def test_can_compute_points_with_datetimes(self):
two_days_ago = now() - timedelta(days=2)
one_day_ago = now() - timedelta(days=1)
today = now()
line = Line.from_two_points(Point(two_days_ago, 1), Point(one_day_ago, 2))
expected = Point(today, 3)
actual = line.point_from_x(today)
self.assert_equals(expected.x, actual.x)
self.assert_almost_equals(expected.y, actual.y, max_delta=0.1)
def test_can_compute_points_with_datetimes(self):
two_days_ago = now() - timedelta(days=2)
one_day_ago = now() - timedelta(days=1)
today = now()
line = Line.from_two_points(Point(two_days_ago, 1),
Point(one_day_ago, 2))
expected = Point(today, 3)
actual = line.point_from_x(today)
self.assert_equals(expected.x, actual.x)
self.assert_almost_equals(expected.y, actual.y, max_delta=0.1)
def calculate(self, actual_burndown, a_datetime):
if len(actual_burndown) <= 1:
return []
reference_burndown = self.find_reference_burndown(actual_burndown)
current_burndown = actual_burndown[-1]
reference_point = Point(reference_burndown.when, reference_burndown.remaining_time)
current_point = Point(current_burndown.when, current_burndown.remaining_time)
trend_line = Line.from_two_points(reference_point, current_point)
final_value = trend_line.y_from_x(a_datetime)
return [current_burndown, burndown_entry(a_datetime, final_value)]
def calculate(self, actual_burndown, a_datetime):
if len(actual_burndown) <= 1:
return []
reference_burndown = self.find_reference_burndown(actual_burndown)
current_burndown = actual_burndown[-1]
reference_point = Point(reference_burndown.when,
reference_burndown.remaining_time)
current_point = Point(current_burndown.when,
current_burndown.remaining_time)
trend_line = Line.from_two_points(reference_point, current_point)
final_value = trend_line.y_from_x(a_datetime)
return [current_burndown, burndown_entry(a_datetime, final_value)]
def test_can_compute_ys_when_points_have_datetimes_as_x(self):
two_days_ago = now() - timedelta(days=2)
one_day_ago = now() - timedelta(days=1)
line = Line.from_two_points(Point(two_days_ago, 1),
Point(one_day_ago, 2))
self.assert_almost_equals(3, line.y_from_x(now()), max_delta=0.1)
def test_can_instantiate_line_with_two_points(self):
first = Point(1, 1)
second = Point(21, 11)
actual = Line.from_two_points(first, second)
self.assert_equals(first, actual.point)
self.assert_almost_equals(0.5, actual.slope, max_delta=0.001)
def test_can_compute_ys_when_points_have_datetimes_as_x(self):
two_days_ago = now() - timedelta(days=2)
one_day_ago = now() - timedelta(days=1)
line = Line.from_two_points(Point(two_days_ago, 1), Point(one_day_ago, 2))
self.assert_almost_equals(3, line.y_from_x(now()), max_delta=0.1)
def test_can_instantiate_line_with_two_points(self):
first = Point(1, 1)
second = Point(21, 11)
actual = Line.from_two_points(first, second)
self.assert_equals(first, actual.point)
self.assert_almost_equals(0.5, actual.slope, max_delta=0.001)
