 3)
self.assertEqual(notifications[3].id, 4)
self.assertEqual(notifications[4].id, 5)
# Select start 6, limit 5
notifications = notification_log.select(6, 5)
self.assertEqual(len(notifications), 0)
# Write 4 events.
originator_id = uuid4()
for i in range(4):
stored_event = StoredEvent(
originator_id=originator_id,
originator_version=i,
topic="topic",
state=b"state",
)
recorder.insert_events([stored_event])
# Select start 6, limit 5
notifications = notification_log.select(6, 5)
self.assertEqual(len(notifications), 4) # event notifications
self.assertEqual(notifications[0].id, 6)
self.assertEqual(notifications[1].id, 7)
self.assertEqual(notifications[2].id, 8)
self.assertEqual(notifications[3].id, 9)
# Select start 3, limit 5
notifications = notification_log.select(3, 5)
self.assertEqual(len(notifications), 5) # event notifications
self.assertEqual(notifications[0].id, 3)
self.assertEqual(notifications[1].id, 4)
self.assertEqual(notifications[2].id, 5)
self.assertEqual(notifications[3].id, 6)
self.assertEqual(notifications[4].id, 7)
# Notification log limits limit.
# Select start 1, limit 20
with self.assertRaises(ValueError) as cm:
notification_log.select(1, 20)
self.assertEqual(
cm.exception.args[0], "Requested limit 20 greater than section size 10"
)