def test__translate__when_zero_vector__then_same_point():
# given
point = Point3D(13.5, 6.5, -4.2)
# when
result = translate(point, Vector3D(0.0, 0.0, 0.0))
# then
assert_that(result).is_equal_to(point)
def test__distance__when_same_point__then_zero():
# given
point = Point3D(13.5, 6.5, -4.2)
# when
result = distance(point, point)
# then
assert_that(result).is_equal_to(0.0)
def test__between__then_vector_from_begin_to_end():
# when
result = Vector3D.between(Point3D(2.4, 7.8, -10.3),
Point3D(-1.5, 13.2, 15.8))
# then
assert_that(result).is_equal_to(Vector3D(-3.9, 5.4, 26.1))
def test__translate__then_point_translated():
# when
result = translate(Point3D(13.7, 6.5, -4.2), Vector3D(-10.4, 3.3, 1.1))
# then
assert_that(result).is_equal_to(Point3D(3.3, 9.8, -3.1))
def test__distance__when_different_points__then_distance():
# when
result = distance(Point3D(4.0, 8.0, 5.0), Point3D(-2.0, -1.0, 3.0))
# then
assert_that(result).is_equal_to(11.0)
def test__sorted_by_z__when_list__then_new_list_sorted_stably_ascending():
# given
sequence = [Point3D(0.0, 0.0, 0.0), Point3D(2.0, 3.0, -5.0), Point3D(-2.0, -3.0, 5.0),
Point3D(2.0, -3.0, -5.0), Point3D(-2.0, -3.0, -5.0), Point3D(3.0, 2.0, 5.0),
Point3D(-3.0, 2.0, 5.0)]
# when
result = sorted_by_z(sequence)
# then
assert_that(result).is_instance_of(list)
assert_that(result).is_equal_to([Point3D(2.0, 3.0, -5.0), Point3D(2.0, -3.0, -5.0),
Point3D(-2.0, -3.0, -5.0), Point3D(0.0, 0.0, 0.0),
Point3D(-2.0, -3.0, 5.0), Point3D(3.0, 2.0, 5.0),
Point3D(-3.0, 2.0, 5.0)])