def test_starfind_strong_weak(self):
size = (100, 200)
posx = (50, 150)
posy = (40, 60)
sky = 800
rdnoise = 20
flux = (64000, 6000)
theta = 0
fwhm = 3
sigma = fwhm * gaussian_fwhm_to_sigma
threshold = 10
im = gen_image(size,
posx,
posy,
flux,
sky,
rdnoise,
model='gaussian',
sigma=sigma,
theta=theta)
sources = starfind(im, threshold, sky, rdnoise, fwhm)
assert_equal(len(sources), 2)
assert_almost_equal(sources['x'], posx, decimal=1)
assert_almost_equal(sources['y'], posy, decimal=1)
assert_almost_equal(sources.meta['astropop fwhm'],
sigma * 2.355,
decimal=1)
def test_simbad_catalog_filter_id(self):
# performe filter in a different class
query = self.cat.query_region('Sirius', '5m')
id = self.cat.filter_id(query)
id_resolved = self.cat._id_resolve(query['MAIN_ID'])
assert_equal(id, id_resolved)
def test_extract_header_nowcs(self):
header = fits.Header.fromstring(_base_header, sep='\n')
h, wcs = extract_header_wcs(header)
assert_is_none(wcs)
assert_is_instance(h, fits.Header)
assert_equal(h, header)
assert_false(h is header)
def test_guess_coords_skycord_float():
ra = 10.0
dec = 0.0
sk = guess_coordinates(ra, dec, skycoord=True)
assert_is_instance(sk, SkyCoord)
assert_equal(sk.ra.degree, ra)
assert_equal(sk.dec.degree, dec)
def test_fg_getitem_slice(self, tmpdir):
tmpdir, flist = tmpdir
fg = FitsFileGroup(location=tmpdir / 'fits', compression=False)
row = fg[2:5]
assert_is_instance(row, FitsFileGroup)
assert_equal(len(row), 3)
assert_equal(row.files, flist['fits'][2:5])
def test_fg_getitem_empty(self, tmpdir):
tmpdir, flist = tmpdir
fg = FitsFileGroup(location=tmpdir / 'fits', compression=False)
row = fg[[]]
assert_is_instance(row, FitsFileGroup)
assert_equal(len(row), 0)
assert_equal(row.files, [])
def test_1D_simple(self):
arr = np.arange(10)
low, high = (2, 6)
expect = np.array([1, 1, 0, 0, 0, 0, 0, 1, 1, 1], dtype=bool)
mask = _minmax_clip(arr, low, high)
assert_equal(mask, expect)
def test_apply_minmax_clip(self):
_min, _max = (0, 20)
outliers = ((1, 2), (6, 2), (2, 9), (5, 2))
outvalues = [1e6, -2e3, 5e3, -7e2]
expect = np.zeros((10, 10))
with NumpyRNGContext(123):
data = np.ma.MaskedArray(np.random.normal(loc=10,
scale=1,
size=[10, 10]),
mask=np.zeros((10, 10)))
for p, v in zip(outliers, outvalues):
data[p] = v
expect[p] = 1
data[0:2, 0:3].mask = 1
expect[0:2, 0:3] = 1
# force assign the buffer
comb = ImCombiner()
comb._buffer = data
# with these limits, only the outliers must be masked
comb.set_minmax_clip(_min, _max)
comb._apply_rejection()
# original mask must be kept
assert_equal(comb._buffer.mask, expect)
def test_sepfind_multiple_stars(self):
size = (1024, 1024)
number = 15
low = 2000
high = 30000
sky = 800
rdnoise = 20
sigma = 3
theta = 0
x, y, f = gen_position_flux(size, number, low, high, rng_seed=456)
im = gen_image(size,
x,
y,
f,
sky,
rdnoise,
model='gaussian',
sigma=sigma,
theta=theta)
sources = sepfind(im, 5, sky, rdnoise)
x, y, f = self.resort_sources(x, y, f)
assert_equal(len(sources), number)
assert_almost_equal(sources['x'], x, decimal=0)
assert_almost_equal(sources['y'], y, decimal=0)
def test_starfind_recenter_sources(self):
size = (256, 256)
number = 10
sky = 70
rdnoise = 20
low = 120000
high = 320000
sigma = 5
theta = 0
x, y, f = gen_position_flux(size, number, low, high, rng_seed=456)
im = gen_image(size,
x,
y,
f,
sky,
rdnoise,
model='gaussian',
sigma=sigma,
theta=theta)
nx, ny = recenter_sources(
im,
x + np.random.normal(loc=0, scale=1, size=len(x)),
y + np.random.normal(loc=0, scale=1, size=len(x)),
box_size=15,
model='gaussian')
assert_equal(len(nx), number)
assert_equal(len(ny), number)
