def test_simple(self): p = Pipe() # default constructor self.assertTrue(isinstance(p, io.RawIOBase)) self.assertFalse(p.closed) try: p.fileno() self.fail("fileno should raise IOError") except IOError: pass self.assertFalse(p.isatty()) self.assertTrue(p.readable()) self.assertFalse(p.seekable()) self.assertTrue(p.writable()) # now for our custom attributes self.assertTrue(p.readblocking()) self.assertTrue(p.writeblocking()) self.assertTrue(p.canwrite() == io.DEFAULT_BUFFER_SIZE) self.assertFalse(p.canread()) # now try a quick read and write test data = b"The quick brown fox jumped over the lazy dog" wlen = p.write(data) self.assertTrue(wlen == len(data)) self.assertTrue(p.canwrite() == io.DEFAULT_BUFFER_SIZE - len(data)) self.assertTrue(p.canread()) self.assertTrue(p.read(3) == data[:3]) self.assertTrue(p.canwrite() == io.DEFAULT_BUFFER_SIZE - len(data) + 3) self.assertTrue(p.canread()) # now deal with EOF conditions p.write_eof() try: p.write(b"extra") self.fail("write past EOF") except IOError: pass try: p.canwrite() self.fail("canwrite called past EOF") except IOError: pass self.assertTrue(p.canread(), "But can still read") self.assertFalse(p.closed) self.assertTrue(p.readall() == data[3:]) self.assertTrue(p.canread(), "Can still read") self.assertTrue(p.read(3) == b'') self.assertTrue(len(p.read()) == 0) self.assertTrue(len(p.readall()) == 0) p.close() self.assertTrue(p.closed) try: p.canread() self.fail("canread called on closed pipe") except IOError: pass
class MockSocketBase(object): id_next = 1 id_lock = threading.RLock() def __init__(self): with self.id_lock: self.id = MockSocketBase.id_next MockSocketBase.id_next += 1 self.blocking = True self.send_pipe = Pipe(timeout=10, name="MockSocket.send[%i]" % self.id) self.recv_pipe = Pipe(timeout=10, name="MockSocket.recv[%i]" % self.id) self.send_rbuffer = io.BufferedReader(self.send_pipe) self.recv_wbuffer = io.BufferedWriter(self.recv_pipe) self.io_error = None pass_select = select.select @classmethod def wrap_select(cls, rlist, wlist, xlist, timeout=5): mrlist = [] mwlist = [] mxlist = [] srlist = [] swlist = [] sxlist = [] for r in rlist: if isinstance(r, cls): mrlist.append(r) else: srlist.append(r) for w in wlist: if isinstance(w, cls): mwlist.append(w) else: swlist.append(w) for x in xlist: if isinstance(x, cls): mxlist.append(x) else: sxlist.append(x) if srlist or swlist or sxlist: return cls.pass_select(srlist, swlist, sxlist, timeout) else: return cls.select(mrlist, mwlist, mxlist, timeout) @classmethod def select(cls, rlist, wlist, xlist, timeout=5): the_time = time.time() if timeout is not None: tstop = the_time + timeout else: tstop = 0 while timeout is None or the_time <= tstop: # we must always go around at least once rs = [] ws = [] for r in rlist: try: if r.recv_pipe.canread(): rs.append(r) except IOError: # raise a socket error raise select.error(errno.EPIPE, os.strerror(errno.EPIPE)) for w in wlist: try: if w.send_pipe.canwrite(): ws.append(w) except IOError: # raise a socket error raise select.error(errno.EPIPE, os.strerror(errno.EPIPE)) if rs or ws: return rs, ws, [] else: time.sleep(1) the_time = time.time() return [], [], [] def setblocking(self, blocking): self.blocking = blocking # turn off blocking for recv and send self.recv_pipe.set_readblocking(blocking) self.send_pipe.set_writeblocking(blocking) def recv(self, nbytes): if self.io_error: raise self.io_error result = self.recv_pipe.read(nbytes) if self.io_error: raise self.io_error if result is None: # non-blocking read, nothing to read raise IOError(errno.EAGAIN, os.strerror(errno.EAGAIN), "MockSocket.recv") return result def send(self, data): if self.io_error: raise self.io_error result = self.send_pipe.write(data) if self.io_error: raise self.io_error if result is None: # non-blocking read, nothing to read raise IOError(errno.EAGAIN, os.strerror(errno.EAGAIN), "MockSocket.send") return result def shutdown(self, how): if self.io_error: raise self.io_error if how in (socket.SHUT_RD, socket.SHUT_RDWR): # don't want any more data self.recv_pipe.write_eof() # don't wait for recv buffer, we stopped reading # self.recv_wbuffer.flush() if how in (socket.SHUT_WR, socket.SHUT_RDWR): self.send_pipe.write_eof() # but wait for the client to finish reading self.send_pipe.set_writeblocking(True) self.send_rbuffer.flush() if self.io_error: raise self.io_error def mock_shutdown(self, how): if how in (socket.SHUT_WR, socket.SHUT_RDWR): self.recv_pipe.write_eof() # wait for the other end to finish reading self.recv_pipe.set_writeblocking(True) self.recv_wbuffer.flush() if how in (socket.SHUT_RD, socket.SHUT_RDWR): # don't want any more data self.send_pipe.write_eof() # but don't wait for send buffer, we stopped reading # self.send_rbuffer.flush() self.send_pipe.close() def close(self): self.send_pipe.close() self.recv_pipe.close()