def calc_field_value(self, field_name, defaults, wcs_info, metadata,
calculations):
"""
Provide the opportunity to calculate (or recalculate) a value for the named field.
This version may call abstract methods which call down to the concrete methods.
"""
if (field_name in ['s_ra', 's_dec']):
occ_utils.calc_wcs_coordinates(wcs_info, metadata, calculations)
elif (field_name in ['im_naxis1', 'im_naxis2']):
if (calculations.get('s_xel1') is not None):
calculations['im_naxis1'] = calculations.get('s_xel1')
if (calculations.get('s_xel2') is not None):
calculations['im_naxis2'] = calculations.get('s_xel2')
elif (field_name == 's_resolution'):
self.calc_spatial_resolution(calculations)
elif (field_name == 'im_pixtype'):
occ_utils.calc_pixtype(metadata, calculations)
elif (field_name in ['access_estsize', 'file_size']):
occ_utils.calc_access_estsize(metadata, calculations)
elif (field_name == 'access_url'):
self.calc_access_url(metadata, calculations)
def test_calc_pixtype_byte(self):
md = { 'headers': { 'BITPIX': 8 }}
calcs = dict()
utils.calc_pixtype(md, calcs)
print(calcs)
assert len(calcs) == 1
assert calcs.get('im_pixtype') == 'byte'
def test_calc_pixtype_badpixval(self):
md = { 'headers': { 'BITPIX': 2 }}
calcs = dict()
utils.calc_pixtype(md, calcs)
print(calcs)
assert len(calcs) == 1
assert calcs.get('im_pixtype') == 'UNKNOWN'
def test_calc_pixtype_nobitpix(self):
md = { 'headers': { 'NAXIS': 2 }}
calcs = dict()
utils.calc_pixtype(md, calcs)
print(calcs)
assert len(calcs) == 0
assert calcs.get('im_pixtype') == None
def test_calc_pixtype_double_str(self):
md = { 'headers': { 'BITPIX': '-64' }}
calcs = dict()
utils.calc_pixtype(md, calcs)
print(calcs)
assert len(calcs) == 1
assert calcs.get('im_pixtype') == 'double'