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name : test_basesupport.py
 # Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.

from twisted.internet import defer, error
from twisted.trial import unittest
from twisted.words.im import basesupport


class DummyAccount(basesupport.AbstractAccount):
    """
    An account object that will do nothing when asked to start to log on.
    """

    loginHasFailed = False
    loginCallbackCalled = False

    def _startLogOn(self, *args):
        """
        Set self.loginDeferred to the same as the deferred returned, allowing a
        testcase to .callback or .errback.

        @return: A deferred.
        """
        self.loginDeferred = defer.Deferred()
        return self.loginDeferred

    def _loginFailed(self, result):
        self.loginHasFailed = True
        return basesupport.AbstractAccount._loginFailed(self, result)

    def _cb_logOn(self, result):
        self.loginCallbackCalled = True
        return basesupport.AbstractAccount._cb_logOn(self, result)


class DummyUI:
    """
    Provide just the interface required to be passed to AbstractAccount.logOn.
    """

    clientRegistered = False

    def registerAccountClient(self, result):
        self.clientRegistered = True


class ClientMsgTests(unittest.TestCase):
    def makeUI(self):
        return DummyUI()

    def makeAccount(self):
        return DummyAccount("la", False, "la", None, "localhost", 6667)

    def test_connect(self):
        """
        Test that account.logOn works, and it calls the right callback when a
        connection is established.
        """
        account = self.makeAccount()
        ui = self.makeUI()
        d = account.logOn(ui)
        account.loginDeferred.callback(None)

        def check(result):
            self.assertFalse(account.loginHasFailed, "Login shouldn't have failed")
            self.assertTrue(account.loginCallbackCalled, "We should be logged in")

        d.addCallback(check)
        return d

    def test_failedConnect(self):
        """
        Test that account.logOn works, and it calls the right callback when a
        connection is established.
        """
        account = self.makeAccount()
        ui = self.makeUI()
        d = account.logOn(ui)
        account.loginDeferred.errback(Exception())

        def err(reason):
            self.assertTrue(account.loginHasFailed, "Login should have failed")
            self.assertFalse(account.loginCallbackCalled, "We shouldn't be logged in")
            self.assertTrue(
                not ui.clientRegistered, "Client shouldn't be registered in the UI"
            )

        cb = lambda r: self.assertTrue(False, "Shouldn't get called back")
        d.addCallbacks(cb, err)
        return d

    def test_alreadyConnecting(self):
        """
        Test that it can fail sensibly when someone tried to connect before
        we did.
        """
        account = self.makeAccount()
        ui = self.makeUI()
        account.logOn(ui)
        self.assertRaises(error.ConnectError, account.logOn, ui)
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