def test_jones():
"""
Test when data file has more than one element in Jones matrix.
Currently we do not have a testfile, so we will artifically create one
and check for internal consistency.
"""
cal_in = UVCal()
cal_out = UVCal()
testfile = os.path.join(DATA_PATH, 'zen.2457698.40355.xx.fitsA')
write_file = os.path.join(DATA_PATH, 'test/outtest_jones.fits')
message = testfile + ' appears to be an old calfits format which'
uvtest.checkWarnings(cal_in.read_calfits, [testfile], message=message)
# Create filler jones info
cal_in.jones_array = np.array([-5, -6, -7, -8])
cal_in.Njones = 4
cal_in.flag_array = np.zeros(cal_in._flag_array.expected_shape(cal_in),
dtype=bool)
cal_in.gain_array = np.ones(cal_in._gain_array.expected_shape(cal_in),
dtype=np.complex64)
cal_in.quality_array = np.zeros(
cal_in._quality_array.expected_shape(cal_in))
cal_in.write_calfits(write_file, clobber=True)
cal_out.read_calfits(write_file)
nt.assert_equal(cal_in, cal_out)
# Repeat for delay version
testfile = os.path.join(DATA_PATH, 'zen.2457698.40355.xx.HH.uvc.fits')
message = [
testfile + ' appears to be an old calfits format which',
testfile + ' appears to be an old calfits format for delay files'
]
uvtest.checkWarnings(cal_in.read_calfits, [testfile],
message=message,
nwarnings=2)
# Create filler jones info
cal_in.jones_array = np.array([-5, -6, -7, -8])
cal_in.Njones = 4
cal_in.flag_array = np.zeros(cal_in._flag_array.expected_shape(cal_in),
dtype=bool)
cal_in.delay_array = np.ones(cal_in._delay_array.expected_shape(cal_in),
dtype=np.float64)
cal_in.quality_array = np.zeros(
cal_in._quality_array.expected_shape(cal_in))
cal_in.write_calfits(write_file, clobber=True)
cal_out.read_calfits(write_file)
nt.assert_equal(cal_in, cal_out)
del (cal_in)
del (cal_out)
def test_errors():
"""
Test for various errors.
"""
cal_in = UVCal()
cal_out = UVCal()
testfile = os.path.join(DATA_PATH, 'zen.2457698.40355.xx.HH.uvc.fits')
write_file = os.path.join(DATA_PATH, 'test/outtest_firstcal.fits')
message = [testfile + ' appears to be an old calfits format which',
testfile + ' appears to be an old calfits format for delay files']
uvtest.checkWarnings(cal_in.read_calfits, [testfile], message=message,
nwarnings=2)
cal_in.set_unknown_cal_type()
nt.assert_raises(ValueError, cal_in.write_calfits, write_file, run_check=False, clobber=True)
# change values for various axes in flag and total quality hdus to not match primary hdu
uvtest.checkWarnings(cal_in.read_calfits, [testfile], message=message,
nwarnings=2)
# Create filler jones info
cal_in.jones_array = np.array([-5, -6, -7, -8])
cal_in.Njones = 4
cal_in.flag_array = np.zeros(cal_in._flag_array.expected_shape(cal_in), dtype=bool)
cal_in.delay_array = np.ones(cal_in._delay_array.expected_shape(cal_in), dtype=np.float64)
cal_in.quality_array = np.zeros(cal_in._quality_array.expected_shape(cal_in))
# add total_quality_array so that can be tested as well
cal_in.total_quality_array = np.zeros(cal_in._total_quality_array.expected_shape(cal_in))
header_vals_to_double = [{'flag': 'CDELT2'}, {'flag': 'CDELT3'},
{'flag': 'CRVAL5'}, {'totqual': 'CDELT1'},
{'totqual': 'CDELT2'}, {'totqual': 'CRVAL4'}]
for i, hdr_dict in enumerate(header_vals_to_double):
cal_in.write_calfits(write_file, clobber=True)
unit = list(hdr_dict.keys())[0]
keyword = hdr_dict[unit]
F = fits.open(write_file)
data = F[0].data
primary_hdr = F[0].header
hdunames = uvutils._fits_indexhdus(F)
ant_hdu = F[hdunames['ANTENNAS']]
flag_hdu = F[hdunames['FLAGS']]
flag_hdr = flag_hdu.header
totqualhdu = F[hdunames['TOTQLTY']]
totqualhdr = totqualhdu.header
if unit == 'flag':
flag_hdr[keyword] *= 2
elif unit == 'totqual':
totqualhdr[keyword] *= 2
prihdu = fits.PrimaryHDU(data=data, header=primary_hdr)
hdulist = fits.HDUList([prihdu, ant_hdu])
flag_hdu = fits.ImageHDU(data=flag_hdu.data, header=flag_hdr)
hdulist.append(flag_hdu)
totqualhdu = fits.ImageHDU(data=totqualhdu.data, header=totqualhdr)
hdulist.append(totqualhdu)
if float(astropy.__version__[0:3]) < 1.3:
hdulist.writeto(write_file, clobber=True)
else:
hdulist.writeto(write_file, overwrite=True)
nt.assert_raises(ValueError, cal_out.read_calfits, write_file, strict_fits=True)
# repeat for gain type file
testfile = os.path.join(DATA_PATH, 'zen.2457698.40355.xx.fitsA')
write_file = os.path.join(DATA_PATH, 'test/outtest_omnical.fits')
message = testfile + ' appears to be an old calfits format which'
uvtest.checkWarnings(cal_in.read_calfits, [testfile], message=message)
# Create filler jones info
cal_in.jones_array = np.array([-5, -6, -7, -8])
cal_in.Njones = 4
cal_in.flag_array = np.zeros(cal_in._flag_array.expected_shape(cal_in), dtype=bool)
cal_in.gain_array = np.ones(cal_in._gain_array.expected_shape(cal_in), dtype=np.complex64)
cal_in.quality_array = np.zeros(cal_in._quality_array.expected_shape(cal_in))
# add total_quality_array so that can be tested as well
cal_in.total_quality_array = np.zeros(cal_in._total_quality_array.expected_shape(cal_in))
header_vals_to_double = [{'totqual': 'CDELT1'}, {'totqual': 'CDELT2'},
{'totqual': 'CDELT3'}, {'totqual': 'CRVAL4'}]
for i, hdr_dict in enumerate(header_vals_to_double):
cal_in.write_calfits(write_file, clobber=True)
unit = list(hdr_dict.keys())[0]
keyword = hdr_dict[unit]
F = fits.open(write_file)
data = F[0].data
primary_hdr = F[0].header
hdunames = uvutils._fits_indexhdus(F)
ant_hdu = F[hdunames['ANTENNAS']]
totqualhdu = F[hdunames['TOTQLTY']]
totqualhdr = totqualhdu.header
if unit == 'totqual':
totqualhdr[keyword] *= 2
prihdu = fits.PrimaryHDU(data=data, header=primary_hdr)
hdulist = fits.HDUList([prihdu, ant_hdu])
totqualhdu = fits.ImageHDU(data=totqualhdu.data, header=totqualhdr)
hdulist.append(totqualhdu)
if float(astropy.__version__[0:3]) < 1.3:
hdulist.writeto(write_file, clobber=True)
else:
hdulist.writeto(write_file, overwrite=True)
nt.assert_raises(ValueError, cal_out.read_calfits, write_file, strict_fits=True)