to listen on in network-oriented tests has been refined in an effort to
facilitate running multiple instances of the entire regression test suite
in parallel without issue. test_support.bind_port() has been fixed such
that it will always return a unique port -- which wasn't always the case
with the previous implementation, especially if socket options had been
set that affected address reuse (i.e. SO_REUSEADDR, SO_REUSEPORT). The
new implementation of bind_port() will actually raise an exception if it
is passed an AF_INET/SOCK_STREAM socket with either the SO_REUSEADDR or
SO_REUSEPORT socket option set. Furthermore, if available, bind_port()
will set the SO_EXCLUSIVEADDRUSE option on the socket it's been passed.
This currently only applies to Windows. This option prevents any other
sockets from binding to the host/port we've bound to, thus removing the
possibility of the 'non-deterministic' behaviour, as Microsoft puts it,
that occurs when a second SOCK_STREAM socket binds and accepts to a
host/port that's already been bound by another socket. The optional
preferred port parameter to bind_port() has been removed. Under no
circumstances should tests be hard coding ports!
test_support.find_unused_port() has also been introduced, which will pass
a temporary socket object to bind_port() in order to obtain an unused port.
The temporary socket object is then closed and deleted, and the port is
returned. This method should only be used for obtaining an unused port
in order to pass to an external program (i.e. the -accept [port] argument
to openssl's s_server mode) or as a parameter to a server-oriented class
that doesn't give you direct access to the underlying socket used.
Finally, test_support.HOST has been introduced, which should be used for
the host argument of any relevant socket calls (i.e. bind and connect).
The following tests were updated to following the new conventions:
test_socket, test_smtplib, test_asyncore, test_ssl, test_httplib,
test_poplib, test_ftplib, test_telnetlib, test_socketserver,
test_asynchat and test_socket_ssl.
It is now possible for multiple instances of the regression test suite to
run in parallel without issue.
before timing out. This doesn't change the duration of the test under
normal circumstances. This is targetted at fixing the spurious failures
on the FreeBSD buildbot primarily.
(This may fail on some slow platforms, but we can fix those cases which
should be relatively isolated and easier to find now.)
Move two test cases that didn't require a server to be started
to a separate TestCase. These tests were taking 3 seconds which
is what the timeout was set to.
and tests for NOOP, RSET, and VRFY. Corrected typo in a comment for
testNonnumericPort. Added a check for constructing SMTP objects when
non-numeric ports are included in the host name. Derived a server from
SMTPServer to test various ESMTP/SMTP capabilities. Check that a
second HELO to DebuggingServer returns an error. [GSoC - Alan McIntyre]
DebuggingServerTests, construct SMTP objects with a localhost argument
to avoid abysmally long FQDN lookups (not relevant to items under
test) on some machines that would cause the test to fail. Moved server
setup code in the server function inside the try block to avoid the
possibility of setup failure hanging the test. Minor edits to conform
to PEP 8. [GSoC - Alan McIntyre]
smtpd.DebuggingServer. Change to use global host & port number
variables. Modified the 'server' to take a string to send back in
order to vary test server responses. Added a test for the reaction of
smtplib.SMTP to a non-200 HELO response. [GSoC - Alan McIntyre]
Trent Nelson
Neal Norwitz
Facundo Batista