# TODO: this seems unprecise. Investigate it.
assert_almost_equal(nx, x, decimal=-1)
assert_almost_equal(ny, y, decimal=-1)
def test_starfind_one_star(self):
size = (128, 128)
x, y = (64, 64)
f = 80000
sky = 70
rdnoise = 20
sigma = 5
theta = 0
fwhm = 5 # dummy low value
threshold = 10
im = gen_image(size, [x], [y], [f],
sky,
rdnoise,
model='gaussian',
sigma=sigma,
theta=theta)
sources = starfind(im, threshold, sky, rdnoise, fwhm)
assert_equal(len(sources), 1)
assert_almost_equal(sources['x'], x, decimal=0)
assert_almost_equal(sources['y'], y, decimal=0)
assert_almost_equal(sources.meta['astropop fwhm'],
sigma * 2.355,
decimal=1)
def test_daofind_multiple_stars(self):
size = (512, 512)
number = 15
low = 2000
high = 30000
sky = 800
rdnoise = 20
fwhm = 5
sigma = fwhm * gaussian_fwhm_to_sigma
theta = 0
threshold = 10
x, y, f = gen_position_flux(size, number, low, high, rng_seed=456)
im = gen_image(size,
x,
y,
f,
sky,
rdnoise,
model='gaussian',
sigma=sigma,
theta=theta)
sources = daofind(im, threshold, sky, rdnoise, fwhm)
x, y, f = self.resort_sources(x, y, f)
assert_equal(len(sources), number)
assert_almost_equal(sources['x'], x, decimal=0)
assert_almost_equal(sources['y'], y, decimal=0)
def test_daofind_four_stars_fixed_position(self):
size = (128, 128)
posx = (45, 90, 45, 90)
posy = (45, 50, 90, 100)
sky = 800
rdnoise = 20
flux = (15000, 3000, 5000, 35000)
fwhm = 3
sigma = fwhm * gaussian_fwhm_to_sigma
theta = 0
threshold = 10
im = gen_image(size,
posx,
posy,
flux,
sky,
rdnoise,
model='gaussian',
sigma=sigma,
theta=theta)
sources = daofind(im, threshold, sky, rdnoise, fwhm)
assert_equal(len(sources), 4)
assert_almost_equal(sources['x'], posx, decimal=0)
assert_almost_equal(sources['y'], posy, decimal=0)
def test_daofind_strong_and_weak(self):
size = (128, 128)
posx = (45, 90)
posy = (45, 90)
sky = 800
rdnoise = 20
flux = (32000, 16000)
fwhm = 3
sigma = fwhm * gaussian_fwhm_to_sigma
theta = 0
im = gen_image(size,
posx,
posy,
flux,
sky,
rdnoise,
model='gaussian',
sigma=sigma,
theta=theta)
threshold = 10
sources = daofind(im, threshold, sky, rdnoise, fwhm)
assert_equal(len(sources), 2)
assert_almost_equal(sources['x'], posx, decimal=0)
assert_almost_equal(sources['y'], posy, decimal=0)
def test_invalid(self):
# must mask invalid numbers
arr = np.array([0, 1, 2, np.inf, np.nan, 5, 1])
low, high = (1, 3)
expect = np.array([1, 0, 0, 1, 1, 1, 0])
mask = _minmax_clip(arr, low, high)
assert_equal(mask, expect)
def test_starfind_blind_fwhm(self):
size = (512, 512)
number = 12
low, high = (15000, 60000)
sky = 800
rdnoise = 20
sigma = 2
theta = 0
threshold = 8
x, y, f = gen_position_flux(size, number, low, high, rng_seed=456)
x, y, f = self.resort_sources(x, y, f)
im = gen_image(size,
x,
y,
f,
sky,
rdnoise,
model='gaussian',
sigma=sigma,
theta=theta)
sources = starfind(im, threshold, sky, rdnoise)
assert_equal(len(sources), number)
assert_almost_equal(sources['x'], x, decimal=1)
assert_almost_equal(sources['y'], y, decimal=1)
assert_almost_equal(sources.meta['astropop fwhm'],
sigma * 2.355,
decimal=2)
def test_simbad_catalog_get_simbad_copy(self):
# always return a copy of the querier
s = Simbad()
# assign our simbad
self.cat.simbad = s
assert_is_not(self.cat.simbad, s)
assert_equal(self.cat.simbad.ROW_LIMIT, 0)
def test_framememta_repr(self):
a = FrameMeta({'A': 1, 'B': (2, 'with comment'), 'c': 3})
expect = "FrameMeta:\n"
expect += "a = 1 # \n"
expect += "b = 2 # with comment\n"
expect += "c = 3 # \n"
assert_equal(repr(a), expect)
def test_simple_import(self):
ccd = self.ccd
f = _extract_ccddata(ccd)
assert_equal(f['data'], 100 * np.ones(self.shape))
assert_equal(f['mask'], self.mask)
assert_equal(f['unit'], self.unit)
assert_equal(f['meta'], self.meta)
assert_equal(f['uncertainty'], 10 * np.ones(self.shape))
def test_logger_no_loglist():
mylog = logger.getChild('testing')
msg = 'Some error happend here.'
