def test_rover_does_not_mmove_if_fuel_gauage_is_empty(self):
rover = Rover(0, 0)
rover.fuel_gauge = 0
rover.move()
self.assertEqual(rover.position, [0, 0])
def test_rover_reports_fuel_gauge_is_empty(self):
rover = Rover(0, 0)
rover.fuel_gauge = 0
rover.move()
self.assertFalse(rover.fuel_exists)
def test_rover_lowers_fuel_gauge_to_0(self):
rover = Rover(0, 0)
rover.fuel_gauge = 1
rover.move()
self.assertEqual(rover.fuel_gauge, 0)
def test_rover_fuel_gauge_cannot_go_lower_than_0(self):
rover = Rover(0, 0)
rover.fuel_gauge = 0
rover.move()
self.assertEqual(rover.fuel_gauge, 0)
def test_rover_cant_reach_home_without_sufficient_fuel_when_turning_twice(
self):
rover = Rover(0, 0)
rover.fuel_gauge = 3
rover.direction_index = 3 # west
self.assertFalse(rover.can_reach_home(1, 1))
def test_rover_can_reach_home_with_fuel_when_turning_twice(self):
rover = Rover(0, 0)
rover.fuel_gauge = 4
rover.direction_index = 3 # west
self.assertTrue(rover.can_reach_home(1, 1))
def test_rover_can_reach_home_with_fuel_when_turning_once(self):
rover = Rover(0, 0)
rover.fuel_gauge = 3
rover.direction_index = 0 # north
self.assertTrue(rover.can_reach_home(1, 1))
def test_rover_cant_reach_home_without_fuel(self):
rover = Rover(0, 0)
rover.fuel_gauge = 0
self.assertFalse(rover.can_reach_home(10, 10))
def test_rover_does_not_report_fuel_gauge_is_empty_if_it_has_fuel(self):
rover = Rover(0, 0)
rover.fuel_gauge = 1
rover.move()
self.assertFalse(rover.fuel_exists)
