Write missing test in test_montecarlo.py

[TanviPooranmal]

I think the following test needs to be written or needs to be assessed to keep or not:

tardis/tardis/montecarlo/tests/test_montecarlo.py

Lines 346 to 361 in df439d8

	def test_compute_distance2boundary(packet_params, expected_params):
	mu = packet_params["mu"]
	r = packet_params["r"]
	r_inner = np.array([6.912e14, 8.64e14], dtype=np.float64)
	r_outer = np.array([8.64e14, 1.0368e15], dtype=np.float64)
	d_boundary = r_packet.calculate_distance_boundary(
	r, mu, r_inner[0], r_outer[0]
	)
	assert_almost_equal(d_boundary[0], expected_params["d_boundary"])
	#
	#
	# TODO: split this into two tests - one to assert errors and other for d_line

[Knights-Templars]

Can you put more details on this issue?