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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/>. 

21 

22import unittest 

23import numpy as np 

24import tempfile 

25 

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 

31 

32np.random.seed(90210) 

33 

34 

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 

56 

57 return stamps.Stamps(stamp_list, metadata=metadata) 

58 

59 

60class StampsBaseTestCase(lsst.utils.tests.TestCase): 

61 """Test StampsBase. 

62 """ 

63 def testReadFitsWithOptionsNotImplementedErrorRaised(self): 

64 """ 

65 Test that subclasses have their own version 

66 of this implemented or an error is raised. 

67 """ 

68 class FakeStampsBase(stamps.StampsBase): 

69 def __init__(self): 

70 return 

71 

72 with self.assertRaises(NotImplementedError): 

73 FakeStampsBase.readFitsWithOptions('noFile', {}) 

74 

75 def testReadFitsWithOptionsMetadataError(self): 

76 """Test that error is raised when STAMPCLS returns None 

77 """ 

78 with tempfile.NamedTemporaryFile() as f: 

79 ss = make_stamps() 

80 emptyMetadata = PropertyList() 

81 stamps.writeFits( 

82 f.name, [ss[0].stamp_im], emptyMetadata, None, True, True 

83 ) 

84 with self.assertRaises(RuntimeError): 

85 stamps.StampsBase.readFits(f.name) 

86 

87 def testReadFitsReturnsNewClass(self): 

88 """Test that readFits will return subclass 

89 """ 

90 class FakeStampsBase(stamps.StampsBase): 

91 def __init__(self): 

92 self._metadata = {} 

93 return 

94 

95 @classmethod 

96 def readFitsWithOptions(cls, filename, options): 

97 return cls() 

98 

99 def _refresh_metadata(self): 

100 self._metadata = {} 

101 

102 fakeStamps = FakeStampsBase.readFitsWithOptions('noFile', {}) 

103 self.assertEqual(type(fakeStamps), FakeStampsBase) 

104 

105 

106class StampsTestCase(lsst.utils.tests.TestCase): 

107 """Test Stamps. 

108 """ 

109 def testAppend(self): 

110 """Test ability to append to a Stamps object 

111 """ 

112 ss = make_stamps() 

113 s = ss[-1] 

114 ss.append(s) 

115 self.roundtrip(ss) 

116 # check if appending something other than a Stamp raises 

117 with self.assertRaises(ValueError): 

118 ss.append('hello world') 

119 

120 def testExtend(self): 

121 ss = make_stamps() 

122 ss2 = make_stamps() 

123 ss.extend([s for s in ss2]) 

124 # check if extending with something other than a Stamps 

125 # object raises 

126 with self.assertRaises(ValueError): 

127 ss.extend(['hello', 'world']) 

128 

129 def testIO(self): 

130 """Test the class' write and readFits methods. 

131 """ 

132 self.roundtrip(make_stamps()) 

133 

134 def testIOone(self): 

135 """Test the class' write and readFits methods for the special case of 

136 one stamp. 

137 """ 

138 self.roundtrip(make_stamps(1)) 

139 

140 def testIOsub(self): 

141 """Test the class' write and readFits when passing on a bounding box. 

142 """ 

143 bbox = geom.Box2I(geom.Point2I(3, 9), geom.Extent2I(11, 7)) 

144 ss = make_stamps() 

145 with tempfile.NamedTemporaryFile() as f: 

146 ss.writeFits(f.name) 

147 options = {'bbox': bbox} 

148 subStamps = stamps.Stamps.readFitsWithOptions(f.name, options) 

149 for s1, s2 in zip(ss, subStamps): 

150 self.assertEqual(bbox.getDimensions(), s2.stamp_im.getDimensions()) 

151 self.assertMaskedImagesAlmostEqual(s1.stamp_im[bbox], s2.stamp_im) 

152 

153 def roundtrip(self, ss): 

154 """Round trip a Stamps object to disk and check values 

155 """ 

156 with tempfile.NamedTemporaryFile() as f: 

157 ss.writeFits(f.name) 

158 options = PropertyList() 

159 ss2 = stamps.Stamps.readFitsWithOptions(f.name, options) 

160 self.assertEqual(len(ss), len(ss2)) 

161 for s1, s2 in zip(ss, ss2): 

162 self.assertMaskedImagesAlmostEqual(s1.stamp_im, s2.stamp_im) 

163 self.assertAlmostEqual(s1.position.getRa().asDegrees(), 

164 s2.position.getRa().asDegrees()) 

165 self.assertAlmostEqual(s1.position.getDec().asDegrees(), 

166 s2.position.getDec().asDegrees()) 

167 

168 

169class MemoryTester(lsst.utils.tests.MemoryTestCase): 

170 pass 

171 

172 

173def setup_module(module): 

174 lsst.utils.tests.init() 

175 

176 

177if __name__ == "__main__": 177 ↛ 178line 177 didn't jump to line 178, because the condition on line 177 was never true

178 lsst.utils.tests.init() 

179 unittest.main()