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import bsddb
import os
import sys
import shutil
import tempfile
import unittest

import coverage

from pglistener import pglistener
from pglistener.config import read_configs
from pglistener.daemon import Daemon
from pglistener.flatfile import FlatFile
from pglistener.nsspasswddb import NssPasswdDb

class TestListener(pglistener.PgListener):
    def __init__(self, options):
        pglistener.PgListener.__init__(self, options)

    def log(self, priority, message):
        pass

class PgListenerTest(unittest.TestCase):
    def setUp(self):
        self.tmpdir = tempfile.mkdtemp()

    def runTest(self):
        destination = os.path.join(self.tmpdir, 'destination')
        listener = TestListener({
            'name': 'fake',
            'dsn': 'fake',
            'notifications': [],
            'destination': destination,
            'format': '%s:%s\\n',
            'query': 'fake query'
            })
        listener.do_write([('a', '1'), ('b', '2')], listener.destination)
        self.assertEquals('a:1\nb:2\n', file(destination).read())

    def tearDown(self):
        shutil.rmtree(self.tmpdir)

class NssPasswdDbTest(unittest.TestCase):
    def setUp(self):
        self.tmpdir = tempfile.mkdtemp()

    def runTest(self):
        destination = os.path.join(self.tmpdir, 'destination')
        listener = NssPasswdDb({
            'name': 'fake',
            'dsn': 'fake',
            'notifications': [],
            'destination': destination,
            'format': '%s:%s\\n',
            'query': 'fake query'
            })
        listener.do_write([
            ('amy', 'x', 1000, 1000, 'amy', '/home/amy', '/bin/bash'),
            ('beth', 'x', 1001, 1001, 'beth', '/home/beth', '/bin/zsh')],
            listener.destination)
        db = bsddb.btopen(listener.destination, "r")
        self.assertEquals(
            'amy:x:1000:1000:amy:/home/amy:/bin/bash\x00', db['.amy'])
        self.assertEquals(
            'beth:x:1001:1001:beth:/home/beth:/bin/zsh\x00', db['=1001'])
        db.close()

    def tearDown(self):
        shutil.rmtree(self.tmpdir)

class FlatFileTest(unittest.TestCase):
    def setUp(self):
        self.tmpdir = tempfile.mkdtemp()

    def runTest(self):
        destination = os.path.join(self.tmpdir, 'destination')
        listener = FlatFile({
            'name': 'fake',
            'dsn': 'fake',
            'notifications': [],
            'destination': destination,
            'query': 'fake query'
            })
        listener.do_write([('1', 'foo'), ('2', 'bar')], listener.destination)
        self.assertEquals('1\tfoo\n2\tbar\n', file(listener.destination).read())

    def tearDown(self):
        shutil.rmtree(self.tmpdir)

class ConfigTest(unittest.TestCase):
    def setUp(self):
        self.tmpdir = tempfile.mkdtemp()

    def runTest(self):
        config_file = os.path.join(self.tmpdir, 'pglistener.cfg')
        config_dir = os.path.join(self.tmpdir, 'pglistener.d')
        os.mkdir(config_dir)

        def write_file(path, s):
            fh = file(path, 'w')
            fh.write(s)
            fh.close()

        config_str = (
            '[%s]\n' +
            'class = NssDb\n' +
            'notifications = foo\n' +
            'dsn = fake\n' +
            'query = fake\n' +
            'destination = fake\n')
        write_file(config_file, config_str % 'foo')
        write_file(os.path.join(config_dir, 'bar.cfg'), config_str % 'bar')
        (foo, bar) = list(read_configs([config_file, config_dir]))
        self.assertEquals('foo', foo.name)
        self.assertEquals('bar', bar.name)

    def tearDown(self):
        shutil.rmtree(self.tmpdir)

class DaemonTest(unittest.TestCase):
    def runTest(self):
        class FakeCursor(object):
            def execute(self, query):
                pass

            def fetchall(self):
                return "fake data"

            def isready(self):
                return True

            def fileno(self):
                (rfd, wfd) = os.pipe()
                os.write(wfd, '\0')
                return rfd

        class FakeConnection(object):
            notifies = [(0, 'fake notification')]

            def cursor(self):
                return FakeCursor()

            def set_isolation_level(self, level):
                pass

        class Listener(object):
            def __init__(self):
                self.dsn = 'hostname=fake,password=foo'
                self.name = 'fake name'
                self.query = 'fake query'
                self.destination = 'fake destination'
                self.notifications = ['fake notification']
                self.log = []

            def log(self, *data):
                self.log.append(data)

            def do_write(self, data, destination):
                self.log.append(('do_write', data, destination))

            def do_posthooks(self):
                self.log.append(('do_posthooks',))

        class TestDaemon(Daemon):
            def _make_connection(self, dsn):
                return FakeConnection()

            def err(self, msg):
                #print 'err: %s' % msg
                pass

            def info(self, msg):
                #print 'info: %s' % msg
                pass

            def openlog(self):
                pass

            def loop(self):
                pass

        listener = Listener()
        daemon = TestDaemon([listener])
        daemon.run()
        daemon.do_iteration()
        # Second iteration should do nothing since the connection's
        # notification list will have been emptied.
        daemon.do_iteration()
        self.assertEquals(
             [('do_write', 'fake data', 'fake destination'),
              ('do_posthooks',),
              ('do_write', 'fake data', 'fake destination'),
              ('do_posthooks',)], listener.log)

def run_coverage(*args):
    os.spawnlp(os.P_WAIT, 'python', 'python', coverage.__file__, *args)

def find_python_files(path):
    for dirpath, dirnames, filenames in os.walk(path):
        # Filter out non-packages.
        dirnames[:] = [d for d in dirnames
            if os.path.exists(os.path.join(dirpath, d, '__init__.py'))]

        for filename in filenames:
            if filename.endswith('.py'):
                yield os.path.join(dirpath, filename)

def main():
    for i in range(1, len(sys.argv)):
        if sys.argv[i] == '-c':
            del sys.argv[i]
            run_coverage('-e')
            run_coverage('-x', __file__, *sys.argv[1:])
            files = list(find_python_files('.'))
            run_coverage('-r', *files)
            run_coverage('-a', *files)
            raise SystemExit(0)

    unittest.main()

if __name__ == '__main__':
    main()