Coverage for tests/test_matplotlibFormatter.py: 47%

39 statements  

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1# This file is part of daf_butler. 

2# 

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6# See the COPYRIGHT file at the top-level directory of this distribution 

7# for details of code ownership. 

8# 

9# This software is dual licensed under the GNU General Public License and also 

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14# 

15# This program is free software: you can redistribute it and/or modify 

16# it under the terms of the GNU General Public License as published by 

17# the Free Software Foundation, either version 3 of the License, or 

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19# 

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21# but WITHOUT ANY WARRANTY; without even the implied warranty of 

22# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 

23# GNU General Public License for more details. 

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27 

28"""Tests for MatplotlibFormatter. 

29""" 

30 

31import os 

32import tempfile 

33import unittest 

34from random import Random 

35 

36try: 

37 import matplotlib 

38 

39 matplotlib.use("Agg") 

40 from matplotlib import pyplot 

41except ImportError: 

42 pyplot = None 

43 

44import filecmp 

45 

46from lsst.daf.butler import Butler, DatasetType 

47from lsst.daf.butler.tests.utils import makeTestTempDir, removeTestTempDir 

48 

49TESTDIR = os.path.abspath(os.path.dirname(__file__)) 

50 

51 

52@unittest.skipIf(pyplot is None, "skipping test because matplotlib import failed") 

53class MatplotlibFormatterTestCase(unittest.TestCase): 

54 """Test for MatplotlibFormatter.""" 

55 

56 RANDOM_SEED = 10 

57 

58 def setUp(self): 

59 self.root = makeTestTempDir(TESTDIR) 

60 Butler.makeRepo(self.root) 

61 # Create a random image for testing 

62 self.rng = Random(self.RANDOM_SEED) 

63 

64 def tearDown(self): 

65 removeTestTempDir(self.root) 

66 

67 def testMatplotlibFormatter(self): 

68 butler = Butler.from_config(self.root, run="testrun") 

69 datasetType = DatasetType("test_plot", [], "Plot", universe=butler.dimensions) 

70 butler.registry.registerDatasetType(datasetType) 

71 # Does not have to be a random image 

72 pyplot.imshow( 

73 [ 

74 self.rng.sample(range(50), 10), 

75 self.rng.sample(range(50), 10), 

76 self.rng.sample(range(50), 10), 

77 ] 

78 ) 

79 ref = butler.put(pyplot.gcf(), datasetType) 

80 uri = butler.getURI(ref) 

81 

82 # Following test needs a local file 

83 with uri.as_local() as local, tempfile.NamedTemporaryFile(suffix=".png") as file: 

84 pyplot.gcf().savefig(file.name) 

85 self.assertTrue(filecmp.cmp(local.ospath, file.name, shallow=True)) 

86 self.assertTrue(butler.exists(ref)) 

87 with self.assertRaises(ValueError): 

88 butler.get(ref) 

89 butler.pruneDatasets([ref], unstore=True, purge=True) 

90 self.assertFalse(butler.exists(ref)) 

91 

92 

93if __name__ == "__main__": 

94 unittest.main()