def test_coord_to_idx_time_axis(time_intervals):
tmin = time_intervals["t_min"]
tmax = time_intervals["t_max"]
tref = time_intervals["t_ref"]
axis = TimeMapAxis(tmin, tmax, tref, name="time")
time = Time(58927.020833333336, format="mjd")
times = axis.time_mid
times[::2] += 1 * u.h
times = times.insert(0, tref - [1, 2] * u.yr)
idx = axis.coord_to_idx(time)
indices = axis.coord_to_idx(times)
pix = axis.coord_to_pix(time)
pixels = axis.coord_to_pix(times)
assert idx == 0
assert_allclose(indices[1::2], [-1, 1, 3, 5, 7, 9, 11, 13, 15, 17, 19])
assert_allclose(indices[::2], -1)
assert_allclose(pix, 0.5)
assert_allclose(
pixels[1::2],
[-1, 1.5, 3.5, 5.5, 7.5, 9.5, 11.5, 13.5, 15.5, 17.5, 19.5])
def test_single_interval_time_axis(time_interval):
axis = TimeMapAxis(time_interval["t_min"], time_interval["t_max"],
time_interval["t_ref"])
coord = Time(58933, format="mjd") + u.Quantity([1.5, 3.5, 10], unit="d")
pix = axis.coord_to_pix(coord)
assert axis.nbin == 1
assert_allclose(axis.time_delta.to_value("d"), 10)
assert_allclose(axis.time_mid[0].mjd, 58933)
assert_allclose(pix, [0.65, 0.85, -1.0])