Coverage for tests/test_stamps.py : 26%

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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 testIOsub(self):
95 """Test the class' write and readFits when passing on a bounding box.
96 """
97 bbox = geom.Box2I(geom.Point2I(3, 9), geom.Extent2I(11, 7))
98 ss = make_stamps()
99 with tempfile.NamedTemporaryFile() as f:
100 ss.writeFits(f.name)
101 options = {'bbox': bbox}
102 subStamps = stamps.Stamps.readFitsWithOptions(f.name, options)
103 for s1, s2 in zip(ss, subStamps):
104 self.assertEqual(bbox.getDimensions(), s2.stamp_im.getDimensions())
105 self.assertMaskedImagesAlmostEqual(s1.stamp_im[bbox], s2.stamp_im)
107 def roundtrip(self, ss):
108 """Round trip a Stamps object to disk and check values
109 """
110 with tempfile.NamedTemporaryFile() as f:
111 ss.writeFits(f.name)
112 options = PropertyList()
113 ss2 = stamps.Stamps.readFitsWithOptions(f.name, options)
114 self.assertEqual(len(ss), len(ss2))
115 for s1, s2 in zip(ss, ss2):
116 self.assertMaskedImagesAlmostEqual(s1.stamp_im, s2.stamp_im)
117 self.assertAlmostEqual(s1.position.getRa().asDegrees(),
118 s2.position.getRa().asDegrees())
119 self.assertAlmostEqual(s1.position.getDec().asDegrees(),
120 s2.position.getDec().asDegrees())
123class MemoryTester(lsst.utils.tests.MemoryTestCase):
124 pass
127def setup_module(module):
128 lsst.utils.tests.init()
131if __name__ == "__main__": 131 ↛ 132line 131 didn't jump to line 132, because the condition on line 131 was never true
132 lsst.utils.tests.init()
133 unittest.main()