def test_vector_sub_should_return_diff_between_two_vectors(self):
vector_one = Vector(x=5, y=10)
vector_two = Vector(x=1, y=7)
diff_one_to_two = vector_one - vector_two
self.assertEqual(diff_one_to_two.x, 4)
self.assertEqual(diff_one_to_two.y, 3)
def test_vector_distance_to_should_return_distance_between_two_vectors(
self):
vector_one = Vector(x=5, y=10)
vector_two = Vector(x=1, y=7)
dist_one_to_two = vector_one.distance_to(vector_two)
dist_two_to_one = vector_two.distance_to(vector_one)
self.assertEqual(dist_one_to_two, 5)
self.assertEqual(dist_two_to_one, 5)
self.assertNotEqual(dist_one_to_two, 25)
self.assertNotEqual(dist_two_to_one, 25)
self.assertEqual(dist_one_to_two, dist_two_to_one)
def next_coord_vector(self):
return Vector(x=self.coords[self.coords_index][0],
y=self.coords[self.coords_index][1])
def target_vector(self):
return Vector(sprite=self.target)
def test_vector_constructor_should_receive_coords(self):
x, y = 0, 0
vector = Vector(x=x, y=y)
self.assertEqual(vector.x, x)
self.assertEqual(vector.y, y)
def test_normalize_should_return_division_between_coords_and_magnitude(
self):
vector = Vector(x=6, y=8)
result = vector.normalize()
self.assertEqual(result.x, 0.6)
self.assertEqual(result.y, 0.8)
def test_vector_magnitude_should_return_norma_of_vector(self):
vector = Vector(x=4, y=3)
magnitude = vector.magnitude()
self.assertEqual(magnitude, 5)
def test_vector_construct_should_return_error_if_empty(self):
self.assertRaises(Exception, lambda: Vector())
def test_vector_constructor_should_receive_sprite_instance(self):
skull = Skull('./game/assets/skull.png', pos_xy=(0, 0), coords=[])
vector = Vector(sprite=skull)
self.assertEqual(vector.x, skull.rect.centerx)
self.assertEqual(vector.y, skull.rect.centery)