"""Settings the tracker has to accept, and still work with.

An unrecognised key only warns, so coming up proves nothing on its own and a
test that cares has to look at what the tracker said. A key that is
recognised but cannot be parsed is another matter, and for the listen
statements it stops the tracker.
"""

import unittest

from harness import Tracker, TrackerTestCase, free_port


class TcpWorkers(TrackerTestCase):
    config = "listen.tcp.workers 2\n"

    def test_the_tracker_serves_with_tcp_workers_asked_for(self):
        self.assertEqual(self.tracker.announce(self.hash_for("tcpworkers"))[b"complete"], 1)
        self.assertNotIn("Unhandled line", self.tracker.output())


class WorkersOnAListenStatement(unittest.TestCase):
    def test_a_listen_statement_may_carry_a_worker_count(self):
        """The option is read off the statement rather than inherited."""
        second = free_port()
        tracker = Tracker("listen.tcp 127.0.0.1:%d workers=2\n" % second)
        try:
            self.assertEqual(tracker.announce(b"listenopts\0\0\0\0\0\0\0\0\0\0")[b"complete"], 1)
            complaints = tracker.stop()
            self.assertEqual(complaints, [], "the tracker reported:\n" + "\n".join(complaints))
        finally:
            tracker._cleanup()


class AListenLineThatDoesNotParse(unittest.TestCase):
    """Warning and carrying on left a tracker that had been told where to
    listen coming up on its default instead, which is every interface."""

    def refuses(self, line):
        with self.assertRaises(AssertionError) as caught:
            Tracker(line)
        return str(caught.exception)

    def test_an_address_that_is_not_one_stops_the_tracker(self):
        self.assertIn("want an address", self.refuses("listen.tcp 10.0.0.300:7999\n"))

    def test_so_does_a_port_out_of_range(self):
        self.assertIn("want an address", self.refuses("listen.udp 127.0.0.1:99999\n"))

    def test_so_does_an_option_it_does_not_know(self):
        self.assertIn("want an address", self.refuses("listen.tcp 127.0.0.1:7999 wokers=2\n"))