# Copyright (c) 2006-2007, Linden Research, Inc.
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

from unittest import TestCase, main
from eventlib import api
import socket

# TODO try and reuse unit tests from within Python itself

class TestGreenIo(TestCase):
    def test_close_with_makefile(self):
        def accept_close_early(listener):
            # verify that the makefile and the socket are truly independent
            # by closing the socket prior to using the made file
            try:
                conn, addr = listener.accept()
                fd = conn.makeGreenFile()
                conn.close()
                fd.write('hello\n')
                fd.close()
                self.assertRaises(socket.error, fd.write, 'a')
                self.assertRaises(socket.error, conn.send, 'b')
            finally:
                listener.close()

        def accept_close_late(listener):
            # verify that the makefile and the socket are truly independent
            # by closing the made file and then sending a character
            try:
                conn, addr = listener.accept()
                fd = conn.makeGreenFile()
                fd.write('hello')
                fd.close()
                conn.send('\n')
                conn.close()
                self.assertRaises(socket.error, fd.write, 'a')
                self.assertRaises(socket.error, conn.send, 'b')
            finally:
                listener.close()
                
        def did_it_work(server):
            client = api.connect_tcp(('127.0.0.1', server.getsockname()[1]))
            fd = client.makeGreenFile()
            client.close()
            assert fd.readline() == 'hello\n'    
            assert fd.read() == ''
            fd.close()
            
        server = api.tcp_listener(('0.0.0.0', 0))
        killer = api.spawn(accept_close_early, server)
        did_it_work(server)
        api.kill(killer)
        
        server = api.tcp_listener(('0.0.0.0', 0))
        killer = api.spawn(accept_close_late, server)
        did_it_work(server)
        api.kill(killer)

        
    def test_del_closes_socket(self):
        timer = api.exc_after(0.5, api.TimeoutError)
        def accept_once(listener):
            # delete/overwrite the original conn
            # object, only keeping the file object around
            # closing the file object should close everything
            try:
                conn, addr = listener.accept()
                conn = conn.makeGreenFile()
                conn.write('hello\n')
                conn.close()
                self.assertRaises(socket.error, conn.write, 'a')
            finally:
                listener.close()
        server = api.tcp_listener(('0.0.0.0', 0))
        killer = api.spawn(accept_once, server)
        client = api.connect_tcp(('127.0.0.1', server.getsockname()[1]))
        fd = client.makeGreenFile()
        client.close()
        assert fd.read() == 'hello\n'    
        assert fd.read() == ''
        
        timer.cancel()
                
if __name__ == '__main__':
    main()