lh = ListHandler()
assert_is_instance(lh.log_list, list)
mylog.addHandler(lh)
mylog.error(msg)
assert_equal(lh.log_list[0], msg)
def test_process_list_with_args(self):
def dummy_func(i, a, b):
return (i+a)*b
i_array = np.arange(20)
a_val = 2
b_val = 3
res = process_list(dummy_func, i_array, a_val, b=b_val)
assert_equal((i_array+a_val)*b_val, res)
def test_math_int(tmpdir, memmap, value, other):
f = os.path.join(tmpdir, 'int.npy')
arr = np.arange(10, dtype='int8') * value
a = MemMapArray(arr, filename=f, memmap=memmap)
with pytest.raises(TypeError):
int(a)
a = MemMapArray([value], filename=f, memmap=memmap)
assert_equal(int(value), int(a))
def test_mergeheaders_default(self):
# default is 'no_merge'
images = self.create_images()
comb = ImCombiner()
res = comb.combine(images, method='sum')
assert_equal(res.meta, {
'astropop imcombine nimages': 30,
'astropop imcombine method': 'sum'
})
def test_process_list(self):
def dummy_func(i):
i = 1
return i
a = np.zeros(20)
b = np.ones(20)
c = process_list(dummy_func, a)
assert_equal(b, c)
assert_false(np.array_equal(a, c))
def test_solve_astrometry_hdu(tmpdir):
data, index = get_image_index()
hdu = fits.open(data)[0]
header, wcs = _generate_wcs_and_update_header(hdu.header)
hdu.header = header
nwcs = solve_astrometry_hdu(hdu, return_wcs=True)
assert_true(isinstance(nwcs, WCS))
assert_equal(nwcs.naxis, 2)
compare_wcs(wcs, nwcs)
def test_qfloat_unit_property(unit, expect):
# Getter test
c = DummyClass(unit)
assert_equal(c.unit, expect)
# Setter test
c = DummyClass(None)
c.unit = unit
assert_equal(c.unit, expect)
def test_list_custom_extension(self, tmpdir):
tmpdir, flist = tmpdir
found_files = list_fits_files(tmpdir / 'custom',
fits_extensions='.myfits')
assert_equal(sorted(found_files), sorted(flist['myfits']))
found_files = list_fits_files(
tmpdir / 'custom', fits_extensions=['.myfits', '.otherfits'])
assert_equal(sorted(found_files), sorted(flist['custom']))
def test_run_command(self, com):
stdout = []
stderr = []
_, out, err = run_command(com, stdout=stdout, stderr=stderr,
stdout_loglevel='WARN')
assert_is(out, stdout)
assert_is(err, stderr)
assert_equal(stdout, [str(i) for i in range(1, 11)])
assert_equal(stderr, [])
def test_run_command_stderr(self, com):
stdout = []
stderr = []
_, out, err = run_command(com, stdout=stdout, stderr=stderr,
stdout_loglevel='WARN')
assert_is(out, stdout)
assert_is(err, stderr)
assert_equal(stdout, [])
assert_equal(stderr, ['this is an error'])
def test_apply_sigmaclip_only_higher(self):
data = np.ma.MaskedArray([1, -1, 1, -1, -65000], mask=np.zeros(5))
comb = ImCombiner()
# -65000 must not be masked
comb._buffer = data.copy()
comb.set_sigma_clip((None, 1))
expect = [0, 0, 0, 0, 0]
comb._apply_rejection()
assert_equal(comb._buffer.mask, expect)
