add test_close_backend_fd.py

greentest/test_close_backend_fd.py

+import os
+import traceback
+import gevent
+
+
+for _ in xrange(2):
+    for backend in gevent.core.supported_backends():
+        print 'Testing backend: %r' % backend
+        hub = gevent.get_hub(backend)
+        print hub
+        assert hub.loop.backend == backend, (hub.loop.backend, backend)
+        gevent.sleep(0.001)
+        fd = getattr(hub.loop, 'backend_fd', None)
+        if fd is not None and fd >= 0:
+            os.close(hub.loop.backend_fd)
+            try:
+                gevent.sleep(0.001)
+            except SystemError, ex:
+                if '(libev)' not in str(ex):
+                    raise
+                traceback.print_exc()
+        else:
+            print 'Skipping %r' % backend
+        hub.destroy()
+        print