def test_mtc_one_pixel_apart_for_diagonal_traces(self, diagonal_trace):
pixel_size = 0.015
spt = SpectralTrace(diagonal_trace)
disp, wave = spt.get_max_dispersion()
wave_edges = spt.get_pixel_wavelength_edges(pixel_size) # wavelength edges
dist_between_mtc = np.average(disp) * np.average(np.diff(wave_edges))
assert dist_between_mtc == approx(pixel_size, rel=1e-5)
def test_monochromatic_trace_curves_are_one_pixel_apart(self, basic_trace):
pixel_size = 0.015
spt = SpectralTrace(basic_trace)
disp, wave = spt.get_max_dispersion()
wbedges = spt.get_pixel_wavelength_edges(pixel_size) # wavelength edges
dist_between_mtc = np.average(disp) * np.average(np.diff(wbedges))
assert dist_between_mtc == approx(pixel_size, rel=1e-5)