def test_it_returns_the_latest_timestamp_for_two_snapshots(self):
current_epoch = self.converter.date_to_epoch()
formatted_date = EpochDateConverter().epoch_to_date(current_epoch)
snapshot = Snapshot(current_epoch, 1000)
self.history.import_snapshot(snapshot)
snapshot = Snapshot(current_epoch - 1000000, 2000)
self.history.import_snapshot(snapshot)
self.assertEqual(self.history.last_updated(), formatted_date)
def test_it_returns_the_correct_value_when_queried_in_between_two_snapshots(self):
later_timestamp = self.converter.date_to_epoch()
earlier_timestamp = later_timestamp - 120
query_time = (earlier_timestamp + later_timestamp) / 2
self.history.import_snapshot(Snapshot(earlier_timestamp, 300))
self.history.import_snapshot(Snapshot(later_timestamp, 250))
value = self.history.value(query_time)
self.assertEqual(value, 300)
def test_the_order_in_which_snapshots_are_imported_makes_no_difference(self):
timestamp1 = self.converter.date_to_epoch()
timestamp2 = timestamp1 - 1
timestamp3 = timestamp1 - 2
query_time = timestamp1 + 1
self.history.import_snapshot(Snapshot(timestamp2, 20))
self.history.import_snapshot(Snapshot(timestamp1, 10))
self.history.import_snapshot(Snapshot(timestamp3, 30))
value = self.history.value(query_time)
self.assertEqual(value, 10)
def setUp(self):
self.timestamp = EpochDateConverter().date_to_epoch()
self.snapshot = Snapshot(self.timestamp, 10235.63)
def test_it_defaults_to_the_current_epoch_if_no_argument_is_given(self):
timestamp = self.converter.date_to_epoch()
self.history.import_snapshot(Snapshot(timestamp - 5, 10))
self.history.import_snapshot(Snapshot(timestamp - 10, 20))
value = self.history.value()
self.assertEqual(value, 10)
def test_it_updates_the_value_at_the_time_the_snapshot_is_recorded(self):
epoch = EpochDateConverter().date_to_epoch("2014-02-03")
self.history.import_snapshot(Snapshot(epoch, 3060))
value = self.history.value(epoch)
self.assertEqual(value, 3060)
def test_it_returns_the_correct_value_when_queried_after_a_snapshot(self):
timestamp = self.converter.date_to_epoch()
query_time = timestamp + 20
self.history.import_snapshot(Snapshot(timestamp, 100))
value = self.history.value(query_time)
self.assertEqual(value, 100)
def test_it_returns_an_value_of_zero_when_queried_before_a_snapshot(self):
timestamp = self.converter.date_to_epoch()
query_time = timestamp - 20
self.history.import_snapshot(Snapshot(timestamp, 100))
value = self.history.value(query_time)
self.assertEqual(value, 0)
def test_imports_two_snapshots(self):
snapshot1 = Snapshot(self.converter.date_to_epoch(), 1000)
snapshot2 = Snapshot(self.converter.date_to_epoch(), 100)
self.history.import_snapshot(snapshot1)
self.history.import_snapshot(snapshot2)
self.assertEqual(self.history.all(), [snapshot1, snapshot2])
def test_imports_a_snapshot(self):
snapshot = Snapshot(self.converter.date_to_epoch(), 1000)
self.history.import_snapshot(snapshot)
self.assertEqual(self.history.all(), [snapshot])
def import_snapshot(self, time, value):
snapshot = Snapshot(time, value)
return self.__history.import_snapshot(snapshot)