def test_wl_to_index(ws, result):
"wavelength to index"
# header
h_dict = {"CRVAL1": 3500, 'CDELT1': 2}
h = Header()
for k, v in h_dict.items():
h.set(k, v)
out = ft.wavelength_to_index(h, ws)
assert out == result
def test_post_sanitize_header():
test_subject = FITSHelper(io.BytesIO(), io.BytesIO())
data = np.arange(10000).reshape(100, 100)
header = Header()
wcs = WCS(fix=False)
header.set('REMAIN1', 'VALUE1')
header.set('DQ1', 'dqvalue1')
header.set('NAXIS', 2)
header.set('NAXIS1', 88)
header.set('NAXIS2', 212)
result = CutoutResult(data, wcs=wcs)
test_subject._post_sanitize_header(header, result)
assert 'VALUE1' == header.get('REMAIN1'), 'REMAIN1 should still be there.'
def test_cd_pc_header_fix():
test_subject = FITSHelper(io.BytesIO(), io.BytesIO())
data = np.arange(10000).reshape(100, 100)
header = Header()
wcs = WCS()
header.set('NAXIS', 2)
header.set('NAXIS1', 88)
header.set('NAXIS2', 212)
header.set('CD1_1', 44)
header.set('CD1_2', 88)
header.set('CD2_1', 22)
header.set('CD2_2', 33)
result = CutoutResult(data, wcs=wcs)
test_subject._post_sanitize_header(header, result)
assert not header.get('CD1_2'), 'CD1_2 should be renamed.'
assert not header.get('CD1_1'), 'CD1_1 should be renamed.'
assert 44 == header.get('PC1_1'), 'PC1_1 should be 44.'
assert 33 == header.get('PC2_2'), 'PC2_2 should be 33.'
def test_pc_leading_zeroes_header_fix():
test_subject = FITSHelper(io.BytesIO(), io.BytesIO())
data = np.arange(10000).reshape(100, 100)
header = Header()
wcs = WCS()
header.set('NAXIS', 2)
header.set('NAXIS1', 88)
header.set('NAXIS2', 212)
header.set('PC01_01', 44)
header.set('PC01_02', 88)
header.set('PC02_01', 22)
header.set('PC02_02', 33)
result = CutoutResult(data, wcs=wcs)
test_subject._post_sanitize_header(header, result)
assert not header.get('PC01_02'), 'PC01_02 should be renamed.'
assert not header.get('PC01_01'), 'PC01_01 should be renamed.'
assert 22 == header.get('PC2_1'), 'PC2_1 should be 22.'
assert 88 == header.get('PC1_2'), 'PC1_2 should be 88.'
def test_with_wcs():
data = np.arange(100).reshape(10, 10)
header = Header()
wcs = WCS(fix=False)
wcs.wcs.cd = [[0.9, 0.8], [0.7, 0.6]]
header.set('REMAIN1', 'VALUE1')
header.set('DQ1', 'dqvalue1')
header.set('NAXIS', 2)
test_subject = CutoutND(data, wcs=wcs)
cutout_result = test_subject.extract([(1, 6, 2), (4, 10, 2)])
result_wcs = cutout_result.wcs
np.testing.assert_array_equal([[1.8, 1.6], [1.4, 1.2]], result_wcs.wcs.cd,
'Wrong CD output.')
def test_post_sanitize_header_pc():
test_subject = FITSHelper(io.BytesIO(), io.BytesIO())
data = np.arange(10000).reshape(100, 100)
header = Header()
wcs = WCS(fix=False)
wcs.wcs.pc = [[0.9, 0.8], [0.7, 0.6]]
header.set('REMAIN1', 'VALUE1')
header.set('DQ1', 'dqvalue1')
header.set('NAXIS', 2)
header.set('NAXIS1', 88)
header.set('NAXIS2', 212)
header.set('CRPIX1', 77.0)
header.set('WCSAXES', 2)
header.set('CTYPE1', 'ctype1value')
assert header.get('PC1_1') is None, 'Should not contain PC1_1'
assert header.get('PC2_1') is None, 'Should not contain PC2_1'
assert header.get('PC1_2') is None, 'Should not contain PC1_2'
assert header.get('PC2_2') is None, 'Should not contain PC2_2'
result = CutoutResult(data, wcs=wcs)
assert header.index('WCSAXES') > header.index('CRPIX1'), \
'Start with bad indexes...'
test_subject._post_sanitize_header(header, result)
assert header.get('PC1_1') == 0.9, 'Wrong PC1_1 value.'
assert header.get('PC2_1') == 0.7, 'Wrong PC2_1 value.'
assert header.get('PC1_2') == 0.8, 'Wrong PC1_2 value.'
assert header.get('PC2_2') == 0.6, 'Wrong PC2_2 value.'
assert 'VALUE1' == header.get('REMAIN1'), 'REMAIN1 should still be there.'
def test_post_sanitize_header_crpix():
test_subject = FITSHelper(io.BytesIO(), io.BytesIO())
data = np.arange(10000).reshape(100, 100)
header = Header()
wcs = WCS(fix=False)
header.set('REMAIN1', 'VALUE1')
header.set('DQ1', 'dqvalue1')
header.set('NAXIS', 2)
header.set('NAXIS1', 88)
header.set('NAXIS2', 212)
header.set('CRPIX1', 77.0)
header.set('WCSAXES', 2)
header.set('CTYPE1', 'ctype1value')
result = CutoutResult(data, wcs=wcs)
assert header.index('WCSAXES') > header.index('CRPIX1'), \
'Start with bad indexes...'
test_subject._post_sanitize_header(header, result)
assert 'VALUE1' == header.get('REMAIN1'), 'REMAIN1 should still be there.'
def fits_header(self) -> Header:
hdr = Header()
hdr.set("INSTRUME", self.camera)
hdr.set("EXPTIME", self.exp)
hdr.set("GAIN", self.gain)
hdr.set("CCD-TEMP", self.temp)
if self.image_type == "LIGHT":
hdr.set("IMAGETYP", "Light Frame")
hdr.set("OBJECT", self.target)
hdr.set("FILTER", self.filter)
elif self.image_type == "FLAT":
hdr.set("IMAGETYP", "Flat Frame")
hdr.set("FILTER", self.filter)
elif self.image_type == "DARK":
hdr.set("IMAGETYP", "Dark Frame")
hdr.set("SUBCOUNT", self.subcount)
return hdr
