--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mercurial/httpclient/tests/util.py	Fri May 06 09:57:55 2011 -0500
@@ -0,0 +1,160 @@
+# Copyright 2010, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+import difflib
+import socket
+
+import http
+
+
+class MockSocket(object):
+    """Mock non-blocking socket object.
+
+    This is ONLY capable of mocking a nonblocking socket.
+
+    Attributes:
+      early_data: data to always send as soon as end of headers is seen
+      data: a list of strings to return on recv(), with the
+            assumption that the socket would block between each
+            string in the list.
+      read_wait_sentinel: data that must be written to the socket before
+                          beginning the response.
+      close_on_empty: If true, close the socket when it runs out of data
+                      for the client.
+    """
+    def __init__(self, af, socktype, proto):
+        self.af = af
+        self.socktype = socktype
+        self.proto = proto
+
+        self.early_data = []
+        self.data = []
+        self.remote_closed = self.closed = False
+        self.close_on_empty = False
+        self.sent = ''
+        self.read_wait_sentinel = http._END_HEADERS
+
+    def close(self):
+        self.closed = True
+
+    def connect(self, sa):
+        self.sa = sa
+
+    def setblocking(self, timeout):
+        assert timeout == 0
+
+    def recv(self, amt=-1):
+        if self.early_data:
+            datalist = self.early_data
+        elif not self.data:
+            return ''
+        else:
+            datalist = self.data
+        if amt == -1:
+            return datalist.pop(0)
+        data = datalist.pop(0)
+        if len(data) > amt:
+            datalist.insert(0, data[amt:])
+        if not self.data and not self.early_data and self.close_on_empty:
+            self.remote_closed = True
+        return data[:amt]
+
+    @property
+    def ready_for_read(self):
+        return ((self.early_data and http._END_HEADERS in self.sent)
+                or (self.read_wait_sentinel in self.sent and self.data)
+                or self.closed)
+
+    def send(self, data):
+        # this is a horrible mock, but nothing needs us to raise the
+        # correct exception yet
+        assert not self.closed, 'attempted to write to a closed socket'
+        assert not self.remote_closed, ('attempted to write to a'
+                                        ' socket closed by the server')
+        if len(data) > 8192:
+            data = data[:8192]
+        self.sent += data
+        return len(data)
+
+
+def mockselect(r, w, x, timeout=0):
+    """Simple mock for select()
+    """
+    readable = filter(lambda s: s.ready_for_read, r)
+    return readable, w[:], []
+
+
+def mocksslwrap(sock, keyfile=None, certfile=None,
+                server_side=False, cert_reqs=http.socketutil.CERT_NONE,
+                ssl_version=http.socketutil.PROTOCOL_SSLv23, ca_certs=None,
+                do_handshake_on_connect=True,
+                suppress_ragged_eofs=True):
+    return sock
+
+
+def mockgetaddrinfo(host, port, unused, streamtype):
+    assert unused == 0
+    assert streamtype == socket.SOCK_STREAM
+    if host.count('.') != 3:
+        host = '127.0.0.42'
+    return [(socket.AF_INET, socket.SOCK_STREAM, socket.IPPROTO_TCP, '',
+             (host, port))]
+
+
+class HttpTestBase(object):
+    def setUp(self):
+        self.orig_socket = socket.socket
+        socket.socket = MockSocket
+
+        self.orig_getaddrinfo = socket.getaddrinfo
+        socket.getaddrinfo = mockgetaddrinfo
+
+        self.orig_select = http.select.select
+        http.select.select = mockselect
+
+        self.orig_sslwrap = http.socketutil.wrap_socket
+        http.socketutil.wrap_socket = mocksslwrap
+
+    def tearDown(self):
+        socket.socket = self.orig_socket
+        http.select.select = self.orig_select
+        http.socketutil.wrap_socket = self.orig_sslwrap
+        socket.getaddrinfo = self.orig_getaddrinfo
+
+    def assertStringEqual(self, l, r):
+        try:
+            self.assertEqual(l, r, ('failed string equality check, '
+                                    'see stdout for details'))
+        except:
+            add_nl = lambda li: map(lambda x: x + '\n', li)
+            print 'failed expectation:'
+            print ''.join(difflib.unified_diff(
+                add_nl(l.splitlines()), add_nl(r.splitlines()),
+                fromfile='expected', tofile='got'))
+            raise
+# no-check-code