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https://github.com/psycopg/psycopg2.git
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f24de0357f
It's not so much about tests being slow: some just get stuck and timeout travis. Skipped all tests taking about more than 0.2s to run on my laptop. Fast testing takes about 8s instead of 24.
120 lines
4.1 KiB
Python
Executable File
120 lines
4.1 KiB
Python
Executable File
#!/usr/bin/env python
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# test_green.py - unit test for async wait callback
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#
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# Copyright (C) 2010-2011 Daniele Varrazzo <daniele.varrazzo@gmail.com>
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#
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# psycopg2 is free software: you can redistribute it and/or modify it
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# under the terms of the GNU Lesser General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# In addition, as a special exception, the copyright holders give
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# permission to link this program with the OpenSSL library (or with
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# modified versions of OpenSSL that use the same license as OpenSSL),
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# and distribute linked combinations including the two.
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#
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# You must obey the GNU Lesser General Public License in all respects for
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# all of the code used other than OpenSSL.
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#
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# psycopg2 is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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# License for more details.
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import unittest
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import psycopg2
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import psycopg2.extensions
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import psycopg2.extras
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from testutils import ConnectingTestCase, slow
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class ConnectionStub(object):
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"""A `connection` wrapper allowing analysis of the `poll()` calls."""
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def __init__(self, conn):
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self.conn = conn
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self.polls = []
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def fileno(self):
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return self.conn.fileno()
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def poll(self):
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rv = self.conn.poll()
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self.polls.append(rv)
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return rv
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class GreenTestCase(ConnectingTestCase):
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def setUp(self):
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self._cb = psycopg2.extensions.get_wait_callback()
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psycopg2.extensions.set_wait_callback(psycopg2.extras.wait_select)
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ConnectingTestCase.setUp(self)
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def tearDown(self):
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ConnectingTestCase.tearDown(self)
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psycopg2.extensions.set_wait_callback(self._cb)
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def set_stub_wait_callback(self, conn):
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stub = ConnectionStub(conn)
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psycopg2.extensions.set_wait_callback(
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lambda conn: psycopg2.extras.wait_select(stub))
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return stub
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@slow
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def test_flush_on_write(self):
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# a very large query requires a flush loop to be sent to the backend
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conn = self.conn
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stub = self.set_stub_wait_callback(conn)
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curs = conn.cursor()
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for mb in 1, 5, 10, 20, 50:
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size = mb * 1024 * 1024
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del stub.polls[:]
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curs.execute("select %s;", ('x' * size,))
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self.assertEqual(size, len(curs.fetchone()[0]))
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if stub.polls.count(psycopg2.extensions.POLL_WRITE) > 1:
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return
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# This is more a testing glitch than an error: it happens
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# on high load on linux: probably because the kernel has more
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# buffers ready. A warning may be useful during development,
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# but an error is bad during regression testing.
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import warnings
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warnings.warn("sending a large query didn't trigger block on write.")
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def test_error_in_callback(self):
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# behaviour changed after issue #113: if there is an error in the
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# callback for the moment we don't have a way to reset the connection
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# without blocking (ticket #113) so just close it.
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conn = self.conn
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curs = conn.cursor()
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curs.execute("select 1") # have a BEGIN
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curs.fetchone()
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# now try to do something that will fail in the callback
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psycopg2.extensions.set_wait_callback(lambda conn: 1 // 0)
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self.assertRaises(ZeroDivisionError, curs.execute, "select 2")
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self.assert_(conn.closed)
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def test_dont_freak_out(self):
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# if there is an error in a green query, don't freak out and close
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# the connection
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conn = self.conn
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curs = conn.cursor()
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self.assertRaises(psycopg2.ProgrammingError,
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curs.execute, "select the unselectable")
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# check that the connection is left in an usable state
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self.assert_(not conn.closed)
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conn.rollback()
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curs.execute("select 1")
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self.assertEqual(curs.fetchone()[0], 1)
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def test_suite():
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return unittest.TestLoader().loadTestsFromName(__name__)
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if __name__ == "__main__":
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unittest.main()
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