def test_choose_lilly_pad_position_returns_position_which_does_not_overlap_other_pads(self):
# arrange
fp = FrogPond(self.config)
centre_pad = fp._create_centre_lilly_pad()
pad1 = fp._create_lilly_pad()
fp.lilly_pads = [centre_pad, pad1]
pad2_radius = 3
# act
pad2_position = fp._choose_lilly_pad_position(pad2_radius)
# assert
pad2 = Circle(pad2_position, pad2_radius)
assert not pad2.intersects_circle(pad1.circle) \
and not pad2.intersects_circle(centre_pad.circle)
class LillyPad(object):
min_radius = 2
max_radius = 5
def __init__(self, position, radius, centre_pad=False):
self.circle = Circle(position, radius)
self.centre_pad = centre_pad
self.currently_occupied = False
self.visited_frogs = []
def visited_by(self, frog_id):
return frog_id in self.visited_frogs
def within_reach(self, frog_circle):
return self.circle.intersects_circle(frog_circle)
def occupied(self):
return self.currently_occupied
def visit(self, frog_id):
self.visited_frogs.append(frog_id)
self.currently_occupied = True
def leave(self):
self.currently_occupied = False
def test_intersects_circle_returns_false_when_circles_do_not_overlap(self):
# arrange
circle1 = Circle(Point(10, 10), 1)
circle2 = Circle(Point(2, 1), 2)
# act
result = circle1.intersects_circle(circle2)
# assert
assert result is False
def test_intersects_circle_returns_true_when_circles_overlap(self):
# arrange
circle1 = Circle(Point(3, 3), 1)
circle2 = Circle(Point(2, 1), 2)
# act
result = circle1.intersects_circle(circle2)
# assert
assert result is True