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from qpid.messaging import *
from qpid.tests.messaging import Base
import math

class ThresholdTests (Base):
    """
    Test queue threshold events are sent and received correctly
    """ 

    def setup_connection(self):
        return Connection.establish(self.broker, **self.connection_options())

    def setup_session(self):
        return self.conn.session()

    def do_threshold_test(self, key, value, messages):
        rcv = self.ssn.receiver("qmf.default.topic/agent.ind.event.org_apache_qpid_broker.queueThresholdExceeded.#")
        snd = self.ssn.sender("ttq; {create:always, node: {x-declare:{auto_delete:True,exclusive:True,arguments:{'%s':%s}}}}" % (key, value))
        size = 0
        count = 0
        for m in messages:
            snd.send(m)
            count = count + 1
            size = size + len(m.content)
        event = rcv.fetch()
        schema = event.content[0]["_schema_id"]
        assert schema["_class_name"] == "queueThresholdExceeded"
        values = event.content[0]["_values"]
        assert values["qName"] == "ttq"
        assert values["msgDepth"] == count, "msgDepth %s, expected %s" % (values["msgDepth"], count)
        assert values["byteDepth"] == size, "byteDepth %s, expected %s" % (values["byteDepth"], size)

    def test_alert_count(self):
        self.do_threshold_test("qpid.alert_count", 5, [Message("msg-%s" % i) for i in range(5)])

    def test_alert_size(self):
        self.do_threshold_test("qpid.alert_size", 25, [Message("msg-%s" % i) for i in range(5)])

    def test_alert_count_alias(self):
        self.do_threshold_test("x-qpid-maximum-message-count", 10, [Message("msg-%s" % i) for i in range(10)])

    def test_alert_size_alias(self):
        self.do_threshold_test("x-qpid-maximum-message-size", 15, [Message("msg-%s" % i) for i in range(3)])
