class TestDistanceFunctions(unittest.TestCase):
    def setUp(self):
        speedLimits = SpeedLimits([
            SpeedLimit(range=((25, 0), (30, 0)), limit=1, ticks=0),
            SpeedLimit.createObstacle((80, 2))
        ], 5)
        self.road = Road(3, 100, speedLimits)
        self.freeCar = Car(self.road, (50, 0))
        self.carFacingObstacle = Car(self.road, (79, 2))
        self.car1 = Car(self.road, (75, 2))
        self.road.placeObjects(
            [self.freeCar, self.carFacingObstacle, self.car1])

    def test_findPrevCar(self):
        length = self.road.getLength()
        for x in range(length):
            self.assertEqual(None, self.road.findPrevCar((x, 1)))
        for x in ((80, length)):
            self.assertEqual(None, self.road.findPrevCar((x, 2)))
        for x in range(50, length):
            self.assertEqual(self.freeCar, self.road.findPrevCar((x, 0)))
        self.assertEqual(self.car1, self.road.findPrevCar((78, 2)))

    def test_distanceToNextThing(self):
        for y in range(self.road.getLanesCount()):
            self.assertTrue(
                self.road.distanceToNextThing((99,
                                               y)) >= self.road.getLength())

        self.assertEqual(
            0, self.road.distanceToNextThing(self.carFacingObstacle.pos))
        self.assertEqual(3, self.road.distanceToNextThing(self.car1.pos))
        self.assertEqual(49, self.road.distanceToNextThing((0, 0)))
class TestDistanceFunctions(unittest.TestCase):
    def setUp(self):
        speedLimits = SpeedLimits( [ SpeedLimit(range=((25, 0), (30, 0)), limit=1, ticks=0), SpeedLimit.createObstacle((80, 2)) ] , 5)
        self.road = Road(3, 100, speedLimits)
        self.freeCar = Car(self.road, (50, 0))
        self.carFacingObstacle = Car(self.road, (79, 2))
        self.car1 = Car(self.road, (75, 2))
        self.road.placeObjects([self.freeCar, self.carFacingObstacle, self.car1])

    def test_findPrevCar(self):
        length = self.road.getLength()
        for x in range(length):
            self.assertEqual(None, self.road.findPrevCar( (x, 1) ))
        for x in ((80, length)):
            self.assertEqual(None, self.road.findPrevCar( (x, 2) ))
        for x in range(50, length):
            self.assertEqual(self.freeCar, self.road.findPrevCar( (x, 0) ))
        self.assertEqual(self.car1, self.road.findPrevCar( (78, 2) ))

    def test_distanceToNextThing(self):
        for y in range(self.road.getLanesCount()):
            self.assertTrue( self.road.distanceToNextThing( (99, y)) >= self.road.getLength())

        self.assertEqual(0, self.road.distanceToNextThing( self.carFacingObstacle.pos ))
        self.assertEqual(3, self.road.distanceToNextThing( self.car1.pos ))
        self.assertEqual(49, self.road.distanceToNextThing( (0, 0) ) )