test/subclassing.py

   1 #!/usr/bin/env python
   2 #
   3 # __COPYRIGHT__
   4 #
   5 # Permission is hereby granted, free of charge, to any person obtaining
   6 # a copy of this software and associated documentation files (the
   7 # "Software"), to deal in the Software without restriction, including
   8 # without limitation the rights to use, copy, modify, merge, publish,
   9 # distribute, sublicense, and/or sell copies of the Software, and to
  10 # permit persons to whom the Software is furnished to do so, subject to
  11 # the following conditions:
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  13 # The above copyright notice and this permission notice shall be included
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  15 #
  16 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
  17 # KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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  19 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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  21 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  22 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23 #
  24
  25 __revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"
  26
  27 """
  28 Verify that we can trivially subclass our "public" classes.  Also
  29 verify that we can use a trivial subclass of new-style str classes
  30 as well as UserString as Builder input.
  31 """
  32
  33 import TestSCons
  34
  35 test = TestSCons.TestSCons()
  36
  37 test.write('SConstruct', """
  38 copy_action = Copy('$TARGET', '$SOURCE')
  39
  40 # Some day, we'd probably like people to be able to subclass Action and
  41 # Builder, but that's going to take some serious class-hackery to turn
  42 # our factory function into the class itself.
  43 #class my_Action(Action):
  44 #    pass
  45 #class my_Builder(Builder):
  46 #    pass
  47 class my_Scanner(Scanner):
  48     pass
  49 class my_Environment(Environment):
  50     pass
  51 env = my_Environment()
  52 env.Command('f0.out', 'f0.in', copy_action)
  53
  54 try:
  55     from collections import UserString
  56 except ImportError:
  57     from UserString import UserString
  58 try:
  59     class mystr(str):
  60         pass
  61 except TypeError:
  62     class mystr(UserString):
  63         pass
  64
  65 Command(mystr('f1.out'),        mystr('f1.in'), copy_action)
  66 Command(UserString('f2.out'),   UserString('f2.in'),    copy_action)
  67
  68 Install(mystr('install'),       mystr('f1.out'))
  69 Install(mystr('install'),       UserString('f2.out'))
  70 """)
  71
  72 test.write('f0.in', "f0.in\n")
  73 test.write('f1.in', "f1.in\n")
  74 test.write('f2.in', "f2.in\n")
  75
  76 test.run(arguments = '.')
  77
  78 test.must_match('f0.out',              "f0.in\n")
  79 test.must_match(['install', 'f1.out'], "f1.in\n")
  80 test.must_match(['install', 'f2.out'], "f2.in\n")
  81
  82 test.pass_test()
  83
  84 # Local Variables:
  85 # tab-width:4
  86 # indent-tabs-mode:nil
  87 # End:
  88 # vim: set expandtab tabstop=4 shiftwidth=4: