Skip debugger tests for pre-2.5 python versions and make them 2.5 compatible

Cython/Compiler/Tests/TestParseTreeTransforms.py

 import os
 
-from Cython.Debugger import DebugWriter
 from Cython.Compiler import CmdLine
 from Cython.TestUtils import TransformTest
 from Cython.Compiler.ParseTreeTransforms import *
 from Cython.Compiler.Nodes import *
-from Cython.Debugger.Tests import TestLibCython
+
 
 class TestNormalizeTree(TransformTest):
     def test_parserbehaviour_is_what_we_coded_for(self):
@@ -145,7 +144,14 @@ class TestWithTransform(object): # (TransformTest): # Disabled!
         """, t)
                           
 
-class TestDebugTransform(TestLibCython.DebuggerTestCase):
+if sys.version_info[:2] > (2, 4):
+    from Cython.Debugger import DebugWriter
+    from Cython.Debugger.Tests.TestLibCython import DebuggerTestCase
+else:
+    # skip test, don't let it inherit unittest.TestCase
+    DebuggerTestCase = object
+
+class TestDebugTransform(DebuggerTestCase):
     
     def elem_hasattrs(self, elem, attrs):
         # we shall supporteth python 2.3 !
@@ -209,6 +215,9 @@ class TestDebugTransform(TestLibCython.DebuggerTestCase):
             raise
             
 
+
+    
+
 if __name__ == "__main__":
     import unittest
     unittest.main()

Cython/Debugger/Tests/TestLibCython.py

+from __future__ import with_statement
+
 import os
 import re
 import sys

runtests.py

@@ -624,6 +624,8 @@ class CythonUnitTestCase(CythonCompileTestCase):
         except Exception:
             pass
 
+include_debugger = sys.version_info[:2] > (2, 4)
+
 def collect_unittests(path, module_prefix, suite, selectors):
     def file_matches(filename):
         return filename.startswith("Test") and filename.endswith(".py")
@@ -633,7 +635,11 @@ def collect_unittests(path, module_prefix, suite, selectors):
 
     loader = unittest.TestLoader()
     
+    if include_debugger:
         skipped_dirs = []
+    else:
+        cython_dir = os.path.dirname(os.path.abspath(__file__))
+        skipped_dirs = [os.path.join(cython_dir, 'Cython', 'Debugger')]
 
     for dirpath, dirnames, filenames in os.walk(path):
         if dirpath != path and "__init__.py" not in filenames:
@@ -658,12 +664,17 @@ def collect_unittests(path, module_prefix, suite, selectors):
                         module = getattr(module, x)
                     suite.addTests([loader.loadTestsFromModule(module)])
 
+
+
 def collect_doctests(path, module_prefix, suite, selectors):
     def package_matches(dirname):
+        if dirname == 'Debugger' and not include_debugger:
+            return False
         return dirname not in ("Mac", "Distutils", "Plex")
     def file_matches(filename):
         filename, ext = os.path.splitext(filename)
-        blacklist = ('libcython', 'libpython', 'test_libcython_in_gdb')
+        blacklist = ['libcython', 'libpython', 'test_libcython_in_gdb', 
+                     'TestLibCython']
         return (ext == '.py' and not
                 '~' in filename and not
                 '#' in filename and not