Merged revisions 70554,70588-70589,70598,70605,70611-70621,70623-70624,70626-70627 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

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  r70554 | benjamin.peterson | 2009-03-23 16:25:15 -0500 (Mon, 23 Mar 2009) | 1 line

  complain when there's no last exception
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  r70588 | benjamin.peterson | 2009-03-24 17:56:32 -0500 (Tue, 24 Mar 2009) | 1 line

  fix newline issue in test summary
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  r70589 | benjamin.peterson | 2009-03-24 18:07:07 -0500 (Tue, 24 Mar 2009) | 1 line

  another style nit
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  r70598 | benjamin.peterson | 2009-03-25 16:24:04 -0500 (Wed, 25 Mar 2009) | 1 line

  add shorthands for expected failures and unexpected success
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  r70605 | benjamin.peterson | 2009-03-26 11:32:23 -0500 (Thu, 26 Mar 2009) | 1 line

  remove uneeded function
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  r70611 | benjamin.peterson | 2009-03-26 13:35:37 -0500 (Thu, 26 Mar 2009) | 1 line

  add much better tests for python version information parsing
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  r70612 | benjamin.peterson | 2009-03-26 13:55:48 -0500 (Thu, 26 Mar 2009) | 1 line

  more and more implementations now support sys.subversion
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  r70613 | benjamin.peterson | 2009-03-26 13:58:30 -0500 (Thu, 26 Mar 2009) | 1 line

  roll old test in with new one
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  r70614 | benjamin.peterson | 2009-03-26 14:09:21 -0500 (Thu, 26 Mar 2009) | 1 line

  add support for PyPy
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  r70615 | benjamin.peterson | 2009-03-26 14:58:18 -0500 (Thu, 26 Mar 2009) | 5 lines

  add some useful utilities for skipping tests with unittest's new skipping ability

  most significantly apply a modified portion of the patch from #4242 with
  patches for skipping implementation details
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  r70616 | benjamin.peterson | 2009-03-26 15:05:50 -0500 (Thu, 26 Mar 2009) | 1 line

  rename TestCase.skip() to skipTest() because it causes annoying problems with trial #5571
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  r70617 | benjamin.peterson | 2009-03-26 15:17:27 -0500 (Thu, 26 Mar 2009) | 1 line

  apply the second part of #4242's patch; classify all the implementation details in test_descr
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  r70618 | benjamin.peterson | 2009-03-26 15:48:25 -0500 (Thu, 26 Mar 2009) | 1 line

  remove test_support.TestSkipped and just use unittest.SkipTest
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  r70619 | benjamin.peterson | 2009-03-26 15:49:40 -0500 (Thu, 26 Mar 2009) | 1 line

  fix naming
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  r70620 | benjamin.peterson | 2009-03-26 16:10:30 -0500 (Thu, 26 Mar 2009) | 1 line

  fix incorrect auto-translation of TestSkipped -> unittest.SkipTest
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  r70621 | benjamin.peterson | 2009-03-26 16:11:16 -0500 (Thu, 26 Mar 2009) | 1 line

  must pass argument to get expected behavior ;)
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  r70623 | benjamin.peterson | 2009-03-26 16:30:10 -0500 (Thu, 26 Mar 2009) | 1 line

  add missing import
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  r70624 | benjamin.peterson | 2009-03-26 16:30:54 -0500 (Thu, 26 Mar 2009) | 1 line

  ** is required here
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  r70626 | benjamin.peterson | 2009-03-26 16:40:29 -0500 (Thu, 26 Mar 2009) | 1 line

  update email tests to use SkipTest
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  r70627 | benjamin.peterson | 2009-03-26 16:44:43 -0500 (Thu, 26 Mar 2009) | 1 line

  fix another name
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1 files changed, 73 insertions, 23 deletions

diff --git a/Lib/test/support.py b/Lib/test/support.py
index 0fa9d6b..e209170 100644
--- a/Lib/test/support.py
+++ b/Lib/test/support.py
@@ -8,12 +8,12 @@ import errno
 import socket
 import sys
 import os
-import os.path
+import platform
 import shutil
 import warnings
 import unittest
 
-__all__ = ["Error", "TestFailed", "TestSkipped", "ResourceDenied", "import_module",
+__all__ = ["Error", "TestFailed", "ResourceDenied", "import_module",
            "verbose", "use_resources", "max_memuse", "record_original_stdout",
            "get_original_stdout", "unload", "unlink", "rmtree", "forget",
            "is_resource_enabled", "requires", "find_unused_port", "bind_port",
@@ -24,7 +24,7 @@ __all__ = ["Error", "TestFailed", "TestSkipped", "ResourceDenied", "import_modul
            "TransientResource", "transient_internet", "run_with_locale",
            "set_memlimit", "bigmemtest", "bigaddrspacetest", "BasicTestRunner",
            "run_unittest", "run_doctest", "threading_setup", "threading_cleanup",
-           "reap_children"]
+           "reap_children", "cpython_only", "check_impl_detail"]
 
 class Error(Exception):
     """Base class for regression test exceptions."""
@@ -32,17 +32,7 @@ class Error(Exception):
 class TestFailed(Error):
     """Test failed."""
 
