Merged revisions 3759-3762 via svnmerge from

Merged revisions 3759-3762 via svnmerge from
http://scons.tigris.org/svn/scons/branches/sgk_subst

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  r3759 | stevenknight | 2008-11-03 17:59:30 -0800 (Mon, 03 Nov 2008) | 3 lines

  Refactor individual unit test methods into separate TestCase
  sbblcasses, so we can start re-using test fixtures.
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  r3760 | stevenknight | 2008-11-03 18:43:01 -0800 (Mon, 03 Nov 2008) | 4 lines

  Refactor the overlapping classes and dictionaries of values for testing
  scons_subst() and scons_subst_list() into the common SubstTestCase base
  class so we can re-use the same input for testing the new code.
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  r3761 | stevenknight | 2008-11-03 22:43:51 -0800 (Mon, 03 Nov 2008) | 3 lines

  Split the large test methods into separate test methods for
  specific, individual pieces of functionality.
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  r3762 | stevenknight | 2008-11-04 05:06:43 -0800 (Tue, 04 Nov 2008) | 4 lines

  Share code the basic comparison code between the scons_subst()
  and scons_subst_list() test cases by moving it into the base class
  and wrapping the call.
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git-svn-id: http://scons.tigris.org/svn/scons/trunk@3779 fdb21ef1-2011-0410-befe-b5e4ea1792b1