Coverage for tests/test_exposureFromImage.py: 29%

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1# This file is part of obs_base. 

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 

23 

24import lsst.utils.tests 

25from lsst.daf.base import PropertyList 

26from lsst.obs.base import exposureFromImage 

27import lsst.afw.image as afwImage 

28 

29 

30class ExposureFromImageTestCase(lsst.utils.tests.TestCase): 

31 """A test case for exposureFromImage.""" 

32 

33 def setUp(self): 

34 self.maskedImage = makeRampMaskedImage(10, 11) 

35 

36 def tearDown(self): 

37 del self.maskedImage 

38 

39 def testDecoratedImage(self): 

40 image = self.maskedImage.getImage() 

41 decoImage = afwImage.DecoratedImageF(image) 

42 metadata = PropertyList() 

43 metadata.set("FOO", "BAR") 

44 decoImage.setMetadata(metadata) 

45 exposure = exposureFromImage(decoImage) 

46 self.assertImagesEqual(exposure.getMaskedImage().getImage(), image) 

47 md = exposure.getMetadata() 

48 self.assertEqual(md.getScalar("FOO"), "BAR") 

49 

50 def testExposure(self): 

51 inExposure = afwImage.ExposureF(self.maskedImage) 

52 outExposure = exposureFromImage(inExposure) 

53 self.assertIs(inExposure, outExposure) 

54 

55 def testImage(self): 

56 image = self.maskedImage.getImage() 

57 exposure = exposureFromImage(image) 

58 self.assertImagesEqual(image, exposure.getMaskedImage().getImage()) 

59 

60 def testMaskedImage(self): 

61 exposure = exposureFromImage(self.maskedImage) 

62 self.assertMaskedImagesEqual(self.maskedImage, exposure.getMaskedImage()) 

63 

64 def testDecoratedImageBadWcs(self): 

65 """Test that exposureFromImage() attaches a None wcs to the exposure 

66 when the WCS cannot be constructed 

67 """ 

68 image = self.maskedImage.getImage() 

69 decoImage = afwImage.DecoratedImageF(image) 

70 metadata = PropertyList() 

71 metadata.set("CTYPE1", "RA---TPV") 

72 metadata.set("CTYPE2", "DEC--TPV") 

73 decoImage.setMetadata(metadata) 

74 exposure = exposureFromImage(decoImage) 

75 self.assertIs(exposure.getWcs(), None) 

76 

77 

78def makeRampMaskedImage(width, height, imgClass=afwImage.MaskedImageF): 

79 """Make a ramp image of the specified size and image class 

80 

81 Image values start from 0 at the lower left corner and increase by 1 along 

82 rows. Variance values equal image values + 100. 

83 Mask values equal image values modulo 8 bits (leaving plenty of unused 

84 values). 

85 """ 

86 mi = imgClass(width, height) 

87 image = mi.getImage() 

88 mask = mi.getMask() 

89 variance = mi.getVariance() 

90 val = 0 

91 for yInd in range(height): 

92 for xInd in range(width): 

93 image[xInd, yInd, afwImage.LOCAL] = val 

94 variance[xInd, yInd, afwImage.LOCAL] = val + 100 

95 mask[xInd, yInd, afwImage.LOCAL] = val % 0x100 

96 val += 1 

97 return mi 

98 

99 

100class MemoryTester(lsst.utils.tests.MemoryTestCase): 

101 pass 

102 

103 

104def setup_module(module): 

105 lsst.utils.tests.init() 

106 

107 

108if __name__ == "__main__": 108 ↛ 109line 108 didn't jump to line 109, because the condition on line 108 was never true

109 lsst.utils.tests.init() 

110 unittest.main()