Source Code for Module mvpa.tests.test_externals

 1  # emacs: -*- mode: python; py-indent-offset: 4; indent-tabs-mode: nil -*- 
 2  # vi: set ft=python sts=4 ts=4 sw=4 et: 
 3  ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ## 
 4  # 
 5  #   See COPYING file distributed along with the PyMVPA package for the 
 6  #   copyright and license terms. 
 7  # 
 8  ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ## 
 9  """Test externals checking""" 
10   
11  import unittest 
12   
13  from mvpa import cfg 
14  from mvpa.base import externals 
15  from mvpa.support import copy 
16   
17 -class TestExternals(unittest.TestCase): 
18   
19 -    def setUp(self): 
20          self.backup = [] 
21          # paranoid check 
22          self.cfgstr = str(cfg) 
23          # clean up externals cfg for proper testing 
24          if cfg.has_section('externals'): 
25              self.backup = copy.deepcopy(cfg.items('externals')) 
26          cfg.remove_section('externals') 
27   
28   
29 -    def tearDown(self): 
30          if len(self.backup): 
31              # wipe existing one completely 
32              if cfg.has_section('externals'): 
33                  cfg.remove_section('externals') 
34              cfg.add_section('externals') 
35              for o,v in self.backup: 
36                  cfg.set('externals', o,v) 
37          # paranoid check 
38          # since order can't be guaranteed, lets check 
39          # each item after sorting 
40          self.failUnlessEqual(sorted(self.cfgstr.split('\n')), 
41                               sorted(str(cfg).split('\n'))) 
42   
43   
44 -    def testExternals(self): 
45          self.failUnlessRaises(ValueError, externals.exists, 'BoGuS') 
46   
47   
48 -    def testExternalsNoDoubleInvocation(self): 
49          # no external should be checking twice (unless specified 
50          # explicitely) 
51   
52          class Checker(object): 
53              """Helper class to increment count of actual checks""" 
54              def __init__(self): self.checked = 0 
55              def check(self): self.checked += 1 
56   
57          checker = Checker() 
58   
59          externals._KNOWN['checker'] = 'checker.check()' 
60          externals.__dict__['checker'] = checker 
61          externals.exists('checker') 
62          self.failUnlessEqual(checker.checked, 1) 
63          externals.exists('checker') 
64          self.failUnlessEqual(checker.checked, 1) 
65          externals.exists('checker', force=True) 
66          self.failUnlessEqual(checker.checked, 2) 
67          externals.exists('checker') 
68          self.failUnlessEqual(checker.checked, 2) 
69   
70          # restore original externals 
71          externals.__dict__.pop('checker') 
72          externals._KNOWN.pop('checker') 
73   
74   
75 -    def testExternalsCorrect2ndInvocation(self): 
76          # always fails 
77          externals._KNOWN['checker2'] = 'raise ImportError' 
78   
79          self.failUnless(not externals.exists('checker2'), 
80                          msg="Should be False on 1st invocation") 
81   
82          self.failUnless(not externals.exists('checker2'), 
83                          msg="Should be False on 2nd invocation as well") 
84   
85          externals._KNOWN.pop('checker2') 
86   
87   
88   
89 -def suite(): 
90      return unittest.makeSuite(TestExternals) 
91   
92   
93  if __name__ == '__main__': 
94      import runner 
95