asyncio: sync with Tulip

* PipeHandle now uses None instead of -1 for a closed handle
* Sort imports in windows_utils.
* Fix test_events on Python older than 3.5. Skip SSL tests on the
  ProactorEventLoop if ssl.MemoryIO is missing
* Fix BaseEventLoop._create_connection_transport(). Close the transport if the
  creation of the transport (if the waiter) gets an exception.
* _ProactorBasePipeTransport now sets _sock to None when the transport is
  closed.
* Fix BaseSubprocessTransport.close(). Ignore pipes for which the protocol is
  not set yet (still equal to None).
* TestLoop.close() now calls the close() method of the parent class
  (BaseEventLoop).
* Cleanup BaseSelectorEventLoop: create the protocol on a separated line for
  readability and ease debugging.
* Fix BaseSubprocessTransport._kill_wait(). Set the _returncode attribute, so
  close() doesn't try to terminate the process.
* Tests: explicitly close event loops and transports
* UNIX pipe transports: add closed/closing in repr(). Add "closed" or "closing"
  state in the __repr__() method of _UnixReadPipeTransport and
  _UnixWritePipeTransport classes.

1 files changed, 12 insertions, 2 deletions

diff --git a/Lib/asyncio/unix_events.py b/Lib/asyncio/unix_events.py
index 1a4d418..14b4843 100644
--- a/Lib/asyncio/unix_events.py
+++ b/Lib/asyncio/unix_events.py
@@ -301,7 +301,12 @@ class _UnixReadPipeTransport(transports.ReadTransport):
             self._loop.call_soon(waiter._set_result_unless_cancelled, None)
 
     def __repr__(self):
-        info = [self.__class__.__name__, 'fd=%s' % self._fileno]
+        info = [self.__class__.__name__]
+        if self._pipe is None:
+            info.append('closed')
+        elif self._closing:
+            info.append('closing')
+        info.append('fd=%s' % self._fileno)
         if self._pipe is not None:
             polling = selector_events._test_selector_event(
                           self._loop._selector,
@@ -404,7 +409,12 @@ class _UnixWritePipeTransport(transports._FlowControlMixin,
             self._loop.call_soon(waiter._set_result_unless_cancelled, None)
 
     def __repr__(self):
-        info = [self.__class__.__name__, 'fd=%s' % self._fileno]
+        info = [self.__class__.__name__]
+        if self._pipe is None:
+            info.append('closed')
+        elif self._closing:
+            info.append('closing')
+        info.append('fd=%s' % self._fileno)
         if self._pipe is not None:
             polling = selector_events._test_selector_event(
                           self._loop._selector,