Coverage for tests/test_stamps.py : 29%

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1# This file is part of meas_algorithms.
2#
3# Developed for the LSST Data Management System.
4# This product includes software developed by the LSST Project
5# (https://www.lsst.org).
6# See the COPYRIGHT file at the top-level directory of this distribution
7# for details of code ownership.
8#
9# This program is free software: you can redistribute it and/or modify
10# it under the terms of the GNU General Public License as published by
11# the Free Software Foundation, either version 3 of the License, or
12# (at your option) any later version.
13#
14# This program is distributed in the hope that it will be useful,
15# but WITHOUT ANY WARRANTY; without even the implied warranty of
16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17# GNU General Public License for more details.
18#
19# You should have received a copy of the GNU General Public License
20# along with this program. If not, see <https://www.gnu.org/licenses/>.
22import unittest
23import numpy as np
24import tempfile
26from lsst.meas.algorithms import stamps
27from lsst.afw import image as afwImage
28from lsst.daf.base import PropertyList
29import lsst.geom as geom
30import lsst.utils.tests
32np.random.seed(90210)
35def make_stamps(n_stamps=3):
36 stampSize = 25
37 # create dummy stamp stamps
38 stampImages = [afwImage.maskedImage.MaskedImageF(stampSize, stampSize)
39 for _ in range(n_stamps)]
40 for stampIm in stampImages:
41 stampImArray = stampIm.image.array
42 stampImArray += np.random.rand(stampSize, stampSize)
43 stampMaskArray = stampIm.mask.array
44 stampMaskArray += 10
45 stampVarArray = stampIm.variance.array
46 stampVarArray += 1000.
47 ras = np.random.rand(n_stamps)*360.
48 decs = np.random.rand(n_stamps)*180 - 90
49 stamp_list = [stamps.Stamp(stamp_im=stampIm,
50 position=geom.SpherePoint(geom.Angle(ra, geom.degrees),
51 geom.Angle(dec, geom.degrees)))
52 for stampIm, ra, dec in zip(stampImages, ras, decs)]
53 metadata = PropertyList()
54 metadata['RA_DEG'] = ras
55 metadata['DEC_DEG'] = decs
57 return stamps.Stamps(stamp_list, metadata=metadata)
60class StampsTestCase(lsst.utils.tests.TestCase):
61 """Test Stamps.
62 """
63 def testAppend(self):
64 """Test ability to append to a Stamps object
65 """
66 ss = make_stamps()
67 s = ss[-1]
68 ss.append(s)
69 self.roundtrip(ss)
70 # check if appending something other than a Stamp raises
71 with self.assertRaises(ValueError):
72 ss.append('hello world')
74 def testExtend(self):
75 ss = make_stamps()
76 ss2 = make_stamps()
77 ss.extend([s for s in ss2])
78 # check if extending with something other than a Stamps
79 # object raises
80 with self.assertRaises(ValueError):
81 ss.extend(['hello', 'world'])
83 def testIO(self):
84 """Test the class' write and readFits methods.
85 """
86 self.roundtrip(make_stamps())
88 def testIOone(self):
89 """Test the class' write and readFits methods for the special case of
90 one stamp.
91 """
92 self.roundtrip(make_stamps(1))
94 def roundtrip(self, ss):
95 """Round trip a Stamps object to disk and check values
96 """
97 with tempfile.NamedTemporaryFile() as f:
98 ss.writeFits(f.name)
99 options = PropertyList()
100 ss2 = stamps.Stamps.readFitsWithOptions(f.name, options)
101 self.assertEqual(len(ss), len(ss2))
102 for s1, s2 in zip(ss, ss2):
103 self.assertMaskedImagesAlmostEqual(s1.stamp_im, s2.stamp_im)
104 self.assertAlmostEqual(s1.position.getRa().asDegrees(),
105 s2.position.getRa().asDegrees())
106 self.assertAlmostEqual(s1.position.getDec().asDegrees(),
107 s2.position.getDec().asDegrees())
110class MemoryTester(lsst.utils.tests.MemoryTestCase):
111 pass
114def setup_module(module):
115 lsst.utils.tests.init()
118if __name__ == "__main__": 118 ↛ 119line 118 didn't jump to line 119, because the condition on line 118 was never true
119 lsst.utils.tests.init()
120 unittest.main()