fix issue8 : avoid errors caused by logging module wanting to close already closed streams.

The issue arose if logging was initialized while capturing was enabled
and then capturing streams were closed before process exit, leading
to the logging module to complain.

CHANGELOG

@@ -1,6 +1,7 @@
 Changes between 2.0.0 and 2.0.1.dev1
 ----------------------------------------------
 
+- fix issue8: no logging errors at process exit
 - refinements to "collecting" output on non-ttys
 - refine internal plugin registration and --traceconfig output
 - introduce a mechanism to prevent/unregister plugins from the 

_pytest/capture.py

@@ -26,7 +26,9 @@ def pytest_unconfigure(config):
     capman = config.pluginmanager.getplugin('capturemanager')
     while capman._method2capture:
         name, cap = capman._method2capture.popitem()
-        cap.reset()
+        # XXX logging module may wants to close it itself on process exit
+        # otherwise we could do finalization here and call "reset()".
+        cap.suspend()
 
 class NoCapture:
     def startall(self):

_pytest/core.py

@@ -151,15 +151,15 @@ class PluginManager(object):
         except ImportError:
             return # XXX issue a warning
         for ep in iter_entry_points('pytest11'):
-            if ep.name in self._name2plugin:
+            name = ep.name
+            if name.startswith("pytest_"):
+                name = name[7:]
+            if ep.name in self._name2plugin or name in self._name2plugin:
                 continue
             try:
                 plugin = ep.load()
             except DistributionNotFound:
                 continue
-            name = ep.name
-            if name.startswith("pytest_"):
-                name = name[7:]
             self.register(plugin, name=name)
 
     def consider_preparse(self, args):

testing/test_capture.py

@@ -306,6 +306,26 @@ class TestLoggingInteraction:
             # verify proper termination
             assert "closed" not in s
 
+    def test_logging_initialized_in_test(self, testdir):
+        p = testdir.makepyfile("""
+            import sys
+            def test_something():
+                # pytest does not import logging
+                assert 'logging' not in sys.modules
+                import logging
+                logging.basicConfig()
+                logging.warn("hello432")
+                assert 0
+        """)
+        result = testdir.runpytest(p, "--traceconfig",
+            "-p", "no:capturelog")
+        assert result.ret != 0
+        result.stdout.fnmatch_lines([
+            "*hello432*",
+        ])
+        assert 'operation on closed file' not in result.stderr.str()
+
+
 class TestCaptureFuncarg:
     def test_std_functional(self, testdir):
         reprec = testdir.inline_runsource("""

tox.ini

@@ -73,3 +73,4 @@ rsyncdirs=tox.ini pytest.py _pytest testing
 python_files=test_*.py *_test.py
 python_classes=Test Acceptance
 python_functions=test
+pep8ignore = E401