Dropped cyclic import from modules to tests: they were only working
because a second copy of the package was found in the project dir.
Use relative import so that 2to3 can do a good conversion.
We mangle the encoding names a little bit before asking it to the
backend: be sure to be able to find the equivalent Python code back or
decoding (unicode cast or Py3) will barf.
We don't do somersaults to ensure people can use snowmen as transaction
ids anyway: it would require passing the connection to xid_ensure and
down below to use the correct encoding.
If the connection is sync, notices will be processed by pq_fetch()
downstream.
If the connection is async, here we have only sent the query: no result
is ready yet, and neither notices have had a chance to arrive: they will
be retrieved later by pq_is_busy().
Added tests to check the above statement don't break.
* tests/*.py: use the DSN constructed in tests/__init__.py.
* tests/__init__.py: allow setting the host, port and user for the
DSN used by the tests through the environment.
the Connection and Cursor "closed" attributes.
* psycopg/cursor_type.c (psyco_curs_get_closed): add a "closed"
attribute to cursors. It will be True if either the cursor or its
associated connection are closed. This fixes bug #164.