-class TestSkipped(Error):
-    """Test skipped.
-
-    This can be raised to indicate that a test was deliberatly
-    skipped, but not because a feature wasn't available.  For
-    example, if some resource can't be used, such as the network
-    appears to be unavailable, this should be raised instead of
-    TestFailed.
-    """
-
-class ResourceDenied(TestSkipped):
+class ResourceDenied(unittest.SkipTest):
     """Test skipped because it requested a disallowed resource.
 
     This is raised when a test calls requires() for a resource that
@@ -51,7 +41,7 @@ class ResourceDenied(TestSkipped):
     """
 
 def import_module(name, deprecated=False):
-    """Import the module to be tested, raising TestSkipped if it is not
+    """Import the module to be tested, raising SkipTest if it is not
     available."""
     with warnings.catch_warnings():
         if deprecated:
@@ -60,7 +50,7 @@ def import_module(name, deprecated=False):
         try:
             module = __import__(name, level=0)
         except ImportError:
-            raise TestSkipped("No module named " + name)
+            raise unittest.SkipTest("No module named " + name)
         else:
             return module
 
@@ -124,7 +114,7 @@ def requires(resource, msg=None):
     possibility of False being returned occurs when regrtest.py is executing."""
     # see if the caller's module is __main__ - if so, treat as if
     # the resource was set
-    if sys._getframe().f_back.f_globals.get("__name__") == "__main__":
+    if sys._getframe(1).f_globals.get("__name__") == "__main__":
         return
     if not is_resource_enabled(resource):
         if msg is None:
@@ -357,12 +347,8 @@ def make_bad_fd():
         unlink(TESTFN)
 
 def check_syntax_error(testcase, statement):
-    try:
-        compile(statement, '<test string>', 'exec')
-    except SyntaxError:
-        pass
-    else:
-        testcase.fail('Missing SyntaxError: "%s"' % statement)
+    testcase.assertRaises(SyntaxError, compile, statement,
+                          '<test string>', 'exec')
 
 def open_urlresource(url, *args, **kw):
     import urllib.request, urllib.parse
@@ -522,6 +508,21 @@ def captured_output(stream_name):
 def captured_stdout():
     return captured_output("stdout")
 
+def gc_collect():
+    """Force as many objects as possible to be collected.
+
+    In non-CPython implementations of Python, this is needed because timely
+    deallocation is not guaranteed by the garbage collector.  (Even in CPython
+    this can be the case in case of reference cycles.)  This means that __del__
+    methods may be called later than expected and weakrefs may remain alive for
+    longer than expected.  This function tries its best to force all garbage
+    objects to disappear.
+    """
+    import gc
+    gc.collect()
+    gc.collect()
+    gc.collect()
+
 
 #=======================================================================
 # Decorator for running a function in a different locale, correctly resetting
@@ -681,6 +682,55 @@ class BasicTestRunner:
         test(result)
         return result
 
+def _id(obj):
+    return obj
+
+def requires_resource(resource):
+    if resource_is_enabled(resource):
+        return _id
+    else:
+        return unittest.skip("resource {0!r} is not enabled".format(resource))
+
+def cpython_only(test):
+    """
+    Decorator for tests only applicable on CPython.
+    """
+    return impl_detail(cpython=True)(test)
+
+def impl_detail(msg=None, **guards):
+    if check_impl_detail(**guards):
+        return _id
+    if msg is None:
+        guardnames, default = _parse_guards(guards)
+        if default:
+            msg = "implementation detail not available on {0}"
+        else:
+            msg = "implementation detail specific to {0}"
+        guardnames = sorted(guardnames.keys())
+        msg = msg.format(' or '.join(guardnames))
+    return unittest.skip(msg)
+
+def _parse_guards(guards):
+    # Returns a tuple ({platform_name: run_me}, default_value)
+    if not guards:
+        return ({'cpython': True}, False)
+    is_true = guards.values()[0]
+    assert guards.values() == [is_true] * len(guards)   # all True or all False
+    return (guards, not is_true)
+
+# Use the following check to guard CPython's implementation-specific tests --
+# or to run them only on the implementation(s) guarded by the arguments.
+def check_impl_detail(**guards):
+    """This function returns True or False depending on the host platform.
+       Examples:
+          if check_impl_detail():               # only on CPython (default)
+          if check_impl_detail(jython=True):    # only on Jython
+          if check_impl_detail(cpython=False):  # everywhere except on CPython
+    """
+    guards, default = _parse_guards(guards)
+    return guards.get(platform.python_implementation().lower(), default)
+
+
 
 def _run_suite(suite):
     """Run tests from a unittest.TestSuite-derived class."""